/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:02:45,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:02:45,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:02:45,907 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:02:45,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:02:45,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:02:45,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:02:45,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:02:45,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:02:45,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:02:45,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:02:45,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:02:45,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:02:45,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:02:45,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:02:45,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:02:45,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:02:45,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:02:45,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:02:45,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:02:45,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:02:45,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:02:45,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:02:45,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:02:45,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:02:45,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:02:45,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:02:45,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:02:45,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:02:45,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:02:45,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:02:45,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:02:46,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:02:46,000 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:02:46,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:02:46,000 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:02:46,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:02:46,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:02:46,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:02:46,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:02:46,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:02:46,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:02:46,002 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:02:46,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:02:46,003 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:02:46,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:02:46,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:02:46,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:02:46,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:02:46,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:02:46,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:02:46,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:02:46,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:02:46,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:02:46,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:02:46,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:02:46,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:02:46,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:02:46,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:02:46,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:02:46,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:02:46,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:02:46,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:02:46,357 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:02:46,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-08-18 22:02:46,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/281b3c916/d80c9724b20d4e6e81b9ffa01adb2d41/FLAG4630091ed [2020-08-18 22:02:46,932 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:02:46,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-08-18 22:02:46,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/281b3c916/d80c9724b20d4e6e81b9ffa01adb2d41/FLAG4630091ed [2020-08-18 22:02:47,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/281b3c916/d80c9724b20d4e6e81b9ffa01adb2d41 [2020-08-18 22:02:47,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:02:47,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:02:47,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:47,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:02:47,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:02:47,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e2873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47, skipping insertion in model container [2020-08-18 22:02:47,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:02:47,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:02:47,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:47,563 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:02:47,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:47,591 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:02:47,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47 WrapperNode [2020-08-18 22:02:47,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:47,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:02:47,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:02:47,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:02:47,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... [2020-08-18 22:02:47,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:02:47,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:02:47,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:02:47,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:02:47,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:02:47,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:02:47,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:02:47,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:02:47,761 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:02:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:02:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:02:47,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:02:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:02:47,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:02:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:02:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:02:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:02:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:02:48,012 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:02:48,012 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-18 22:02:48,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:48 BoogieIcfgContainer [2020-08-18 22:02:48,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:02:48,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:02:48,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:02:48,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:02:48,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:02:47" (1/3) ... [2020-08-18 22:02:48,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523a0079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:48, skipping insertion in model container [2020-08-18 22:02:48,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:47" (2/3) ... [2020-08-18 22:02:48,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523a0079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:48, skipping insertion in model container [2020-08-18 22:02:48,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:48" (3/3) ... [2020-08-18 22:02:48,047 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-08-18 22:02:48,064 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:02:48,072 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:02:48,087 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:02:48,111 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:02:48,111 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:02:48,111 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:02:48,111 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:02:48,112 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:02:48,112 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:02:48,112 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:02:48,112 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:02:48,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-18 22:02:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 22:02:48,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:48,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:48,139 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash 317368997, now seen corresponding path program 1 times [2020-08-18 22:02:48,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:48,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425137160] [2020-08-18 22:02:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:48,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425137160] [2020-08-18 22:02:48,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:48,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 22:02:48,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209474261] [2020-08-18 22:02:48,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 22:02:48,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 22:02:48,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 22:02:48,291 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-18 22:02:48,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:48,312 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-08-18 22:02:48,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 22:02:48,314 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-08-18 22:02:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:48,321 INFO L225 Difference]: With dead ends: 47 [2020-08-18 22:02:48,321 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 22:02:48,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 22:02:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 22:02:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-18 22:02:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 22:02:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-18 22:02:48,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-08-18 22:02:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:48,360 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-18 22:02:48,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 22:02:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-18 22:02:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 22:02:48,361 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:48,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:48,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:02:48,362 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:48,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1632722591, now seen corresponding path program 1 times [2020-08-18 22:02:48,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:48,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018909295] [2020-08-18 