/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:45:40,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:45:40,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:45:40,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:45:40,854 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:45:40,863 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:45:40,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:45:40,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:45:40,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:45:40,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:45:40,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:45:40,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:45:40,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:45:40,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:45:40,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:45:40,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:45:40,867 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:45:40,867 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:45:41,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:45:41,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:45:41,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:45:41,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:45:41,130 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:45:41,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-02-24 03:45:41,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2144f281e/08cccedab3724b3984fb935109e9c641/FLAG7ef87676a [2022-02-24 03:45:41,573 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:45:41,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-02-24 03:45:41,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2144f281e/08cccedab3724b3984fb935109e9c641/FLAG7ef87676a [2022-02-24 03:45:41,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2144f281e/08cccedab3724b3984fb935109e9c641 [2022-02-24 03:45:41,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:45:41,593 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:45:41,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:45:41,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:45:41,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:45:41,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c014528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41, skipping insertion in model container [2022-02-24 03:45:41,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:45:41,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:45:41,747 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c[318,331] [2022-02-24 03:45:41,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:45:41,763 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:45:41,780 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c[318,331] [2022-02-24 03:45:41,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:45:41,808 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:45:41,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41 WrapperNode [2022-02-24 03:45:41,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:45:41,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:45:41,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:45:41,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:45:41,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:45:41,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:45:41,836 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:45:41,836 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:45:41,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (1/1) ... [2022-02-24 03:45:41,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:45:41,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:45:41,885 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) [2022-02-24 03:45:41,910 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 [2022-02-24 03:45:41,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:45:41,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:45:41,932 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:45:41,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:45:41,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:45:41,932 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:45:41,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:45:41,932 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:45:41,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:45:41,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:45:41,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:45:41,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:45:41,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:45:41,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:45:41,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:45:41,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:45:41,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:45:41,995 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:45:41,999 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:45:42,083 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:45:42,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:45:42,089 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:45:42,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:45:42 BoogieIcfgContainer [2022-02-24 03:45:42,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:45:42,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:45:42,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:45:42,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:45:42,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:45:41" (1/3) ... [2022-02-24 03:45:42,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236f66d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:45:42, skipping insertion in model container [2022-02-24 03:45:42,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:45:41" (2/3) ... [2022-02-24 03:45:42,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@236f66d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:45:42, skipping insertion in model container [2022-02-24 03:45:42,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:45:42" (3/3) ... [2022-02-24 03:45:42,097 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2022-02-24 03:45:42,102 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:45:42,102 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:45:42,141 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:45:42,147 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=QVASR [2022-02-24 03:45:42,148 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:45:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 03:45:42,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:45:42,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:42,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:42,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:42,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-02-24 03:45:42,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:42,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161008474] [2022-02-24 03:45:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:42,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:42,228 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:45:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:42,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:42,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:42,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:42,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161008474] [2022-02-24 03:45:42,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [161008474] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:42,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:42,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:45:42,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039044608] [2022-02-24 03:45:42,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:42,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:45:42,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:42,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:45:42,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:45:42,345 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:42,392 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-24 03:45:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:45:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 03:45:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:42,399 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:45:42,399 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 03:45:42,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:45:42,404 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:42,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:45:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 03:45:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 03:45:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-24 03:45:42,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-24 03:45:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:42,468 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-24 03:45:42,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-24 03:45:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:45:42,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:42,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:42,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:45:42,470 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-02-24 03:45:42,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:42,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979042116] [2022-02-24 03:45:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:42,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:42,474 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:45:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:42,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:42,543 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:42,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979042116] [2022-02-24 03:45:42,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1979042116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:42,544 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:42,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:45:42,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921779356] [2022-02-24 03:45:42,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:42,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:45:42,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:42,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:45:42,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:45:42,546 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:42,588 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-02-24 03:45:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:45:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 03:45:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:42,589 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:45:42,589 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 03:45:42,590 INFO L932 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 [2022-02-24 03:45:42,591 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:42,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:45:42,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 03:45:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 03:45:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-24 03:45:42,598 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-24 03:45:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:42,599 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-24 03:45:42,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-24 03:45:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:45:42,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:42,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:42,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:45:42,600 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-02-24 03:45:42,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:42,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540780378] [2022-02-24 03:45:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:42,719 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:42,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:42,806 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:42,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540780378] [2022-02-24 03:45:42,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [540780378] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:42,807 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:42,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:45:42,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109097800] [2022-02-24 03:45:42,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:42,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:45:42,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:42,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:45:42,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:45:42,809 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:42,883 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-24 03:45:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:45:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 03:45:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:42,884 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:45:42,884 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:45:42,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:45:42,886 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:42,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:45:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:45:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:45:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-24 03:45:42,893 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-24 03:45:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:42,894 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-24 03:45:42,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-24 03:45:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:45:42,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:42,895 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:42,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:45:42,895 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-02-24 03:45:42,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:42,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61298379] [2022-02-24 03:45:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:42,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:43,643 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:43,907 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:43,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:44,051 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:44,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61298379] [2022-02-24 03:45:44,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61298379] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:44,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:44,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:45:44,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010633001] [2022-02-24 03:45:44,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:44,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:45:44,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:44,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:45:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:45:44,054 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:44,186 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-02-24 03:45:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:45:44,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:45:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:44,188 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:45:44,188 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 03:45:44,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:45:44,190 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:44,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:45:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 03:45:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 03:45:44,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-24 03:45:44,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2022-02-24 03:45:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:44,196 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-24 03:45:44,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-24 03:45:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:45:44,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:44,197 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:44,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:45:44,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1246825262, now seen corresponding path program 2 times [2022-02-24 03:45:44,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:44,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373046901] [2022-02-24 03:45:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:44,417 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:44,614 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:44,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:44,808 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:44,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373046901] [2022-02-24 03:45:44,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373046901] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:44,809 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:44,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:45:44,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246792923] [2022-02-24 03:45:44,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:44,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:45:44,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:45:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:45:44,814 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:44,990 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-02-24 03:45:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:45:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 03:45:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:44,991 INFO L225 Difference]: With dead ends: 47 [2022-02-24 03:45:44,991 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:45:44,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:45:44,993 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:44,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 19 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:45:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:45:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 03:45:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-24 03:45:44,998 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 24 [2022-02-24 03:45:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:44,999 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-24 03:45:44,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-24 03:45:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:45:45,000 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:45,000 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:45,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:45:45,000 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:45,001 INFO L85 PathProgramCache]: Analyzing trace with hash -319242389, now seen corresponding path program 3 times [2022-02-24 03:45:45,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:45,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024835226] [2022-02-24 03:45:45,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:45,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:45,195 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:45,373 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:45,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:45,575 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:45,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024835226] [2022-02-24 03:45:45,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024835226] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:45,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:45,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:45:45,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684206648] [2022-02-24 03:45:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:45,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:45:45,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:45:45,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:45:45,579 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:45,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:45,826 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-02-24 03:45:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:45:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 03:45:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:45,827 INFO L225 Difference]: With dead ends: 57 [2022-02-24 03:45:45,827 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 03:45:45,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:45:45,829 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:45,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:45:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 03:45:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 03:45:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-02-24 03:45:45,836 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2022-02-24 03:45:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:45,837 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-02-24 03:45:45,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-02-24 03:45:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:45:45,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:45,838 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:45,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:45:45,838 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash 951830946, now seen corresponding path program 4 times [2022-02-24 03:45:45,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:45,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123565277] [2022-02-24 03:45:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:45,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:46,019 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:46,198 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:46,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:46,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:46,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123565277] [2022-02-24 03:45:46,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [123565277] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:46,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:46,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:45:46,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984013104] [2022-02-24 03:45:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:46,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:45:46,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:45:46,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:45:46,422 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:46,773 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-02-24 03:45:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:45:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 03:45:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:46,775 INFO L225 Difference]: With dead ends: 67 [2022-02-24 03:45:46,775 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:45:46,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:45:46,776 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:46,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:45:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:45:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-24 03:45:46,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:46,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-02-24 03:45:46,783 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 34 [2022-02-24 03:45:46,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:46,783 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-02-24 03:45:46,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-02-24 03:45:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:45:46,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:46,784 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:46,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:45:46,785 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash 601551863, now seen corresponding path program 5 times [2022-02-24 03:45:46,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:46,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004906581] [2022-02-24 03:45:46,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:46,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:46,930 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:47,096 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:47,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:47,361 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:47,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004906581] [2022-02-24 03:45:47,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004906581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:47,361 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:47,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:45:47,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464979241] [2022-02-24 03:45:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:47,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:45:47,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:47,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:45:47,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:45:47,363 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:47,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:47,764 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-02-24 03:45:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:45:47,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 03:45:47,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:47,770 INFO L225 Difference]: With dead ends: 77 [2022-02-24 03:45:47,770 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:45:47,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=1077, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:45:47,771 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:47,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:45:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:45:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 