22:02:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:48,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018909295] [2020-08-18 22:02:48,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:48,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:02:48,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673666765] [2020-08-18 22:02:48,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:48,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:48,507 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-18 22:02:48,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:48,561 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-08-18 22:02:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:48,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-08-18 22:02:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:48,563 INFO L225 Difference]: With dead ends: 31 [2020-08-18 22:02:48,563 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 22:02:48,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 22:02:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 22:02:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 22:02:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 22:02:48,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 17 [2020-08-18 22:02:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:48,574 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 22:02:48,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 22:02:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 22:02:48,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:48,576 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:48,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:02:48,576 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1401298672, now seen corresponding path program 1 times [2020-08-18 22:02:48,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:48,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577939508] [2020-08-18 22:02:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-18 22:02:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:48,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577939508] [2020-08-18 22:02:48,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:48,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:02:48,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527426888] [2020-08-18 22:02:48,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:48,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:48,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:48,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:48,687 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-08-18 22:02:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:48,787 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-08-18 22:02:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:02:48,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-08-18 22:02:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:48,792 INFO L225 Difference]: With dead ends: 49 [2020-08-18 22:02:48,792 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 22:02:48,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:48,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 22:02:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-08-18 22:02:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:02:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 22:02:48,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-08-18 22:02:48,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:48,807 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 22:02:48,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 22:02:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:02:48,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:48,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:48,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:02:48,809 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:48,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1107622837, now seen corresponding path program 1 times [2020-08-18 22:02:48,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:48,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331936713] [2020-08-18 22:02:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:02:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:48,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331936713] [2020-08-18 22:02:48,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:48,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 22:02:48,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580265498] [2020-08-18 22:02:48,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:02:48,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:02:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:48,900 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-08-18 22:02:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:48,999 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-08-18 22:02:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:49,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-08-18 22:02:49,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:49,001 INFO L225 Difference]: With dead ends: 55 [2020-08-18 22:02:49,002 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 22:02:49,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 22:02:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-08-18 22:02:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 22:02:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 22:02:49,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-18 22:02:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:49,012 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 22:02:49,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:02:49,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 22:02:49,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 22:02:49,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:49,013 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:49,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:02:49,014 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:49,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1590427366, now seen corresponding path program 2 times [2020-08-18 22:02:49,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:49,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197142640] [2020-08-18 22:02:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 22:02:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:49,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197142640] [2020-08-18 22:02:49,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:49,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:02:49,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022378510] [2020-08-18 22:02:49,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:02:49,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:02:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:49,184 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2020-08-18 22:02:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:49,269 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-08-18 22:02:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:02:49,270 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-08-18 22:02:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:49,271 INFO L225 Difference]: With dead ends: 47 [2020-08-18 22:02:49,273 INFO L226 Difference]: Without dead ends: 45 [2020-08-18 22:02:49,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-18 22:02:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-18 22:02:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-18 22:02:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-08-18 22:02:49,289 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 29 [2020-08-18 22:02:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:49,289 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-08-18 22:02:49,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:02:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-08-18 22:02:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 22:02:49,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:49,295 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:49,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:02:49,295 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash -30298372, now seen corresponding path program 3 times [2020-08-18 22:02:49,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:49,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912146797] [2020-08-18 22:02:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 22:02:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 22:02:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 22:02:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 22:02:49,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912146797] [2020-08-18 22:02:49,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:49,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:02:49,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122564611] [2020-08-18 22:02:49,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:02:49,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:49,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:02:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:02:49,446 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-08-18 22:02:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:49,576 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-08-18 22:02:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:02:49,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-08-18 22:02:49,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:49,579 INFO L225 Difference]: With dead ends: 83 [2020-08-18 22:02:49,579 INFO L226 Difference]: Without dead ends: 58 [2020-08-18 22:02:49,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:02:49,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-18 22:02:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2020-08-18 22:02:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 22:02:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 22:02:49,589 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 45 [2020-08-18 22:02:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:49,590 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 22:02:49,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:02:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 22:02:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 22:02:49,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:49,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:49,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:02:49,592 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash 130155809, now seen corresponding path program 4 times [2020-08-18 22:02:49,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:49,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470330887] [2020-08-18 22:02:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 22:02:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:02:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 22:02:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 22:02:49,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470330887] [2020-08-18 22:02:49,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:49,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:02:49,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089600808] [2020-08-18 22:02:49,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:02:49,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:49,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:02:49,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:02:49,709 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 10 states. [2020-08-18 22:02:49,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:49,854 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2020-08-18 22:02:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:02:49,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-08-18 22:02:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:49,856 INFO L225 Difference]: With dead ends: 87 [2020-08-18 22:02:49,856 INFO L226 Difference]: Without dead ends: 64 [2020-08-18 22:02:49,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:02:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-18 22:02:49,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 48. [2020-08-18 22:02:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-18 22:02:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-08-18 22:02:49,865 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 47 [2020-08-18 22:02:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:49,866 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-08-18 22:02:49,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:02:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-08-18 22:02:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 22:02:49,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:49,868 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:49,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:02:49,868 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash -292198906, now seen corresponding path program 5 times [2020-08-18 22:02:49,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:49,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134045786] [2020-08-18 22:02:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:49,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:02:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 22:02:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:02:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-08-18 22:02:50,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134045786] [2020-08-18 22:02:50,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:50,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:02:50,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797461160] [2020-08-18 22:02:50,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:02:50,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:50,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:02:50,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:02:50,021 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 9 states. [2020-08-18 22:02:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:50,109 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2020-08-18 22:02:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:02:50,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-08-18 22:02:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:50,113 INFO L225 Difference]: With dead ends: 63 [2020-08-18 22:02:50,113 INFO L226 Difference]: Without dead ends: 61 [2020-08-18 22:02:50,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:02:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-18 22:02:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-08-18 22:02:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-18 22:02:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-08-18 22:02:50,132 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 49 [2020-08-18 22:02:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:50,134 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-08-18 22:02:50,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:02:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-08-18 22:02:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 22:02:50,136 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:50,141 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:50,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:02:50,142 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 551795688, now seen corresponding path program 6 times [2020-08-18 22:02:50,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:50,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525900315] [2020-08-18 22:02:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 22:02:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 22:02:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:02:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:02:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:02:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 60 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 22:02:50,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525900315] [2020-08-18 22:02:50,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:50,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:02:50,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482656981] [2020-08-18 22:02:50,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:02:50,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:50,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:02:50,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:02:50,374 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 13 states. [2020-08-18 22:02:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:50,540 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2020-08-18 22:02:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:02:50,540 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-08-18 22:02:50,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:50,542 INFO L225 Difference]: With dead ends: 115 [2020-08-18 22:02:50,542 INFO L226 Difference]: Without dead ends: 82 [2020-08-18 22:02:50,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:02:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-18 22:02:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-08-18 22:02:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 22:02:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-08-18 22:02:50,552 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 65 [2020-08-18 22:02:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:50,553 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-08-18 22:02:50,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:02:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-08-18 22:02:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 22:02:50,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:50,555 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:50,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 22:02:50,555 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:50,556 INFO L82 PathProgramCache]: Analyzing trace with hash -150434419, now seen corresponding path program 7 times [2020-08-18 22:02:50,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:50,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775373873] [2020-08-18 22:02:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 22:02:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 22:02:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 22:02:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 22:02:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:02:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 22:02:50,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775373873] [2020-08-18 22:02:50,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:50,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:02:50,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747200748] [2020-08-18 22:02:50,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:02:50,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:50,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:02:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:02:50,771 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 14 states. [2020-08-18 22:02:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:50,966 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2020-08-18 22:02:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:02:50,967 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-18 22:02:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:50,970 INFO L225 Difference]: With dead ends: 119 [2020-08-18 22:02:50,970 INFO L226 Difference]: Without dead ends: 88 [2020-08-18 22:02:50,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:02:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-18 22:02:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-08-18 22:02:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 22:02:50,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-08-18 22:02:50,993 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 67 [2020-08-18 22:02:50,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:50,994 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-08-18 22:02:50,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:02:50,995 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-08-18 22:02:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 22:02:50,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:50,998 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:50,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 22:02:50,999 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash -683701774, now seen corresponding path program 8 times [2020-08-18 22:02:51,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:51,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503698472] [2020-08-18 22:02:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 22:02:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 22:02:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:02:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:02:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:02:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-18 22:02:51,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503698472] [2020-08-18 22:02:51,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:51,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:02:51,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572231501] [2020-08-18 22:02:51,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:02:51,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:51,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:02:51,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:02:51,220 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 11 states. [2020-08-18 22:02:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:51,339 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-08-18 22:02:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:02:51,342 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-08-18 22:02:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:51,343 