03:45:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-02-24 03:45:47,778 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 39 [2022-02-24 03:45:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:47,779 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-02-24 03:45:47,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-02-24 03:45:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:45:47,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:47,780 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:47,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:45:47,780 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2144480746, now seen corresponding path program 6 times [2022-02-24 03:45:47,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:47,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278359688] [2022-02-24 03:45:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:47,960 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:48,157 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:48,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:48,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:48,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278359688] [2022-02-24 03:45:48,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [278359688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:48,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:48,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:45:48,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988741459] [2022-02-24 03:45:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:48,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:45:48,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:45:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:45:48,487 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:49,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:49,002 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-02-24 03:45:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:45:49,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 03:45:49,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:49,003 INFO L225 Difference]: With dead ends: 87 [2022-02-24 03:45:49,003 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:45:49,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:45:49,005 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:49,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 24 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:45:49,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:45:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-24 03:45:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-02-24 03:45:49,011 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2022-02-24 03:45:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:49,015 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-02-24 03:45:49,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-02-24 03:45:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 03:45:49,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:49,016 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:49,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:45:49,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash 266043011, now seen corresponding path program 7 times [2022-02-24 03:45:49,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:49,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636682502] [2022-02-24 03:45:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:49,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:49,169 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:49,299 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:49,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:49,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:49,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636682502] [2022-02-24 03:45:49,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1636682502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:49,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:49,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:45:49,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740299435] [2022-02-24 03:45:49,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:49,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:45:49,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:45:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:45:49,708 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:50,268 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-02-24 03:45:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:45:50,269 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-02-24 03:45:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:50,269 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:45:50,269 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 03:45:50,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=660, Invalid=1890, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:45:50,271 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:50,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 39 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:45:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 03:45:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 03:45:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-02-24 03:45:50,278 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2022-02-24 03:45:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:50,278 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-02-24 03:45:50,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-02-24 03:45:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 03:45:50,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:50,279 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:50,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:45:50,280 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:50,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2144068746, now seen corresponding path program 8 times [2022-02-24 03:45:50,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:50,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113104323] [2022-02-24 03:45:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:50,453 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:50,617 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:50,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:51,023 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:51,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113104323] [2022-02-24 03:45:51,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [113104323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:51,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:51,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:45:51,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710094070] [2022-02-24 03:45:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:51,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:45:51,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:45:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:45:51,026 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:51,787 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2022-02-24 03:45:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:45:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 03:45:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:51,788 INFO L225 Difference]: With dead ends: 107 [2022-02-24 03:45:51,788 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 03:45:51,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=810, Invalid=2382, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:45:51,790 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:51,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 24 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:45:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 03:45:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 03:45:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-02-24 03:45:51,797 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 54 [2022-02-24 03:45:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:51,797 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-02-24 03:45:51,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-02-24 03:45:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:45:51,798 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:51,798 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:51,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:45:51,798 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:51,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1636458737, now seen corresponding path program 9 times [2022-02-24 03:45:51,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:51,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638368745] [2022-02-24 03:45:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:51,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:51,988 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:52,154 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:52,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:52,590 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:52,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638368745] [2022-02-24 03:45:52,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [638368745] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:52,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:52,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:45:52,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537132098] [2022-02-24 03:45:52,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:52,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:45:52,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:52,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:45:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:45:52,593 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:53,470 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2022-02-24 03:45:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:45:53,470 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-24 03:45:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:53,471 INFO L225 Difference]: With dead ends: 117 [2022-02-24 03:45:53,471 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:45:53,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=2931, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:45:53,473 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:53,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 29 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:45:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:45:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 03:45:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-02-24 03:45:53,479 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2022-02-24 03:45:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:53,480 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-02-24 03:45:53,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-02-24 03:45:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 03:45:53,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:53,481 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:53,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:45:53,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:53,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1450885374, now seen corresponding path program 10 times [2022-02-24 03:45:53,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:53,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161582442] [2022-02-24 03:45:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:53,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:53,612 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:53,755 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:53,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:54,266 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:54,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161582442] [2022-02-24 03:45:54,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1161582442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:54,267 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:54,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:45:54,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713841167] [2022-02-24 03:45:54,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:54,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:45:54,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:54,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:45:54,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:45:54,268 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:55,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:55,182 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-02-24 03:45:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:45:55,182 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 03:45:55,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:55,183 INFO L225 Difference]: With dead ends: 127 [2022-02-24 03:45:55,183 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 03:45:55,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1155, Invalid=3537, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:45:55,185 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:55,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 24 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:45:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 03:45:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 03:45:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-02-24 03:45:55,198 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 64 [2022-02-24 03:45:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:55,198 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-02-24 03:45:55,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-02-24 03:45:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 03:45:55,199 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:55,199 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:55,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:45:55,200 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1956342373, now seen corresponding path program 11 times [2022-02-24 03:45:55,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:55,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963481133] [2022-02-24 03:45:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:55,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:55,344 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:55,486 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:55,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:56,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:56,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963481133] [2022-02-24 03:45:56,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [963481133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:56,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:56,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:45:56,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479998935] [2022-02-24 03:45:56,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:56,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:45:56,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:56,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:45:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1030, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:45:56,078 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:57,228 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-02-24 03:45:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:45:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 03:45:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:57,229 INFO L225 Difference]: With dead ends: 137 [2022-02-24 03:45:57,229 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 03:45:57,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1350, Invalid=4200, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:45:57,232 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:57,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 49 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:45:57,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 03:45:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 03:45:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-02-24 03:45:57,238 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 69 [2022-02-24 03:45:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:57,239 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-02-24 03:45:57,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-02-24 03:45:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:45:57,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:57,240 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:57,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:45:57,240 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:57,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1189029746, now seen corresponding path program 12 times [2022-02-24 03:45:57,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:57,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96093864] [2022-02-24 03:45:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:57,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:57,380 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:57,488 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:57,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:58,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:58,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96093864] [2022-02-24 03:45:58,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [96093864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:58,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:58,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 03:45:58,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147846272] [2022-02-24 03:45:58,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:58,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 03:45:58,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:58,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 03:45:58,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:45:58,054 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:59,251 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2022-02-24 03:45:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:45:59,252 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 03:45:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:59,252 INFO L225 Difference]: With dead ends: 147 [2022-02-24 03:45:59,252 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:45:59,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1560, Invalid=4920, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:45:59,255 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:59,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 29 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:45:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:45:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 03:45:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-02-24 03:45:59,262 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 74 [2022-02-24 03:45:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:59,262 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-02-24 03:45:59,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:59,263 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-02-24 03:45:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 03:45:59,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:59,266 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:59,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:45:59,267 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash -56384985, now seen corresponding path program 13 times [2022-02-24 03:45:59,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:59,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829514537] [2022-02-24 03:45:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:59,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:59,418 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:59,563 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:59,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:00,255 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:00,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829514537] [2022-02-24 03:46:00,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [829514537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:00,255 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:00,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:46:00,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969679083] [2022-02-24 03:46:00,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:00,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:46:00,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:00,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:46:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1383, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:46:00,257 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 44 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:01,571 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2022-02-24 03:46:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:46:01,571 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 44 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-24 03:46:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:01,572 INFO L225 Difference]: With dead ends: 157 [2022-02-24 03:46:01,572 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 03:46:01,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1785, Invalid=5697, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:46:01,574 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:01,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 29 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:46:01,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 03:46:01,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 03:46:01,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-02-24 03:46:01,580 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2022-02-24 03:46:01,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:01,580 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-02-24 03:46:01,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 44 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:01,580 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-02-24 03:46:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 03:46:01,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:01,581 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:01,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:46:01,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash 459134950, now seen corresponding path program 14 times [2022-02-24 03:46:01,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:01,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653736207] [2022-02-24 03:46:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:01,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:01,733 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:01,877 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:02,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:02,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:02,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653736207] [2022-02-24 03:46:02,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653736207] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:02,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:02,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 03:46:02,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763227125] [2022-02-24 03:46:02,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:02,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 03:46:02,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:02,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 03:46:02,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1579, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:46:02,615 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 47 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:04,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:04,114 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2022-02-24 03:46:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:46:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 47 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-24 03:46:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:04,116 INFO L225 Difference]: With dead ends: 167 [2022-02-24 03:46:04,116 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 03:46:04,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2025, Invalid=6531, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:46:04,118 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:04,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 59 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:46:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 03:46:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-24 03:46:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-02-24 03:46:04,123 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 84 [2022-02-24 03:46:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:04,123 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-02-24 03:46:04,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 47 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-02-24 03:46:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 03:46:04,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:04,124 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:04,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:46:04,124 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:04,125 INFO L85 PathProgramCache]: Analyzing trace with hash 510526643, now seen corresponding path program 15 times [2022-02-24 03:46:04,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:04,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72300916] [2022-02-24 03:46:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:04,267 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:04,404 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:04,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:05,223 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:05,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72300916] [2022-02-24 03:46:05,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [72300916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:05,224 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:05,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 03:46:05,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860060467] [2022-02-24 03:46:05,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:05,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:46:05,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:46:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=1788, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:46:05,226 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 50 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:06,841 INFO L93 Difference]: Finished difference Result 177 states and 188 transitions. [2022-02-24 03:46:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:46:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 50 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-24 03:46:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:06,842 INFO L225 Difference]: With dead ends: 177 [2022-02-24 03:46:06,842 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 03:46:06,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2659 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2280, Invalid=7422, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:46:06,843 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:06,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 34 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:46:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 03:46:06,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-24 03:46:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-02-24 03:46:06,849 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 89 [2022-02-24 03:46:06,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:06,849 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-02-24 03:46:06,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 50 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:06,849 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-02-24 03:46:06,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 03:46:06,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:06,850 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:06,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:46:06,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:06,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:06,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1977904550, now seen corresponding path program 16 times [2022-02-24 03:46:06,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:06,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568061938] [2022-02-24 03:46:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:07,004 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:07,160 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:07,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:07,998 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:07,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568061938] [2022-02-24 03:46:07,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [568061938] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:07,999 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:07,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 03:46:07,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326613788] [2022-02-24 03:46:07,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:07,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 03:46:07,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 03:46:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=2010, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:46:08,000 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:09,905 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2022-02-24 03:46:09,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:46:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-02-24 03:46:09,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:09,906 INFO L225 Difference]: With dead ends: 187 [2022-02-24 03:46:09,906 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 03:46:09,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2550, Invalid=8370, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:46:09,907 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 151 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:09,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 54 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:46:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 03:46:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-24 03:46:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-02-24 03:46:09,913 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 94 [2022-02-24 03:46:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:09,914 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-02-24 03:46:09,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-02-24 03:46:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 03:46:09,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:09,915 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:09,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:46:09,915 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:09,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:09,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1086390977, now seen corresponding path program 17 times [2022-02-24 03:46:09,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:09,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758942412] [2022-02-24 03:46:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:09,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:10,060 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:10,205 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:11,112 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:11,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758942412] [2022-02-24 03:46:11,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758942412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:11,113 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:11,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 03:46:11,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762281709] [2022-02-24 03:46:11,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:11,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 03:46:11,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 03:46:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=947, Invalid=2245, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:46:11,114 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:13,135 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2022-02-24 03:46:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 03:46:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-02-24 03:46:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:13,136 INFO L225 Difference]: With dead ends: 197 [2022-02-24 03:46:13,137 INFO L226 Difference]: Without dead ends: 105 [2022-02-24 03:46:13,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2835, Invalid=9375, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 03:46:13,139 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 196 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:13,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 69 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:46:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-24 03:46:13,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-02-24 03:46:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-02-24 03:46:13,149 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 99 [2022-02-24 03:46:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:13,150 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-02-24 03:46:13,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-02-24 03:46:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 03:46:13,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:13,150 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:13,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:46:13,151 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1728244018, now seen corresponding path program 18 times [2022-02-24 03:46:13,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:13,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594759070] [2022-02-24 03:46:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:13,305 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:13,449 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:13,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:14,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:14,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594759070] [2022-02-24 03:46:14,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1594759070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:14,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:14,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 03:46:14,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968996454] [2022-02-24 03:46:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:14,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 03:46:14,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 03:46:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1047, Invalid=2493, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:46:14,436 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:16,714 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2022-02-24 03:46:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 03:46:16,715 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-02-24 03:46:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:16,715 INFO L225 Difference]: With dead ends: 207 [2022-02-24 03:46:16,715 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 03:46:16,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3757 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3135, Invalid=10437, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:46:16,718 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:16,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 39 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:46:16,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 03:46:16,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-24 03:46:16,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-02-24 03:46:16,725 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 104 [2022-02-24 03:46:16,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:16,725 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-02-24 03:46:16,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-02-24 03:46:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 03:46:16,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:16,726 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:16,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:46:16,726 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:16,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:16,727 INFO L85 PathProgramCache]: Analyzing trace with hash -338572341, now seen corresponding path program 19 times [2022-02-24 03:46:16,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:16,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768438008] [2022-02-24 03:46:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:16,882 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:17,030 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:17,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:18,182 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:18,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768438008] [2022-02-24 03:46:18,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [768438008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:18,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:18,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:46:18,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482452632] [2022-02-24 03:46:18,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:18,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:46:18,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:46:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1152, Invalid=2754, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:46:18,184 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:20,741 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2022-02-24 03:46:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:46:20,743 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-02-24 03:46:20,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:20,743 INFO L225 Difference]: With dead ends: 217 [2022-02-24 03:46:20,744 INFO L226 Difference]: Without dead ends: 115 [2022-02-24 03:46:20,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3450, Invalid=11556, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 03:46:20,746 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 173 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:20,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 34 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:46:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-24 03:46:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-24 03:46:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-02-24 03:46:20,753 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 109 [2022-02-24 03:46:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:20,753 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-02-24 03:46:20,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-02-24 03:46:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-24 03:46:20,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:20,754 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:20,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:46:20,754 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:20,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:20,754 INFO L85 PathProgramCache]: Analyzing trace with hash 27731266, now seen corresponding path program 20 times [2022-02-24 03:46:20,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:20,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457363972] [2022-02-24 03:46:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:20,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:20,913 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:21,066 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:21,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:22,298 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:22,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457363972] [2022-02-24 03:46:22,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [457363972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:22,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:22,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 03:46:22,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373265810] [2022-02-24 03:46:22,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:22,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 03:46:22,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 03:46:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1262, Invalid=3028, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:46:22,300 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:24,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:24,996 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2022-02-24 03:46:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 03:46:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-24 03:46:24,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:24,998 INFO L225 Difference]: With dead ends: 227 [2022-02-24 03:46:24,998 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 03:46:25,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4594 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3780, Invalid=12732, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 03:46:25,000 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 225 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:25,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 29 Invalid, 3811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 3517 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:46:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 03:46:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-02-24 03:46:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-02-24 03:46:25,005 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 114 [2022-02-24 03:46:25,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:25,005 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-02-24 03:46:25,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-02-24 03:46:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-24 03:46:25,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:25,006 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:25,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:46:25,006 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1960726441, now seen corresponding path program 21 times [2022-02-24 03:46:25,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:25,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104656338] [2022-02-24 03:46:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:25,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:25,160 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:25,309 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:26,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:26,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104656338] [2022-02-24 03:46:26,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104656338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:26,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:26,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 03:46:26,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370189728] [2022-02-24 03:46:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:26,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 03:46:26,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 03:46:26,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=3315, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:46:26,643 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:29,518 INFO L93 Difference]: Finished difference Result 237 states and 248 transitions. [2022-02-24 03:46:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 03:46:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-02-24 03:46:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:29,519 INFO L225 Difference]: With dead ends: 237 [2022-02-24 03:46:29,519 INFO L226 Difference]: Without dead ends: 125 [2022-02-24 03:46:29,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5044 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4125, Invalid=13965, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 03:46:29,521 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 191 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3875 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:29,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 39 Invalid, 4138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3875 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:46:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-24 03:46:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-02-24 03:46:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-02-24 03:46:29,529 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 119 [2022-02-24 03:46:29,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:29,529 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-02-24 03:46:29,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-02-24 03:46:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 03:46:29,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:29,530 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:29,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:46:29,530 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:29,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1786872394, now seen corresponding path program 22 times [2022-02-24 03:46:29,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:29,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637306932] [2022-02-24 03:46:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:29,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:29,690 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:29,841 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:31,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:31,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637306932] [2022-02-24 03:46:31,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [637306932] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:31,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:31,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 03:46:31,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063135100] [2022-02-24 03:46:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:31,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 03:46:31,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:31,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 03:46:31,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=3615, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:46:31,253 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:34,437 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2022-02-24 03:46:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 03:46:34,437 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-02-24 03:46:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:34,438 INFO L225 Difference]: With dead ends: 247 [2022-02-24 03:46:34,438 INFO L226 Difference]: Without dead ends: 130 [2022-02-24 03:46:34,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5515 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4485, Invalid=15255, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 03:46:34,440 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 293 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:34,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 19 Invalid, 4575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:46:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-24 03:46:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-24 03:46:34,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.032) internal successors, (129), 125 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-02-24 03:46:34,448 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 124 [2022-02-24 03:46:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:34,448 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-02-24 03:46:34,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-02-24 03:46:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 03:46:34,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:34,449 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:34,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:46:34,449 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:34,450 INFO L85 PathProgramCache]: Analyzing trace with hash -93721885, now seen corresponding path program 23 times [2022-02-24 03:46:34,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:34,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658960065] [2022-02-24 03:46:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:34,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:34,580 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,691 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:34,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:36,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:36,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658960065] [2022-02-24 03:46:36,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [658960065] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:36,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:36,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 03:46:36,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102102039] [2022-02-24 03:46:36,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:36,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 03:46:36,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:36,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 03:46:36,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1622, Invalid=3928, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:46:36,198 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:39,592 INFO L93 Difference]: Finished difference Result 257 states and 268 transitions. [2022-02-24 03:46:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 03:46:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-02-24 03:46:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:39,593 INFO L225 Difference]: With dead ends: 257 [2022-02-24 03:46:39,593 INFO L226 Difference]: Without dead ends: 135 [2022-02-24 03:46:39,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4860, Invalid=16602, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 03:46:39,595 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 355 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:39,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 49 Invalid, 4875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:46:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-24 03:46:39,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-24 03:46:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-02-24 03:46:39,602 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 129 [2022-02-24 03:46:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:39,603 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-02-24 03:46:39,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-02-24 03:46:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-24 03:46:39,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:39,604 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:39,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:46:39,604 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1582833622, now seen corresponding path program 24 times [2022-02-24 03:46:39,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:39,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108716819] [2022-02-24 03:46:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:39,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:39,751 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:39,898 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:41,472 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:41,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108716819] [2022-02-24 03:46:41,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [108716819] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:41,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:41,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 03:46:41,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111491597] [2022-02-24 03:46:41,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:41,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 