INFO L225 Difference]: With dead ends: 79 [2020-08-18 22:02:51,344 INFO L226 Difference]: Without dead ends: 77 [2020-08-18 22:02:51,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:02:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-08-18 22:02:51,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-08-18 22:02:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 22:02:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-08-18 22:02:51,363 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 69 [2020-08-18 22:02:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:51,364 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-08-18 22:02:51,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:02:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-08-18 22:02:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 22:02:51,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:51,370 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:51,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 22:02:51,370 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash 192972756, now seen corresponding path program 9 times [2020-08-18 22:02:51,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:51,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268920084] [2020-08-18 22:02:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 22:02:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 22:02:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:02:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:02:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:02:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:02:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:02:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 112 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 22:02:51,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268920084] [2020-08-18 22:02:51,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:51,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:02:51,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440720386] [2020-08-18 22:02:51,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:02:51,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:02:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:02:51,649 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 17 states. [2020-08-18 22:02:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:51,914 INFO L93 Difference]: Finished difference Result 147 states and 174 transitions. [2020-08-18 22:02:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:02:51,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2020-08-18 22:02:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:51,916 INFO L225 Difference]: With dead ends: 147 [2020-08-18 22:02:51,916 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 22:02:51,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:02:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 22:02:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-08-18 22:02:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-18 22:02:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-08-18 22:02:51,926 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 85 [2020-08-18 22:02:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:51,926 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-08-18 22:02:51,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 22:02:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-08-18 22:02:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 22:02:51,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:51,928 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:51,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 22:02:51,928 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1722356985, now seen corresponding path program 10 times [2020-08-18 22:02:51,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:51,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43235940] [2020-08-18 22:02:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 22:02:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 22:02:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:02:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 22:02:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 22:02:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:02:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:02:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 112 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 22:02:52,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43235940] [2020-08-18 22:02:52,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:52,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 22:02:52,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363712044] [2020-08-18 22:02:52,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 22:02:52,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:52,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 22:02:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:02:52,162 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 18 states. [2020-08-18 22:02:52,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:52,468 INFO L93 Difference]: Finished difference Result 151 states and 181 transitions. [2020-08-18 22:02:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:02:52,468 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-08-18 22:02:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:52,469 INFO L225 Difference]: With dead ends: 151 [2020-08-18 22:02:52,469 INFO L226 Difference]: Without dead ends: 112 [2020-08-18 22:02:52,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:02:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-18 22:02:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-08-18 22:02:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-18 22:02:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-08-18 22:02:52,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 87 [2020-08-18 22:02:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:52,478 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-08-18 22:02:52,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 22:02:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-08-18 22:02:52,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 22:02:52,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:52,483 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:52,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 22:02:52,483 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:52,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1713181474, now seen corresponding path program 11 times [2020-08-18 22:02:52,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:52,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385848961] [2020-08-18 22:02:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 22:02:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:02:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:02:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:02:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:02:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:02:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:02:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 86 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-18 22:02:52,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385848961] [2020-08-18 22:02:52,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:52,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 22:02:52,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106222461] [2020-08-18 22:02:52,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 22:02:52,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:52,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 22:02:52,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:02:52,655 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 13 states. [2020-08-18 22:02:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:52,776 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-08-18 22:02:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 22:02:52,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-08-18 22:02:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:52,779 INFO L225 Difference]: With dead ends: 95 [2020-08-18 22:02:52,780 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 22:02:52,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:02:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 22:02:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-08-18 22:02:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-08-18 22:02:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-08-18 22:02:52,795 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 89 [2020-08-18 22:02:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:52,797 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-08-18 22:02:52,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 22:02:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-08-18 22:02:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-18 22:02:52,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:52,798 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:52,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 22:02:52,799 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:52,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1950838080, now seen corresponding path program 12 times [2020-08-18 22:02:52,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:52,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080045997] [2020-08-18 22:02:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 22:02:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:02:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:02:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:02:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:02:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:02:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:02:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:02:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:02:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 180 proven. 