03:46:41,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:41,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 03:46:41,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1752, Invalid=4254, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:46:41,475 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:45,281 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2022-02-24 03:46:45,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 03:46:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-24 03:46:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:45,282 INFO L225 Difference]: With dead ends: 267 [2022-02-24 03:46:45,282 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 03:46:45,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6520 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5250, Invalid=18006, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 03:46:45,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5042 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 5042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:45,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 44 Invalid, 5335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 5042 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:46:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 03:46:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-24 03:46:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-02-24 03:46:45,291 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 134 [2022-02-24 03:46:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:45,292 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-02-24 03:46:45,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-02-24 03:46:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-24 03:46:45,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:45,292 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:45,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:46:45,292 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1457144977, now seen corresponding path program 25 times [2022-02-24 03:46:45,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:45,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597050758] [2022-02-24 03:46:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:45,441 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:45,588 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:45,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:47,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:47,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597050758] [2022-02-24 03:46:47,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [597050758] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:47,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:47,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 03:46:47,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445991157] [2022-02-24 03:46:47,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:47,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 03:46:47,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:47,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 03:46:47,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1887, Invalid=4593, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:46:47,309 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 80 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:51,135 INFO L93 Difference]: Finished difference Result 277 states and 288 transitions. [2022-02-24 03:46:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 03:46:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 80 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-24 03:46:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:51,144 INFO L225 Difference]: With dead ends: 277 [2022-02-24 03:46:51,144 INFO L226 Difference]: Without dead ends: 145 [2022-02-24 03:46:51,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7029 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5655, Invalid=19467, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 03:46:51,145 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5406 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 5603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 5406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:51,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 49 Invalid, 5603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 5406 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:46:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-24 03:46:51,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-02-24 03:46:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-02-24 03:46:51,152 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 139 [2022-02-24 03:46:51,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:51,152 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-02-24 03:46:51,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 80 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-02-24 03:46:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-24 03:46:51,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:51,153 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:51,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:46:51,153 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1393036446, now seen corresponding path program 26 times [2022-02-24 03:46:51,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:51,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869141106] [2022-02-24 03:46:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:51,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:51,320 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:51,429 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:51,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:53,123 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:53,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869141106] [2022-02-24 03:46:53,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1869141106] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:53,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:53,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 03:46:53,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603250658] [2022-02-24 03:46:53,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:53,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 03:46:53,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 03:46:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2027, Invalid=4945, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:46:53,124 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 83 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:57,238 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2022-02-24 03:46:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 03:46:57,239 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 83 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-24 03:46:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:57,240 INFO L225 Difference]: With dead ends: 287 [2022-02-24 03:46:57,240 INFO L226 Difference]: Without dead ends: 150 [2022-02-24 03:46:57,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7609 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6075, Invalid=20985, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 03:46:57,242 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 285 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5797 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 6059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 5797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:57,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 39 Invalid, 6059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 5797 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:46:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-24 03:46:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-02-24 03:46:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-02-24 03:46:57,251 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 144 [2022-02-24 03:46:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:57,251 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-02-24 03:46:57,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 83 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-02-24 03:46:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-24 03:46:57,252 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:57,252 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:57,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:46:57,253 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:57,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:57,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1257217541, now seen corresponding path program 27 times [2022-02-24 03:46:57,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:57,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704987071] [2022-02-24 03:46:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:57,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:57,439 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:57,556 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:57,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:59,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:59,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704987071] [2022-02-24 03:46:59,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1704987071] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:59,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:59,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 03:46:59,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274199754] [2022-02-24 03:46:59,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:59,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 03:46:59,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 03:46:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2172, Invalid=5310, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:46:59,357 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 86 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:03,766 INFO L93 Difference]: Finished difference Result 297 states and 308 transitions. [2022-02-24 03:47:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 03:47:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 86 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-02-24 03:47:03,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:03,767 INFO L225 Difference]: With dead ends: 297 [2022-02-24 03:47:03,767 INFO L226 Difference]: Without dead ends: 155 [2022-02-24 03:47:03,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8185 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6510, Invalid=22560, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 03:47:03,769 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6252 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 6252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:03,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 49 Invalid, 6465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 6252 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:47:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-24 03:47:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-02-24 03:47:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:03,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-02-24 03:47:03,777 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 149 [2022-02-24 03:47:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:03,777 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-02-24 03:47:03,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 86 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-02-24 03:47:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-24 03:47:03,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:03,778 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:03,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:47:03,778 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:03,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:03,779 INFO L85 PathProgramCache]: Analyzing trace with hash 440648466, now seen corresponding path program 28 times [2022-02-24 03:47:03,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:03,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946445108] [2022-02-24 03:47:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:03,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:03,945 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:04,090 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:04,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:06,090 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:06,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946445108] [2022-02-24 03:47:06,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946445108] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:06,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:06,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 03:47:06,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317876844] [2022-02-24 03:47:06,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:06,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 03:47:06,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:06,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 03:47:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2322, Invalid=5688, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:47:06,092 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 89 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:10,971 INFO L93 Difference]: Finished difference Result 307 states and 318 transitions. [2022-02-24 03:47:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 03:47:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 89 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-02-24 03:47:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:10,973 INFO L225 Difference]: With dead ends: 307 [2022-02-24 03:47:10,973 INFO L226 Difference]: Without dead ends: 160 [2022-02-24 03:47:10,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8782 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6960, Invalid=24192, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 03:47:10,976 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6727 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 7008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 6727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:10,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 64 Invalid, 7008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 6727 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:47:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-24 03:47:10,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-02-24 03:47:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-02-24 03:47:10,985 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 154 [2022-02-24 03:47:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:10,986 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-02-24 03:47:10,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 89 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-02-24 03:47:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-02-24 03:47:10,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:10,987 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:10,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:47:10,987 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2044387705, now seen corresponding path program 29 times [2022-02-24 03:47:10,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:10,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520282953] [2022-02-24 03:47:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:10,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:11,124 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:11,279 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:13,392 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:13,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520282953] [2022-02-24 03:47:13,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1520282953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:13,393 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:13,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 03:47:13,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329343747] [2022-02-24 03:47:13,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:13,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 03:47:13,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 03:47:13,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2477, Invalid=6079, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:47:13,395 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 92 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:18,742 INFO L93 Difference]: Finished difference Result 317 states and 328 transitions. [2022-02-24 03:47:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 03:47:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 92 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-02-24 03:47:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:18,748 INFO L225 Difference]: With dead ends: 317 [2022-02-24 03:47:18,748 INFO L226 Difference]: Without dead ends: 165 [2022-02-24 03:47:18,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9400 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7425, Invalid=25881, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 03:47:18,751 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 316 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7227 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 7227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:18,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 39 Invalid, 7638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 7227 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:47:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-24 03:47:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-02-24 03:47:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-02-24 03:47:18,761 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 159 [2022-02-24 03:47:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:18,761 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-02-24 03:47:18,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 92 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-02-24 03:47:18,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-24 03:47:18,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:18,762 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:18,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:47:18,763 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash 264225670, now seen corresponding path program 30 times [2022-02-24 03:47:18,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:18,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502751833] [2022-02-24 03:47:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:18,908 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:19,098 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:21,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:21,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502751833] [2022-02-24 03:47:21,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [502751833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:21,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:21,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 03:47:21,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394788717] [2022-02-24 03:47:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:21,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 03:47:21,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:21,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 03:47:21,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2637, Invalid=6483, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 03:47:21,321 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 95 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:26,934 INFO L93 Difference]: Finished difference Result 327 states and 338 transitions. [2022-02-24 03:47:26,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 03:47:26,934 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 95 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-02-24 03:47:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:26,935 INFO L225 Difference]: With dead ends: 327 [2022-02-24 03:47:26,935 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 03:47:26,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10039 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7905, Invalid=27627, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 03:47:26,937 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 326 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7723 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 7723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:26,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 34 Invalid, 8147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 7723 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:47:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 03:47:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-24 03:47:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 165 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-02-24 03:47:26,946 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 164 [2022-02-24 03:47:26,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:26,947 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-02-24 03:47:26,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 95 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-02-24 03:47:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-02-24 03:47:26,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:26,948 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:26,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:47:26,948 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1788817683, now seen corresponding path program 31 times [2022-02-24 03:47:26,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:26,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398572234] [2022-02-24 03:47:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:26,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:27,110 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:27,270 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:27,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:29,682 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:29,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398572234] [2022-02-24 03:47:29,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398572234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:29,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:29,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 03:47:29,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317965643] [2022-02-24 03:47:29,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:29,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 03:47:29,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:29,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 03:47:29,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2802, Invalid=6900, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:47:29,684 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 98 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:35,525 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2022-02-24 03:47:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 03:47:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 98 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-02-24 03:47:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:35,526 INFO L225 Difference]: With dead ends: 337 [2022-02-24 03:47:35,526 INFO L226 Difference]: Without dead ends: 175 [2022-02-24 03:47:35,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10699 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8400, Invalid=29430, Unknown=0, NotChecked=0, Total=37830 [2022-02-24 03:47:35,529 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 402 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 8249 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 8687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 8249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:35,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 64 Invalid, 8687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 8249 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:47:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-24 03:47:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-02-24 03:47:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-02-24 03:47:35,538 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 169 [2022-02-24 03:47:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:35,538 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-02-24 03:47:35,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 98 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-02-24 03:47:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-02-24 03:47:35,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:35,539 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:35,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:47:35,540 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:35,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1470156282, now seen corresponding path program 32 times [2022-02-24 03:47:35,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:35,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614220794] [2022-02-24 03:47:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:35,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:35,669 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:35,827 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:36,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:38,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:38,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614220794] [2022-02-24 03:47:38,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [614220794] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:38,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:38,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 03:47:38,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075453870] [2022-02-24 03:47:38,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:38,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 03:47:38,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 03:47:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2972, Invalid=7330, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:47:38,296 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 101 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:44,356 INFO L93 Difference]: Finished difference Result 347 states and 358 transitions. [2022-02-24 03:47:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 03:47:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 101 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-02-24 03:47:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:44,358 INFO L225 Difference]: With dead ends: 347 [2022-02-24 03:47:44,358 INFO L226 Difference]: Without dead ends: 180 [2022-02-24 03:47:44,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11380 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=8910, Invalid=31290, Unknown=0, NotChecked=0, Total=40200 [2022-02-24 03:47:44,362 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 483 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8635 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 8953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 8635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:44,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 29 Invalid, 8953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 8635 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-24 03:47:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-24 03:47:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-02-24 03:47:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-02-24 03:47:44,371 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 174 [2022-02-24 03:47:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:44,371 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-02-24 03:47:44,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 101 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-02-24 03:47:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-24 03:47:44,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:44,373 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:44,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:47:44,373 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:44,373 INFO L85 PathProgramCache]: Analyzing trace with hash 855234975, now seen corresponding path program 33 times [2022-02-24 03:47:44,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:44,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530389604] [2022-02-24 03:47:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:44,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:44,530 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:44,693 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:47,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:47,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530389604] [2022-02-24 03:47:47,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530389604] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:47,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:47,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 03:47:47,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320179741] [2022-02-24 03:47:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:47,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 03:47:47,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 03:47:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3147, Invalid=7773, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:47:47,299 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 104 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:53,631 INFO L93 Difference]: Finished difference Result 357 states and 368 transitions. [2022-02-24 03:47:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 03:47:53,632 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 104 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-02-24 03:47:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:53,632 INFO L225 Difference]: With dead ends: 357 [2022-02-24 03:47:53,632 INFO L226 Difference]: Without dead ends: 185 [2022-02-24 03:47:53,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12082 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=9435, Invalid=33207, Unknown=0, NotChecked=0, Total=42642 [2022-02-24 03:47:53,635 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 495 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9186 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 9373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 9186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:53,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 49 Invalid, 9373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 9186 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-24 03:47:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-24 03:47:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-02-24 03:47:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-02-24 03:47:53,642 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 179 [2022-02-24 03:47:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:53,642 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-02-24 03:47:53,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 104 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-02-24 03:47:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-02-24 03:47:53,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:53,643 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:53,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:47:53,643 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2050252178, now seen corresponding path program 34 times [2022-02-24 03:47:53,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:53,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577843799] [2022-02-24 03:47:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:53,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:53,829 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:53,941 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:56,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:56,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577843799] [2022-02-24 03:47:56,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [577843799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:56,577 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:56,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-24 03:47:56,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385965380] [2022-02-24 03:47:56,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:56,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-24 03:47:56,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:56,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-24 03:47:56,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3327, Invalid=8229, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:47:56,579 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 107 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:03,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:03,351 INFO L93 Difference]: Finished difference Result 367 states and 378 transitions. [2022-02-24 03:48:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-24 03:48:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 107 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-02-24 03:48:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:03,353 INFO L225 Difference]: With dead ends: 367 [2022-02-24 03:48:03,353 INFO L226 Difference]: Without dead ends: 190 [2022-02-24 03:48:03,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12805 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9975, Invalid=35181, Unknown=0, NotChecked=0, Total=45156 [2022-02-24 03:48:03,355 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 295 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9801 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 9801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:03,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 39 Invalid, 10207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 9801 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-24 03:48:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-24 03:48:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-02-24 03:48:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0216216216216216) internal successors, (189), 185 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 193 transitions. [2022-02-24 03:48:03,362 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 193 transitions. Word has length 184 [2022-02-24 03:48:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:03,362 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 193 transitions. [2022-02-24 03:48:03,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 107 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 193 transitions. [2022-02-24 03:48:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-02-24 03:48:03,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:03,363 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:03,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:48:03,363 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash -839886805, now seen corresponding path program 35 times [2022-02-24 03:48:03,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:03,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362751748] [2022-02-24 03:48:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:03,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:03,500 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:03,672 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:04,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:06,521 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:06,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362751748] [2022-02-24 03:48:06,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1362751748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:06,522 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:06,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 03:48:06,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436811071] [2022-02-24 03:48:06,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:06,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 03:48:06,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 03:48:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3512, Invalid=8698, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 03:48:06,524 INFO L87 Difference]: Start difference. First operand 190 states and 193 transitions. Second operand has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 110 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:13,628 INFO L93 Difference]: Finished difference Result 377 states and 388 transitions. [2022-02-24 03:48:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 03:48:13,628 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 110 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-02-24 03:48:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:13,629 INFO L225 Difference]: With dead ends: 377 [2022-02-24 03:48:13,629 INFO L226 Difference]: Without dead ends: 195 [2022-02-24 03:48:13,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13549 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10530, Invalid=37212, Unknown=0, NotChecked=0, Total=47742 [2022-02-24 03:48:13,633 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 228 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10315 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 10315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:13,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 39 Invalid, 10655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 10315 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:48:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-24 03:48:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-02-24 03:48:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-02-24 03:48:13,643 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 189 [2022-02-24 03:48:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:13,643 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-02-24 03:48:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 110 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-02-24 03:48:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-02-24 03:48:13,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:13,645 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:13,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:48:13,645 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash 31785186, now seen corresponding path program 36 times [2022-02-24 03:48:13,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:13,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448005651] [2022-02-24 03:48:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:13,816 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:13,969 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:14,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:17,101 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:17,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448005651] [2022-02-24 03:48:17,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448005651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:17,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:17,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-24 03:48:17,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753772340] [2022-02-24 03:48:17,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:17,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-24 03:48:17,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-24 03:48:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3702, Invalid=9180, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:48:17,103 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 113 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:24,650 INFO L93 Difference]: Finished difference Result 387 states and 398 transitions. [2022-02-24 03:48:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-24 03:48:24,651 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 113 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-02-24 03:48:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:24,651 INFO L225 Difference]: With dead ends: 387 [2022-02-24 03:48:24,651 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 03:48:24,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14314 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11100, Invalid=39300, Unknown=0, NotChecked=0, Total=50400 [2022-02-24 03:48:24,655 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 384 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10923 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 11423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 10923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:24,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 39 Invalid, 11423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 10923 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-24 03:48:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 03:48:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-02-24 03:48:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 195 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2022-02-24 03:48:24,665 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 194 [2022-02-24 03:48:24,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:24,665 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2022-02-24 03:48:24,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 113 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:24,665 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2022-02-24 03:48:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-02-24 03:48:24,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:24,666 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:24,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:48:24,666 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -461509449, now seen corresponding path program 37 times [2022-02-24 03:48:24,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:24,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459202300] [2022-02-24 03:48:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:24,823 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:24,935 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:27,999 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:27,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459202300] [2022-02-24 03:48:27,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [459202300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:27,999 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:27,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 03:48:27,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625754433] [2022-02-24 03:48:27,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:27,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 03:48:27,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 03:48:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3897, Invalid=9675, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:48:28,001 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 116 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:35,930 INFO L93 Difference]: Finished difference Result 397 states and 408 transitions. [2022-02-24 03:48:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 03:48:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 116 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-02-24 03:48:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:35,932 INFO L225 Difference]: With dead ends: 397 [2022-02-24 03:48:35,932 INFO L226 Difference]: Without dead ends: 205 [2022-02-24 03:48:35,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15100 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11685, Invalid=41445, Unknown=0, NotChecked=0, Total=53130 [2022-02-24 03:48:35,935 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 473 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11524 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 11524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:35,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 29 Invalid, 12040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 11524 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-24 03:48:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-24 03:48:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-02-24 03:48:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-02-24 03:48:35,945 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 199 [2022-02-24 03:48:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:35,946 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-02-24 03:48:35,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 116 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-02-24 03:48:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-24 03:48:35,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:35,947 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:35,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:48:35,947 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:35,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1800513878, now seen corresponding path program 38 times [2022-02-24 03:48:35,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:35,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870730868] [2022-02-24 03:48:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:35,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:36,102 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:36,251 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:36,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:39,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:39,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870730868] [2022-02-24 03:48:39,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870730868] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:39,513 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:39,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-24 03:48:39,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325150430] [2022-02-24 03:48:39,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:39,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-24 03:48:39,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-24 03:48:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=10183, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 03:48:39,515 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 119 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:47,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:47,770 INFO L93 Difference]: Finished difference Result 407 states and 418 transitions. [2022-02-24 03:48:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-24 03:48:47,770 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 119 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-02-24 03:48:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:47,771 INFO L225 Difference]: With dead ends: 407 [2022-02-24 03:48:47,771 INFO L226 Difference]: Without dead ends: 210 [2022-02-24 03:48:47,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15907 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=12285, Invalid=43647, Unknown=0, NotChecked=0, Total=55932 [2022-02-24 03:48:47,774 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12098 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 12384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 12098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:47,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 49 Invalid, 12384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 12098 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 03:48:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-24 03:48:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-24 03:48:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0195121951219512) internal successors, (209), 205 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 213 transitions. [2022-02-24 03:48:47,785 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 213 transitions. Word has length 204 [2022-02-24 03:48:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:47,785 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 213 transitions. [2022-02-24 03:48:47,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 119 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 213 transitions. [2022-02-24 03:48:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-24 03:48:47,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:47,786 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:47,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:48:47,786 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:47,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1977472835, now seen corresponding path program 39 times [2022-02-24 03:48:47,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:47,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503959958] [2022-02-24 03:48:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:47,917 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:48,067 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:48,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:51,442 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:51,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503959958] [2022-02-24 03:48:51,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [503959958] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:51,442 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:51,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-24 03:48:51,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56812668] [2022-02-24 03:48:51,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:51,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-24 03:48:51,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:51,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-24 03:48:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4302, Invalid=10704, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 03:48:51,445 INFO L87 Difference]: Start difference. First operand 210 states and 213 transitions. Second operand has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 122 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:00,236 INFO L93 Difference]: Finished difference Result 417 states and 428 transitions. [2022-02-24 03:49:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-24 03:49:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 122 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-02-24 03:49:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:00,237 INFO L225 Difference]: With dead ends: 417 [2022-02-24 03:49:00,237 INFO L226 Difference]: Without dead ends: 215 [2022-02-24 03:49:00,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16735 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=12900, Invalid=45906, Unknown=0, NotChecked=0, Total=58806 [2022-02-24 03:49:00,240 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 335 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12763 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 13224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 12763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:00,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 29 Invalid, 13224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 12763 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:49:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-24 03:49:00,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-02-24 03:49:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-02-24 03:49:00,248 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 209 [2022-02-24 03:49:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:00,248 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-02-24 03:49:00,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 122 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-02-24 03:49:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-02-24 03:49:00,249 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:00,249 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:00,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:49:00,249 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:00,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:00,249 INFO L85 PathProgramCache]: Analyzing trace with hash -46769206, now seen corresponding path program 40 times [2022-02-24 03:49:00,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:00,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647816975] [2022-02-24 03:49:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:00,367 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:00,519 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:01,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:04,207 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:04,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647816975] [2022-02-24 