72 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-18 22:02:53,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080045997] [2020-08-18 22:02:53,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:53,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:02:53,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257741438] [2020-08-18 22:02:53,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:02:53,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:02:53,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:02:53,175 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 21 states. [2020-08-18 22:02:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:53,483 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2020-08-18 22:02:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:02:53,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-08-18 22:02:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:53,485 INFO L225 Difference]: With dead ends: 179 [2020-08-18 22:02:53,485 INFO L226 Difference]: Without dead ends: 130 [2020-08-18 22:02:53,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:02:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-18 22:02:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 94. [2020-08-18 22:02:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-18 22:02:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2020-08-18 22:02:53,496 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 105 [2020-08-18 22:02:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:53,496 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2020-08-18 22:02:53,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:02:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2020-08-18 22:02:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 22:02:53,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:53,498 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:53,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 22:02:53,498 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:53,499 INFO L82 PathProgramCache]: Analyzing trace with hash -734782619, now seen corresponding path program 13 times [2020-08-18 22:02:53,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:53,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696234569] [2020-08-18 22:02:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 22:02:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 22:02:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 22:02:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:02:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 22:02:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:02:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:02:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 22:02:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 22:02:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 180 proven. 90 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-18 22:02:53,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696234569] [2020-08-18 22:02:53,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:53,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 22:02:53,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360054585] [2020-08-18 22:02:53,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 22:02:53,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 22:02:53,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:02:53,794 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand 22 states. [2020-08-18 22:02:54,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:54,155 INFO L93 Difference]: Finished difference Result 183 states and 220 transitions. [2020-08-18 22:02:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 22:02:54,156 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-18 22:02:54,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:54,159 INFO L225 Difference]: With dead ends: 183 [2020-08-18 22:02:54,159 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 22:02:54,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=686, Unknown=0, NotChecked=0, Total=992 [2020-08-18 22:02:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 22:02:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-08-18 22:02:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 22:02:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-08-18 22:02:54,174 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 107 [2020-08-18 22:02:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:54,174 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-08-18 22:02:54,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 22:02:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-08-18 22:02:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 22:02:54,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:54,179 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:54,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 22:02:54,179 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:54,179 INFO L82 PathProgramCache]: Analyzing trace with hash -336589110, now seen corresponding path program 14 times [2020-08-18 22:02:54,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:54,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573249606] [2020-08-18 22:02:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 22:02:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:02:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:02:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:02:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:02:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:02:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:02:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:02:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:02:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 128 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-18 22:02:54,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573249606] [2020-08-18 22:02:54,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:54,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 22:02:54,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852251487] [2020-08-18 22:02:54,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 22:02:54,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 22:02:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 22:02:54,356 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 15 states. [2020-08-18 22:02:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:54,501 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-08-18 22:02:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 22:02:54,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-08-18 22:02:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:54,504 INFO L225 Difference]: With dead ends: 111 [2020-08-18 22:02:54,504 INFO L226 Difference]: Without dead ends: 109 [2020-08-18 22:02:54,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-18 22:02:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-18 22:02:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-08-18 22:02:54,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 22:02:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-08-18 22:02:54,517 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 109 [2020-08-18 22:02:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:54,518 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-08-18 22:02:54,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 22:02:54,518 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-08-18 22:02:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-18 22:02:54,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:54,520 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:54,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 22:02:54,521 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:54,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1711037612, now seen corresponding path program 15 times [2020-08-18 22:02:54,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:54,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566175000] [2020-08-18 22:02:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 22:02:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:02:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:02:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:02:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:02:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:02:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:02:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:02:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:02:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:02:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:02:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 264 proven. 110 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-18 22:02:54,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566175000] [2020-08-18 22:02:54,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:54,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 22:02:54,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146313587] [2020-08-18 22:02:54,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 22:02:54,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 22:02:54,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:02:54,904 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 25 states. [2020-08-18 22:02:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:55,390 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2020-08-18 22:02:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:02:55,390 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 125 [2020-08-18 22:02:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:55,392 INFO L225 Difference]: With dead ends: 211 [2020-08-18 22:02:55,392 INFO L226 Difference]: Without dead ends: 154 [2020-08-18 22:02:55,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-08-18 22:02:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-18 22:02:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2020-08-18 22:02:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-18 22:02:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-08-18 22:02:55,401 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 125 [2020-08-18 22:02:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:55,401 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-08-18 22:02:55,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 22:02:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-08-18 22:02:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 22:02:55,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:55,403 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:55,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 22:02:55,404 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash 66724049, now seen corresponding path program 16 times [2020-08-18 22:02:55,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:55,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052398574] [2020-08-18 22:02:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 22:02:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:02:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 22:02:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 22:02:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:02:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:02:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 22:02:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:02:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 22:02:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 22:02:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-18 22:02:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 264 proven. 