03:49:04,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647816975] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:04,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:04,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-24 03:49:04,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336607384] [2022-02-24 03:49:04,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:04,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-24 03:49:04,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-24 03:49:04,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4512, Invalid=11238, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 03:49:04,211 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 125 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:13,463 INFO L93 Difference]: Finished difference Result 427 states and 438 transitions. [2022-02-24 03:49:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-24 03:49:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 125 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-02-24 03:49:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:13,464 INFO L225 Difference]: With dead ends: 427 [2022-02-24 03:49:13,464 INFO L226 Difference]: Without dead ends: 220 [2022-02-24 03:49:13,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17584 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=13530, Invalid=48222, Unknown=0, NotChecked=0, Total=61752 [2022-02-24 03:49:13,467 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13407 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 13407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:13,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 44 Invalid, 13796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 13407 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-24 03:49:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-24 03:49:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-02-24 03:49:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 215 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-02-24 03:49:13,478 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 214 [2022-02-24 03:49:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:13,479 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-02-24 03:49:13,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 125 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:13,479 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-02-24 03:49:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-02-24 03:49:13,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:13,480 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:13,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:49:13,480 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:13,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1938511823, now seen corresponding path program 41 times [2022-02-24 03:49:13,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:13,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238324464] [2022-02-24 03:49:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:13,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:13,642 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:13,791 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:14,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:17,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:17,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238324464] [2022-02-24 03:49:17,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [238324464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:17,497 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:17,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-24 03:49:17,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635171710] [2022-02-24 03:49:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:17,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-24 03:49:17,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-24 03:49:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=11785, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 03:49:17,500 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 129 states, 129 states have (on average 1.6666666666666667) internal successors, (215), 128 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:27,125 INFO L93 Difference]: Finished difference Result 437 states and 448 transitions. [2022-02-24 03:49:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-24 03:49:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.6666666666666667) internal successors, (215), 128 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-02-24 03:49:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:27,127 INFO L225 Difference]: With dead ends: 437 [2022-02-24 03:49:27,127 INFO L226 Difference]: Without dead ends: 225 [2022-02-24 03:49:27,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18454 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=14175, Invalid=50595, Unknown=0, NotChecked=0, Total=64770 [2022-02-24 03:49:27,129 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 351 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14023 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 14023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:27,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 24 Invalid, 14419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 14023 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 03:49:27,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-24 03:49:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-02-24 03:49:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-02-24 03:49:27,136 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 219 [2022-02-24 03:49:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:27,137 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-02-24 03:49:27,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.6666666666666667) internal successors, (215), 128 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-02-24 03:49:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-24 03:49:27,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:27,138 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:27,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:49:27,138 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash -227026882, now seen corresponding path program 42 times [2022-02-24 03:49:27,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:27,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135486305] [2022-02-24 03:49:27,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:27,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:27,300 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:27,451 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:28,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:31,338 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:31,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135486305] [2022-02-24 03:49:31,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [135486305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:31,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:31,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-24 03:49:31,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011770203] [2022-02-24 03:49:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-24 03:49:31,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-24 03:49:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4947, Invalid=12345, Unknown=0, NotChecked=0, Total=17292 [2022-02-24 03:49:31,340 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 132 states, 132 states have (on average 1.6666666666666667) internal successors, (220), 131 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:41,566 INFO L93 Difference]: Finished difference Result 447 states and 458 transitions. [2022-02-24 03:49:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-24 03:49:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.6666666666666667) internal successors, (220), 131 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-02-24 03:49:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:41,567 INFO L225 Difference]: With dead ends: 447 [2022-02-24 03:49:41,567 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 03:49:41,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19345 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=14835, Invalid=53025, Unknown=0, NotChecked=0, Total=67860 [2022-02-24 03:49:41,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 711 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14751 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 14751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:41,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 34 Invalid, 15599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 14751 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-24 03:49:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 03:49:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-02-24 03:49:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 233 transitions. [2022-02-24 03:49:41,579 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 233 transitions. Word has length 224 [2022-02-24 03:49:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 233 transitions. [2022-02-24 03:49:41,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.6666666666666667) internal successors, (220), 131 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 233 transitions. [2022-02-24 03:49:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-24 03:49:41,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:41,580 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:41,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:49:41,581 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1564585563, now seen corresponding path program 43 times [2022-02-24 03:49:41,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:41,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524848985] [2022-02-24 03:49:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:41,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:41,707 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:41,860 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:42,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:45,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:45,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524848985] [2022-02-24 03:49:45,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1524848985] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:45,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:45,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-02-24 03:49:45,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064239585] [2022-02-24 03:49:45,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:45,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-02-24 03:49:45,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-02-24 03:49:45,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5172, Invalid=12918, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 03:49:45,868 INFO L87 Difference]: Start difference. First operand 230 states and 233 transitions. Second operand has 135 states, 135 states have (on average 1.6666666666666667) internal successors, (225), 134 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:56,486 INFO L93 Difference]: Finished difference Result 457 states and 468 transitions. [2022-02-24 03:49:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-24 03:49:56,486 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.6666666666666667) internal successors, (225), 134 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-02-24 03:49:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:56,487 INFO L225 Difference]: With dead ends: 457 [2022-02-24 03:49:56,487 INFO L226 Difference]: Without dead ends: 235 [2022-02-24 03:49:56,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20257 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=15510, Invalid=55512, Unknown=0, NotChecked=0, Total=71022 [2022-02-24 03:49:56,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 456 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 15484 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 15484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:56,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 59 Invalid, 15989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 15484 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-24 03:49:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-24 03:49:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-02-24 03:49:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-02-24 03:49:56,502 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 229 [2022-02-24 03:49:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:56,503 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-02-24 03:49:56,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.6666666666666667) internal successors, (225), 134 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-02-24 03:49:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-02-24 03:49:56,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:56,504 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:56,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:49:56,504 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash -373629262, now seen corresponding path program 44 times [2022-02-24 03:49:56,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:56,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113663441] [2022-02-24 03:49:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:56,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:56,672 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:56,850 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:57,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:01,064 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:01,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113663441] [2022-02-24 03:50:01,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [113663441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:01,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:01,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-24 03:50:01,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59413487] [2022-02-24 03:50:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:01,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-24 03:50:01,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-24 03:50:01,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5402, Invalid=13504, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 03:50:01,067 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 138 states, 138 states have (on average 1.6666666666666667) internal successors, (230), 137 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:12,442 INFO L93 Difference]: Finished difference Result 467 states and 478 transitions. [2022-02-24 03:50:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-24 03:50:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.6666666666666667) internal successors, (230), 137 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-02-24 03:50:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:12,443 INFO L225 Difference]: With dead ends: 467 [2022-02-24 03:50:12,444 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 03:50:12,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21190 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=16200, Invalid=58056, Unknown=0, NotChecked=0, Total=74256 [2022-02-24 03:50:12,447 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 559 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16159 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 16859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 16159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:12,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 49 Invalid, 16859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 16159 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-02-24 03:50:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 03:50:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-24 03:50:12,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-02-24 03:50:12,455 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 234 [2022-02-24 03:50:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:12,456 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-02-24 03:50:12,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.6666666666666667) internal successors, (230), 137 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-02-24 03:50:12,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-24 03:50:12,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:12,457 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:12,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:50:12,458 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash -587457817, now seen corresponding path program 45 times [2022-02-24 03:50:12,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:12,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581625859] [2022-02-24 03:50:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:12,649 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:12,774 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:13,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:17,233 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:17,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581625859] [2022-02-24 03:50:17,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1581625859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:17,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:17,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-02-24 03:50:17,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114033694] [2022-02-24 03:50:17,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:17,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-02-24 03:50:17,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-02-24 03:50:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5637, Invalid=14103, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 03:50:17,236 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 141 states, 141 states have (on average 1.6666666666666667) internal successors, (235), 140 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:29,093 INFO L93 Difference]: Finished difference Result 477 states and 488 transitions. [2022-02-24 03:50:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-24 03:50:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.6666666666666667) internal successors, (235), 140 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-24 03:50:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:29,094 INFO L225 Difference]: With dead ends: 477 [2022-02-24 03:50:29,094 INFO L226 Difference]: Without dead ends: 245 [2022-02-24 03:50:29,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22144 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=16905, Invalid=60657, Unknown=0, NotChecked=0, Total=77562 [2022-02-24 03:50:29,099 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 570 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16866 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 16866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:29,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 39 Invalid, 17394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 16866 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-24 03:50:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-24 03:50:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-02-24 03:50:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-02-24 03:50:29,112 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 239 [2022-02-24 03:50:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:29,112 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-02-24 03:50:29,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.6666666666666667) internal successors, (235), 140 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-02-24 03:50:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-02-24 03:50:29,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:29,113 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:29,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:50:29,114 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1231302438, now seen corresponding path program 46 times [2022-02-24 03:50:29,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:29,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440564310] [2022-02-24 03:50:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:29,242 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:29,417 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:34,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:34,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440564310] [2022-02-24 03:50:34,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440564310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:34,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:34,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-02-24 03:50:34,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18971342] [2022-02-24 03:50:34,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:34,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-02-24 03:50:34,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-02-24 03:50:34,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5877, Invalid=14715, Unknown=0, NotChecked=0, Total=20592 [2022-02-24 03:50:34,012 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 144 states, 144 states have (on average 1.6666666666666667) internal successors, (240), 143 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:46,414 INFO L93 Difference]: Finished difference Result 487 states and 498 transitions. [2022-02-24 03:50:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-02-24 03:50:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.6666666666666667) internal successors, (240), 143 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-02-24 03:50:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:46,415 INFO L225 Difference]: With dead ends: 487 [2022-02-24 03:50:46,415 INFO L226 Difference]: Without dead ends: 250 [2022-02-24 03:50:46,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23119 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=17625, Invalid=63315, Unknown=0, NotChecked=0, Total=80940 [2022-02-24 03:50:46,419 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 391 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17607 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 17607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:46,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 44 Invalid, 18143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 17607 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-02-24 03:50:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-24 03:50:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-02-24 03:50:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 245 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 253 transitions. [2022-02-24 03:50:46,431 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 253 transitions. Word has length 244 [2022-02-24 03:50:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:46,432 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 253 transitions. [2022-02-24 03:50:46,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.6666666666666667) internal successors, (240), 143 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 253 transitions. [2022-02-24 03:50:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-02-24 03:50:46,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:46,433 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:50:46,433 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1660280179, now seen corresponding path program 47 times [2022-02-24 03:50:46,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:46,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464879677] [2022-02-24 03:50:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:46,601 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:46,787 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:47,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:51,610 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:51,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464879677] [2022-02-24 03:50:51,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [464879677] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:51,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:51,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-02-24 03:50:51,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089486647] [2022-02-24 03:50:51,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:51,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-02-24 03:50:51,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-02-24 03:50:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6122, Invalid=15340, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 03:50:51,614 INFO L87 Difference]: Start difference. First operand 250 states and 253 transitions. Second operand has 147 states, 147 states have (on average 1.6666666666666667) internal successors, (245), 146 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:04,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:04,520 INFO L93 Difference]: Finished difference Result 497 states and 508 transitions. [2022-02-24 03:51:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-24 03:51:04,521 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.6666666666666667) internal successors, (245), 146 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-02-24 03:51:04,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:04,521 INFO L225 Difference]: With dead ends: 497 [2022-02-24 03:51:04,522 INFO L226 Difference]: Without dead ends: 255 [2022-02-24 03:51:04,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24115 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=18360, Invalid=66030, Unknown=0, NotChecked=0, Total=84390 [2022-02-24 03:51:04,525 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 496 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18322 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 18322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:04,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 29 Invalid, 18773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 18322 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 03:51:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-24 03:51:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-02-24 03:51:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-02-24 03:51:04,537 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 249 [2022-02-24 03:51:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:04,538 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-02-24 