132 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-18 22:02:55,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052398574] [2020-08-18 22:02:55,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:55,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 22:02:55,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83989073] [2020-08-18 22:02:55,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 22:02:55,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 22:02:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:02:55,933 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 26 states. [2020-08-18 22:02:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:56,512 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2020-08-18 22:02:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 22:02:56,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-08-18 22:02:56,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:56,517 INFO L225 Difference]: With dead ends: 215 [2020-08-18 22:02:56,517 INFO L226 Difference]: Without dead ends: 160 [2020-08-18 22:02:56,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 22:02:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-18 22:02:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-08-18 22:02:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-18 22:02:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-08-18 22:02:56,534 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 127 [2020-08-18 22:02:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:56,535 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-08-18 22:02:56,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 22:02:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-08-18 22:02:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-08-18 22:02:56,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:56,538 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:56,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 22:02:56,539 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:56,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:56,539 INFO L82 PathProgramCache]: Analyzing trace with hash 429354934, now seen corresponding path program 17 times [2020-08-18 22:02:56,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:56,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77869432] [2020-08-18 22:02:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:02:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:02:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:02:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:02:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:02:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:02:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:02:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:02:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:02:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:02:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:02:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 178 proven. 242 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-18 22:02:56,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77869432] [2020-08-18 22:02:56,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:56,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 22:02:56,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124904842] [2020-08-18 22:02:56,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 22:02:56,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:56,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 22:02:56,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:02:56,826 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 17 states. [2020-08-18 22:02:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:56,984 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2020-08-18 22:02:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 22:02:56,984 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2020-08-18 22:02:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:56,986 INFO L225 Difference]: With dead ends: 127 [2020-08-18 22:02:56,986 INFO L226 Difference]: Without dead ends: 125 [2020-08-18 22:02:56,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-08-18 22:02:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-08-18 22:02:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-08-18 22:02:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 22:02:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-08-18 22:02:56,998 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 129 [2020-08-18 22:02:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:56,999 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-08-18 22:02:56,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 22:02:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-08-18 22:02:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-18 22:02:57,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:57,002 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:57,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 22:02:57,003 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:57,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:57,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1971086744, now seen corresponding path program 18 times [2020-08-18 22:02:57,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:57,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109344965] [2020-08-18 22:02:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 22:02:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:02:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:02:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:02:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:02:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:02:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:02:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:02:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:02:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:02:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:02:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:02:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:02:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 364 proven. 156 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-18 22:02:57,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109344965] [2020-08-18 22:02:57,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:57,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 22:02:57,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865556572] [2020-08-18 22:02:57,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 22:02:57,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 22:02:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-08-18 22:02:57,544 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 29 states. [2020-08-18 22:02:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:58,111 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2020-08-18 22:02:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 22:02:58,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 145 [2020-08-18 22:02:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:58,113 INFO L225 Difference]: With dead ends: 243 [2020-08-18 22:02:58,113 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 22:02:58,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1212, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 22:02:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 22:02:58,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2020-08-18 22:02:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 22:02:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-08-18 22:02:58,130 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 145 [2020-08-18 22:02:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:58,131 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-08-18 22:02:58,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 22:02:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-08-18 22:02:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-08-18 22:02:58,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:58,133 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:58,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 22:02:58,133 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:58,133 INFO L82 PathProgramCache]: Analyzing trace with hash 554411325, now seen corresponding path program 19 times [2020-08-18 22:02:58,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:58,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202785117] [2020-08-18 22:02:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 22:02:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 22:02:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:02:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 22:02:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:02:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:02:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 22:02:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 22:02:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-18 22:02:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 22:02:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-18 22:02:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 22:02:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-18 22:02:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 364 proven. 182 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-18 22:02:58,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202785117] [2020-08-18 22:02:58,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:58,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 22:02:58,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94444669] [2020-08-18 22:02:58,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 22:02:58,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 22:02:58,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:02:58,648 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 30 states. [2020-08-18 22:02:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:59,228 INFO L93 Difference]: Finished difference Result 247 states and 298 transitions. [2020-08-18 22:02:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 22:02:59,228 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-08-18 22:02:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:59,230 INFO L225 Difference]: With dead ends: 247 [2020-08-18 22:02:59,230 INFO L226 Difference]: Without dead ends: 184 [2020-08-18 22:02:59,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1324, Unknown=0, NotChecked=0, Total=1892 [2020-08-18 22:02:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-08-18 22:02:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 128. [2020-08-18 22:02:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-08-18 22:02:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2020-08-18 22:02:59,240 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 147 [2020-08-18 22:02:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:59,240 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2020-08-18 22:02:59,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 22:02:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2020-08-18 22:02:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-18 22:02:59,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:59,242 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:59,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 22:02:59,243 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:59,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:59,243 INFO L82 PathProgramCache]: Analyzing trace with hash 633966498, now seen corresponding path program 20 times [2020-08-18 22:02:59,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:59,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049520454] [2020-08-18 22:02:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:02:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:02:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:02:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:02:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:02:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:02:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:02:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:02:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:02:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:02:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:02:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:02:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:02:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 236 proven. 338 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-18 22:02:59,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049520454] [2020-08-18 22:02:59,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:59,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 22:02:59,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289356150] [2020-08-18 22:02:59,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 22:02:59,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 22:02:59,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 22:02:59,531 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand 19 states. [2020-08-18 22:02:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:59,703 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-08-18 22:02:59,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 22:02:59,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 149 [2020-08-18 22:02:59,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:59,705 INFO L225 Difference]: With dead ends: 143 [2020-08-18 22:02:59,705 INFO L226 Difference]: Without dead ends: 141 [2020-08-18 22:02:59,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2020-08-18 22:02:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-08-18 22:02:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-08-18 22:02:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 22:02:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2020-08-18 22:02:59,714 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 149 [2020-08-18 22:02:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:59,715 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2020-08-18 22:02:59,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 22:02:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2020-08-18 22:02:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-08-18 22:02:59,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:59,717 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:59,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 22:02:59,718 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:59,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:59,718 INFO L82 PathProgramCache]: Analyzing trace with hash -869716604, now seen corresponding path program 21 times [2020-08-18 22:02:59,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:59,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566524965] [2020-08-18 22:02:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 22:03:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:03:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:03:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:03:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:03:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:03:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:03:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:03:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:03:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:03:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:03:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:03:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:03:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 22:03:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 22:03:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 480 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-18 22:03:00,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566524965] [2020-08-18 22:03:00,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:00,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 22:03:00,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475584296] [2020-08-18 22:03:00,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 22:03:00,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 22:03:00,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 22:03:00,357 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 33 states. [2020-08-18 22:03:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:01,047 INFO L93 Difference]: Finished difference Result 275 states and 330 transitions. [2020-08-18 22:03:01,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 22:03:01,048 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 165 [2020-08-18 22:03:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:01,050 INFO L225 Difference]: With dead ends: 275 [2020-08-18 22:03:01,050 INFO L226 Difference]: Without dead ends: 202 [2020-08-18 22:03:01,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-08-18 22:03:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-18 22:03:01,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 142. [2020-08-18 22:03:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-08-18 22:03:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 152 transitions. [2020-08-18 22:03:01,068 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 152 transitions. Word has length 165 [2020-08-18 22:03:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:01,068 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 152 transitions. [2020-08-18 22:03:01,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 22:03:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 152 transitions. [2020-08-18 22:03:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-08-18 22:03:01,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:01,072 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:01,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 22:03:01,072 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:01,073 INFO L82 PathProgramCache]: Analyzing trace with hash -583456599, now seen corresponding path program 22 times [2020-08-18 22:03:01,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:01,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563011150] [2020-08-18 22:03:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 22:03:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 22:03:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 22:03:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:03:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:03:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 22:03:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:03:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 22:03:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 22:03:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-18 22:03:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 22:03:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 22:03:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 22:03:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 22:03:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-18 22:03:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 480 proven. 240 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-18 22:03:01,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563011150] [2020-08-18 22:03:01,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:01,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-18 22:03:01,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904225382] [2020-08-18 22:03:01,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-18 22:03:01,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-18 22:03:01,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 22:03:01,777 INFO L87 Difference]: Start difference. First operand 142 states and 152 transitions. Second operand 34 states. [2020-08-18 22:03:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:02,433 INFO L93 Difference]: Finished difference Result 279 states and 337 transitions. [2020-08-18 22:03:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 22:03:02,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-08-18 22:03:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:02,435 INFO L225 Difference]: With dead ends: 279 [2020-08-18 22:03:02,435 INFO L226 Difference]: Without dead ends: 208 [2020-08-18 22:03:02,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=729, Invalid=1721, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 22:03:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-18 22:03:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 144. [2020-08-18 22:03:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 22:03:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-08-18 22:03:02,449 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 167 [2020-08-18 22:03:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:02,450 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-08-18 22:03:02,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-18 22:03:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-08-18 22:03:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-18 22:03:02,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:02,452 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:02,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 22:03:02,453 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:02,453 INFO L82 PathProgramCache]: Analyzing trace with hash -365498738, now seen corresponding path program 23 times [2020-08-18 22:03:02,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:02,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267980888] [2020-08-18 22:03:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:03:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:03:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:03:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1172 backedges. 302 proven. 