03:51:04,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.6666666666666667) internal successors, (245), 146 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-02-24 03:51:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-24 03:51:04,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:04,539 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:04,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:51:04,539 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1550284390, now seen corresponding path program 48 times [2022-02-24 03:51:04,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:04,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210364877] [2022-02-24 03:51:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:04,674 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:04,813 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:09,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:09,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210364877] [2022-02-24 03:51:09,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210364877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:09,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:09,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-02-24 03:51:09,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036753470] [2022-02-24 03:51:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:09,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-02-24 03:51:09,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-02-24 03:51:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6372, Invalid=15978, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 03:51:09,733 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 150 states, 150 states have (on average 1.6666666666666667) internal successors, (250), 149 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:23,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:23,169 INFO L93 Difference]: Finished difference Result 507 states and 518 transitions. [2022-02-24 03:51:23,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-02-24 03:51:23,169 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.6666666666666667) internal successors, (250), 149 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-02-24 03:51:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:23,170 INFO L225 Difference]: With dead ends: 507 [2022-02-24 03:51:23,170 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 03:51:23,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25132 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=19110, Invalid=68802, Unknown=0, NotChecked=0, Total=87912 [2022-02-24 03:51:23,174 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 307 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 19175 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 19532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 19175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:23,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 49 Invalid, 19532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 19175 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-24 03:51:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 03:51:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-02-24 03:51:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 263 transitions. [2022-02-24 03:51:23,187 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 263 transitions. Word has length 254 [2022-02-24 03:51:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:23,187 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 263 transitions. [2022-02-24 03:51:23,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.6666666666666667) internal successors, (250), 149 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 263 transitions. [2022-02-24 03:51:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-02-24 03:51:23,189 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:23,189 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:23,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:51:23,189 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1045809665, now seen corresponding path program 49 times [2022-02-24 03:51:23,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:23,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883067972] [2022-02-24 03:51:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:23,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:23,375 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:23,545 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:24,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:28,757 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:28,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883067972] [2022-02-24 03:51:28,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [883067972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:28,758 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:28,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-02-24 03:51:28,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731229597] [2022-02-24 03:51:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:28,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-02-24 03:51:28,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-02-24 03:51:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6627, Invalid=16629, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 03:51:28,760 INFO L87 Difference]: Start difference. First operand 260 states and 263 transitions. Second operand has 153 states, 153 states have (on average 1.6666666666666667) internal successors, (255), 152 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:42,853 INFO L93 Difference]: Finished difference Result 517 states and 528 transitions. [2022-02-24 03:51:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-24 03:51:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.6666666666666667) internal successors, (255), 152 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-02-24 03:51:42,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:42,856 INFO L225 Difference]: With dead ends: 517 [2022-02-24 03:51:42,856 INFO L226 Difference]: Without dead ends: 265 [2022-02-24 03:51:42,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26170 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=19875, Invalid=71631, Unknown=0, NotChecked=0, Total=91506 [2022-02-24 03:51:42,863 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 415 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 19974 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 20442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 19974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:42,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 49 Invalid, 20442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 19974 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-24 03:51:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-24 03:51:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-02-24 03:51:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0153846153846153) internal successors, (264), 260 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-02-24 03:51:42,877 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 259 [2022-02-24 03:51:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:42,877 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-02-24 03:51:42,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.6666666666666667) internal successors, (255), 152 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-02-24 03:51:42,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-02-24 03:51:42,879 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:42,879 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:42,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:51:42,879 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash 440184334, now seen corresponding path program 50 times [2022-02-24 03:51:42,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:42,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923456294] [2022-02-24 03:51:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:42,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:43,069 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:43,242 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:44,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:48,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:48,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923456294] [2022-02-24 03:51:48,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923456294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:48,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:48,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-02-24 03:51:48,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920967490] [2022-02-24 03:51:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:48,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-02-24 03:51:48,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-02-24 03:51:48,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6887, Invalid=17293, Unknown=0, NotChecked=0, Total=24180 [2022-02-24 03:51:48,572 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 156 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:03,229 INFO L93 Difference]: Finished difference Result 527 states and 538 transitions. [2022-02-24 03:52:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-02-24 03:52:03,231 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2022-02-24 03:52:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:03,232 INFO L225 Difference]: With dead ends: 527 [2022-02-24 03:52:03,232 INFO L226 Difference]: Without dead ends: 270 [2022-02-24 03:52:03,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27229 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=20655, Invalid=74517, Unknown=0, NotChecked=0, Total=95172 [2022-02-24 03:52:03,237 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 423 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20785 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 20785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:03,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 44 Invalid, 21367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 20785 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-02-24 03:52:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-24 03:52:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-02-24 03:52:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.0150943396226415) internal successors, (269), 265 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2022-02-24 03:52:03,251 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 264 [2022-02-24 03:52:03,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:03,251 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2022-02-24 03:52:03,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2022-02-24 03:52:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-24 03:52:03,253 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:03,253 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:03,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:52:03,253 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash -908827509, now seen corresponding path program 51 times [2022-02-24 03:52:03,253 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:03,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469709711] [2022-02-24 03:52:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:03,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:03,451 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:03,623 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:09,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:09,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469709711] [2022-02-24 03:52:09,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [469709711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:09,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:09,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-02-24 03:52:09,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445684157] [2022-02-24 03:52:09,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:09,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-02-24 03:52:09,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:09,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-02-24 03:52:09,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7152, Invalid=17970, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 03:52:09,172 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 159 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 158 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:24,523 INFO L93 Difference]: Finished difference Result 537 states and 548 transitions. [2022-02-24 03:52:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-24 03:52:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 158 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-02-24 03:52:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:24,524 INFO L225 Difference]: With dead ends: 537 [2022-02-24 03:52:24,524 INFO L226 Difference]: Without dead ends: 275 [2022-02-24 03:52:24,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28309 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=21450, Invalid=77460, Unknown=0, NotChecked=0, Total=98910 [2022-02-24 03:52:24,528 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 855 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21615 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 21615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:24,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 29 Invalid, 22634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 21615 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-02-24 03:52:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-24 03:52:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-02-24 03:52:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2022-02-24 03:52:24,542 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 269 [2022-02-24 03:52:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:24,542 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2022-02-24 03:52:24,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 158 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2022-02-24 03:52:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-02-24 03:52:24,544 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:24,544 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:24,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:52:24,544 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1024107390, now seen corresponding path program 52 times [2022-02-24 03:52:24,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:24,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005560947] [2022-02-24 03:52:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:24,721 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:24,852 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:25,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:30,604 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:30,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005560947] [2022-02-24 03:52:30,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005560947] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:30,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:30,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-02-24 03:52:30,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991996147] [2022-02-24 03:52:30,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:30,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-02-24 03:52:30,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:30,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-02-24 03:52:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7422, Invalid=18660, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:52:30,608 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 162 states, 162 states have (on average 1.6666666666666667) internal successors, (270), 161 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:46,374 INFO L93 Difference]: Finished difference Result 547 states and 558 transitions. [2022-02-24 03:52:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-02-24 03:52:46,375 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.6666666666666667) internal successors, (270), 161 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-02-24 03:52:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:46,376 INFO L225 Difference]: With dead ends: 547 [2022-02-24 03:52:46,376 INFO L226 Difference]: Without dead ends: 280 [2022-02-24 03:52:46,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29410 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=22260, Invalid=80460, Unknown=0, NotChecked=0, Total=102720 [2022-02-24 03:52:46,382 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 655 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22336 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 22336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:46,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 24 Invalid, 22941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 22336 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-24 03:52:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-24 03:52:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-02-24 03:52:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0145454545454546) internal successors, (279), 275 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2022-02-24 03:52:46,396 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 274 [2022-02-24 03:52:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:46,396 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2022-02-24 03:52:46,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.6666666666666667) internal successors, (270), 161 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2022-02-24 03:52:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-02-24 03:52:46,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:46,398 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:46,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:52:46,398 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash -428889833, now seen corresponding path program 53 times [2022-02-24 03:52:46,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:46,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760833136] [2022-02-24 03:52:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:46,561 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:46,774 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:52,832 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:52,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760833136] [2022-02-24 03:52:52,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [760833136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:52,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:52,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-02-24 03:52:52,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075246212] [2022-02-24 03:52:52,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-02-24 03:52:52,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-02-24 03:52:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7697, Invalid=19363, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 03:52:52,836 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 165 states, 165 states have (on average 1.6666666666666667) internal successors, (275), 164 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:09,192 INFO L93 Difference]: Finished difference Result 557 states and 568 transitions. [2022-02-24 03:53:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-02-24 03:53:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.6666666666666667) internal successors, (275), 164 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-02-24 03:53:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:09,195 INFO L225 Difference]: With dead ends: 557 [2022-02-24 03:53:09,195 INFO L226 Difference]: Without dead ends: 285 [2022-02-24 03:53:09,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30532 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=23085, Invalid=83517, Unknown=0, NotChecked=0, Total=106602 [2022-02-24 03:53:09,201 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 994 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 23232 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 23741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 23232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:09,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 49 Invalid, 23741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 23232 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-02-24 03:53:09,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-24 03:53:09,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-02-24 03:53:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 280 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:09,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-02-24 03:53:09,216 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 279 [2022-02-24 03:53:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:09,216 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-02-24 03:53:09,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.6666666666666667) internal successors, (275), 164 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-02-24 03:53:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-24 03:53:09,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:09,218 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:09,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:53:09,218 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash 187127030, now seen corresponding path program 54 times [2022-02-24 03:53:09,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:09,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214284251] [2022-02-24 03:53:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:09,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:09,418 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:09,604 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:10,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:15,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:15,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214284251] [2022-02-24 03:53:15,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214284251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:15,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:15,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-02-24 03:53:15,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799031559] [2022-02-24 03:53:15,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:15,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-02-24 03:53:15,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:15,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-02-24 03:53:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7977, Invalid=20079, Unknown=0, NotChecked=0, Total=28056 [2022-02-24 03:53:15,752 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 168 states, 168 states have (on average 1.6666666666666667) internal successors, (280), 167 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:32,806 INFO L93 Difference]: Finished difference Result 567 states and 578 transitions. [2022-02-24 03:53:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-24 03:53:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.6666666666666667) internal successors, (280), 167 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-02-24 03:53:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:32,808 INFO L225 Difference]: With dead ends: 567 [2022-02-24 03:53:32,808 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 03:53:32,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31675 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=23925, Invalid=86631, Unknown=0, NotChecked=0, Total=110556 [2022-02-24 03:53:32,813 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 564 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 24268 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 25003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 24268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:32,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 64 Invalid, 25003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 24268 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-02-24 03:53:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 03:53:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-02-24 03:53:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.0140350877192983) internal successors, (289), 285 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 293 transitions. [2022-02-24 03:53:32,838 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 293 transitions. Word has length 284 [2022-02-24 03:53:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 293 transitions. [2022-02-24 03:53:32,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.6666666666666667) internal successors, (280), 167 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 293 transitions. [2022-02-24 03:53:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-24 03:53:32,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:32,840 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:32,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 03:53:32,840 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1195949149, now seen corresponding path program 55 times [2022-02-24 03:53:32,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:32,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220569091] [2022-02-24 03:53:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:32,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:32,973 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:33,104 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:39,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:39,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220569091] [2022-02-24 03:53:39,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220569091] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:39,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:39,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-02-24 03:53:39,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9326619] [2022-02-24 03:53:39,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:39,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-24 03:53:39,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:39,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-24 03:53:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8262, Invalid=20808, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 03:53:39,500 INFO L87 Difference]: Start difference. First operand 290 states and 293 transitions. Second operand has 171 states, 171 states have (on average 1.6666666666666667) internal successors, (285), 170 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:57,172 INFO L93 Difference]: Finished difference Result 577 states and 588 transitions. [2022-02-24 03:53:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-24 03:53:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.6666666666666667) internal successors, (285), 170 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-02-24 03:53:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:57,173 INFO L225 Difference]: With dead ends: 577 [2022-02-24 03:53:57,173 INFO L226 Difference]: Without dead ends: 295 [2022-02-24 03:53:57,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32839 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=24780, Invalid=89802, Unknown=0, NotChecked=0, Total=114582 [2022-02-24 03:53:57,178 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 804 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 25161 mSolverCounterSat, 977 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 26138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 977 IncrementalHoareTripleChecker+Valid, 25161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:57,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 59 Invalid, 26138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [977 Valid, 25161 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-02-24 03:53:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-24 03:53:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-02-24 03:53:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.013793103448276) internal successors, (294), 290 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 298 transitions. [2022-02-24 03:53:57,193 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 298 transitions. Word has length 289 [2022-02-24 03:53:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:57,193 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 298 transitions. [2022-02-24 03:53:57,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.6666666666666667) internal successors, (285), 170 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:57,193 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 298 transitions. [2022-02-24 03:53:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-02-24 03:53:57,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:57,195 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:57,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 03:53:57,195 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash 469194602, now seen corresponding path program 56 times [2022-02-24 03:53:57,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:57,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221036404] [2022-02-24 03:53:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:57,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:57,383 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:57,516 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:58,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:04,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:04,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221036404] [2022-02-24 03:54:04,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [221036404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:04,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:04,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2022-02-24 03:54:04,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258672503] [2022-02-24 03:54:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:04,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-02-24 03:54:04,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:04,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-02-24 03:54:04,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8552, Invalid=21550, Unknown=0, NotChecked=0, Total=30102 [2022-02-24 03:54:04,044 INFO L87 Difference]: Start difference. First operand 295 states and 298 transitions. Second operand has 174 states, 174 states have (on average 1.6666666666666667) internal successors, (290), 173 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:22,331 INFO L93 Difference]: Finished difference Result 587 states and 598 transitions. [2022-02-24 03:54:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-02-24 03:54:22,332 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.6666666666666667) internal successors, (290), 173 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-02-24 03:54:22,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:22,333 INFO L225 Difference]: With dead ends: 587 [2022-02-24 03:54:22,333 INFO L226 Difference]: Without dead ends: 300 [2022-02-24 03:54:22,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34024 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=25650, Invalid=93030, Unknown=0, NotChecked=0, Total=118680 [2022-02-24 03:54:22,340 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 818 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 26083 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 26964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 26083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:22,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 59 Invalid, 26964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 26083 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-02-24 03:54:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-24 03:54:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-02-24 03:54:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2022-02-24 03:54:22,355 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 294 [2022-02-24 03:54:22,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:22,355 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2022-02-24 03:54:22,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.6666666666666667) internal successors, (290), 173 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2022-02-24 03:54:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-02-24 03:54:22,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:22,357 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:22,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 03:54:22,357 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1272548305, now seen corresponding path program 57 times [2022-02-24 03:54:22,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:22,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413704153] [2022-02-24 03:54:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:22,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:22,593 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:22,767 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:24,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:29,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:29,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413704153] [2022-02-24 03:54:29,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [413704153] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:29,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:29,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [177] imperfect sequences [] total 177 [2022-02-24 03:54:29,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197845191] [2022-02-24 03:54:29,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:29,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-02-24 03:54:29,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-02-24 03:54:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8847, Invalid=22305, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 03:54:29,723 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 177 states, 177 states have (on average 1.6666666666666667) internal successors, (295), 176 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:48,658 INFO L93 Difference]: Finished difference Result 597 states and 608 transitions. [2022-02-24 03:54:48,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-02-24 03:54:48,658 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.6666666666666667) internal successors, (295), 176 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-02-24 03:54:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:48,659 INFO L225 Difference]: With dead ends: 597 [2022-02-24 03:54:48,659 INFO L226 Difference]: Without dead ends: 305 [2022-02-24 03:54:48,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35230 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=26535, Invalid=96315, Unknown=0, NotChecked=0, Total=122850 [2022-02-24 03:54:48,663 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 597 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26843 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 27621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 26843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:48,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 54 Invalid, 27621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 26843 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-02-24 03:54:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-24 03:54:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-02-24 03:54:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 308 transitions. [2022-02-24 03:54:48,678 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 308 transitions. Word has length 299 [2022-02-24 03:54:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:48,678 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 308 transitions. [2022-02-24 03:54:48,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.6666666666666667) internal successors, (295), 176 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 308 transitions. [2022-02-24 03:54:48,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-02-24 03:54:48,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:48,680 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:48,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 03:54:48,680 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1045046238, now seen corresponding path program 58 times [2022-02-24 03:54:48,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:48,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303220114] [2022-02-24 03:54:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:48,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:48,881 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:49,058 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:50,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:56,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:56,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303220114] [2022-02-24 03:54:56,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1303220114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:56,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:56,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [180] imperfect sequences [] total 180 [2022-02-24 03:54:56,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158750235] [2022-02-24 03:54:56,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:56,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2022-02-24 03:54:56,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2022-02-24 03:54:56,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9147, Invalid=23073, Unknown=0, NotChecked=0, Total=32220 [2022-02-24 03:54:56,072 INFO L87 Difference]: Start difference. First operand 305 states and 308 transitions. Second operand has 180 states, 180 states have (on average 1.6666666666666667) internal successors, (300), 179 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:15,676 INFO L93 Difference]: Finished difference Result 607 states and 618 transitions. [2022-02-24 03:55:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-02-24 03:55:15,676 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.6666666666666667) internal successors, (300), 179 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2022-02-24 03:55:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:15,677 INFO L225 Difference]: With dead ends: 607 [2022-02-24 03:55:15,677 INFO L226 Difference]: Without dead ends: 310 [2022-02-24 03:55:15,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36399 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=27435, Invalid=99657, Unknown=0, NotChecked=0, Total=127092 [2022-02-24 03:55:15,682 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 846 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 27734 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 27734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:15,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 34 Invalid, 28526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 27734 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-02-24 03:55:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-24 03:55:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-02-24 03:55:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 305 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 313 transitions. [2022-02-24 03:55:15,697 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 313 transitions. Word has length 304 [2022-02-24 03:55:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:15,698 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 313 transitions. [2022-02-24 03:55:15,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.6666666666666667) internal successors, (300), 179 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 313 transitions. [2022-02-24 03:55:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-02-24 03:55:15,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:15,699 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:15,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 03:55:15,700 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:15,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:15,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1166509381, now seen corresponding path program 59 times [2022-02-24 03:55:15,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:15,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725794171] [2022-02-24 03:55:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:15,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:15,891 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:16,027 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:17,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:23,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:23,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725794171] [2022-02-24 03:55:23,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725794171] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:23,275 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:23,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [183] imperfect sequences [] total 183 [2022-02-24 03:55:23,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460471241] [2022-02-24 03:55:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:23,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-02-24 03:55:23,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-02-24 03:55:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9452, Invalid=23854, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 03:55:23,278 INFO L87 Difference]: Start difference. First operand 310 states and 313 transitions. Second operand has 183 states, 183 states have (on average 1.6666666666666667) internal successors, (305), 182 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:43,652 INFO L93 Difference]: Finished difference Result 617 states and 628 transitions. [2022-02-24 03:55:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-02-24 03:55:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.6666666666666667) internal successors, (305), 182 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-02-24 03:55:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:43,654 INFO L225 Difference]: With dead ends: 617 [2022-02-24 03:55:43,654 INFO L226 Difference]: Without dead ends: 315 [2022-02-24 03:55:43,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37705 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=28350, Invalid=103056, Unknown=0, NotChecked=0, Total=131406 [2022-02-24 03:55:43,659 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 856 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 28787 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 29835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 28787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:43,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 64 Invalid, 29835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 28787 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-02-24 03:55:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-24 03:55:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2022-02-24 03:55:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2022-02-24 03:55:43,675 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 309 [2022-02-24 03:55:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:43,675 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2022-02-24 03:55:43,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.6666666666666667) internal successors, (305), 182 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:43,676 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2022-02-24 03:55:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-02-24 03:55:43,677 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:43,677 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:43,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 03:55:43,677 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:43,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1053063762, now seen corresponding path program 60 times [2022-02-24 03:55:43,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:43,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060252098] [2022-02-24 03:55:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:43,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:43,896 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:44,092 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:45,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:51,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:51,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060252098] [2022-02-24 03:55:51,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060252098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:51,665 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:51,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [186] imperfect sequences [] total 186 [2022-02-24 03:55:51,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052105627] [2022-02-24 03:55:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:51,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-02-24 03:55:51,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-02-24 03:55:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9762, Invalid=24648, Unknown=0, NotChecked=0, Total=34410 [2022-02-24 03:55:51,669 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 186 states, 186 states have (on average 1.6666666666666667) internal successors, (310), 185 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:12,448 INFO L93 Difference]: Finished difference Result 627 states and 638 transitions. [2022-02-24 03:56:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-02-24 03:56:12,448 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.6666666666666667) internal successors, (310), 185 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2022-02-24 03:56:12,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:12,449 INFO L225 Difference]: With dead ends: 627 [2022-02-24 03:56:12,449 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 03:56:12,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38974 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=29280, Invalid=106512, Unknown=0, NotChecked=0, Total=135792 [2022-02-24 03:56:12,458 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 378 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 29791 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 29791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:12,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 64 Invalid, 30355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 29791 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-02-24 03:56:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 03:56:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-02-24 03:56:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.0126984126984127) internal successors, (319), 315 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 323 transitions. [2022-02-24 03:56:12,473 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 323 transitions. Word has length 314 [2022-02-24 03:56:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:12,473 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 323 transitions. [2022-02-24 03:56:12,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.6666666666666667) internal successors, (310), 185 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 323 transitions. [2022-02-24 03:56:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-02-24 03:56:12,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:12,475 INFO L514 BasicCegarLoop]: trace histogram [123, 122, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:12,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 03:56:12,475 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1213687993, now seen corresponding path program 61 times [2022-02-24 03:56:12,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:12,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203192757] [2022-02-24 03:56:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:12,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:12,643 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:12,854 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:14,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:20,592 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:20,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203192757] [2022-02-24 03:56:20,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203192757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:20,592 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:20,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [189] imperfect sequences [] total 189 [2022-02-24 03:56:20,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815865806] [2022-02-24 03:56:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:20,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-02-24 03:56:20,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-02-24 03:56:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10077, Invalid=25455, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 03:56:20,597 INFO L87 Difference]: Start difference. First operand 320 states and 323 transitions. Second operand has 189 states, 189 states have (on average 1.6666666666666667) internal successors, (315), 188 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:42,089 INFO L93 Difference]: Finished difference Result 637 states and 648 transitions. [2022-02-24 03:56:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-02-24 03:56:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.6666666666666667) internal successors, (315), 188 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-02-24 03:56:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:42,091 INFO L225 Difference]: With dead ends: 637 [2022-02-24 03:56:42,091 INFO L226 Difference]: Without dead ends: 325 [2022-02-24 03:56:42,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40264 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=30225, Invalid=110025, Unknown=0, NotChecked=0, Total=140250 [2022-02-24 03:56:42,096 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 886 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30748 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 31829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 30748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:42,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 39 Invalid, 31829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 30748 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2022-02-24 03:56:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-24 03:56:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-02-24 03:56:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.0125) internal successors, (324), 320 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2022-02-24 03:56:42,112 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 319 [2022-02-24 03:56:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:42,112 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2022-02-24 03:56:42,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.6666666666666667) internal successors, (315), 188 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2022-02-24 03:56:42,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-02-24 03:56:42,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:42,114 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:42,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 03:56:42,114 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:42,115 INFO L85 PathProgramCache]: Analyzing trace with hash -775218490, now seen corresponding path program 62 times [2022-02-24 03:56:42,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:42,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569953836] [2022-02-24 03:56:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:42,250 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:42,424 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:43,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:50,302 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:50,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569953836] [2022-02-24 03:56:50,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569953836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:50,302 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:50,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [] total 192 [2022-02-24 03:56:50,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500864198] [2022-02-24 03:56:50,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:50,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-02-24 03:56:50,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:50,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-02-24 03:56:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10397, Invalid=26275, Unknown=0, NotChecked=0, Total=36672 [2022-02-24 03:56:50,306 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand has 192 states, 192 states have (on average 1.6666666666666667) internal successors, (320), 191 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)