450 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-08-18 22:03:02,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267980888] [2020-08-18 22:03:02,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:02,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 22:03:02,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8244207] [2020-08-18 22:03:02,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 22:03:02,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 22:03:02,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 22:03:02,798 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 21 states. [2020-08-18 22:03:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:02,980 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-08-18 22:03:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 22:03:02,980 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 169 [2020-08-18 22:03:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:02,982 INFO L225 Difference]: With dead ends: 159 [2020-08-18 22:03:02,982 INFO L226 Difference]: Without dead ends: 157 [2020-08-18 22:03:02,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2020-08-18 22:03:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-08-18 22:03:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-08-18 22:03:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 22:03:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 167 transitions. [2020-08-18 22:03:02,993 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 167 transitions. Word has length 169 [2020-08-18 22:03:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:02,994 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 167 transitions. [2020-08-18 22:03:02,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 22:03:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 167 transitions. [2020-08-18 22:03:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-18 22:03:02,996 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:02,996 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:02,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 22:03:02,997 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash -760007568, now seen corresponding path program 24 times [2020-08-18 22:03:02,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:02,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177660845] [2020-08-18 22:03:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 22:03:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:03:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:03:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-18 22:03:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 22:03:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 612 proven. 272 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-18 22:03:03,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177660845] [2020-08-18 22:03:03,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:03,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-18 22:03:03,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799856821] [2020-08-18 22:03:03,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-18 22:03:03,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-18 22:03:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-08-18 22:03:03,703 INFO L87 Difference]: Start difference. First operand 156 states and 167 transitions. Second operand 37 states. [2020-08-18 22:03:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:04,500 INFO L93 Difference]: Finished difference Result 307 states and 369 transitions. [2020-08-18 22:03:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-18 22:03:04,500 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 185 [2020-08-18 22:03:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:04,502 INFO L225 Difference]: With dead ends: 307 [2020-08-18 22:03:04,502 INFO L226 Difference]: Without dead ends: 226 [2020-08-18 22:03:04,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=836, Invalid=2026, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 22:03:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-18 22:03:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 158. [2020-08-18 22:03:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-08-18 22:03:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2020-08-18 22:03:04,527 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 185 [2020-08-18 22:03:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:04,527 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2020-08-18 22:03:04,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-18 22:03:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2020-08-18 22:03:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-08-18 22:03:04,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:04,530 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:04,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 22:03:04,530 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:04,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1861014763, now seen corresponding path program 25 times [2020-08-18 22:03:04,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:04,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882064254] [2020-08-18 22:03:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 22:03:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:03:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 22:03:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:03:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:03:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 22:03:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 22:03:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-18 22:03:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 22:03:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-18 22:03:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 22:03:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-18 22:03:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-18 22:03:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 22:03:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-18 22:03:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 22:03:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 22:03:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1462 backedges. 612 proven. 306 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-18 22:03:05,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882064254] [2020-08-18 22:03:05,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:05,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-18 22:03:05,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489279339] [2020-08-18 22:03:05,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-18 22:03:05,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-18 22:03:05,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2020-08-18 22:03:05,336 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand 38 states. [2020-08-18 22:03:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:06,247 INFO L93 Difference]: Finished difference Result 311 states and 376 transitions. [2020-08-18 22:03:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-18 22:03:06,247 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-08-18 22:03:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:06,249 INFO L225 Difference]: With dead ends: 311 [2020-08-18 22:03:06,249 INFO L226 Difference]: Without dead ends: 232 [2020-08-18 22:03:06,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=910, Invalid=2170, Unknown=0, NotChecked=0, Total=3080 [2020-08-18 22:03:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-18 22:03:06,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2020-08-18 22:03:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 22:03:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2020-08-18 22:03:06,262 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 187 [2020-08-18 22:03:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:06,262 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2020-08-18 22:03:06,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-18 22:03:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2020-08-18 22:03:06,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-08-18 22:03:06,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:06,264 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:06,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 22:03:06,264 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash 927992954, now seen corresponding path program 26 times [2020-08-18 22:03:06,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:06,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051077509] [2020-08-18 22:03:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:03:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:03:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:03:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:03:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:03:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:03:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:03:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:03:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:03:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:03:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:03:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:03:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 22:03:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 22:03:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 22:03:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-18 22:03:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-18 22:03:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 376 proven. 578 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-08-18 22:03:06,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051077509] [2020-08-18 22:03:06,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:06,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 22:03:06,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477969843] [2020-08-18 22:03:06,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 22:03:06,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:06,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 22:03:06,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 22:03:06,648 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand 23 states. [2020-08-18 22:03:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:06,874 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2020-08-18 22:03:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 22:03:06,874 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 189 [2020-08-18 22:03:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:06,876 INFO L225 Difference]: With dead ends: 175 [2020-08-18 22:03:06,876 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 22:03:06,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-08-18 22:03:06,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 22:03:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-08-18 22:03:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-08-18 22:03:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 184 transitions. [2020-08-18 22:03:06,890 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 184 transitions. Word has length 189 [2020-08-18 22:03:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:06,890 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 184 transitions. [2020-08-18 22:03:06,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 22:03:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 184 transitions. [2020-08-18 22:03:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-18 22:03:06,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:06,893 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:06,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 22:03:06,894 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:06,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1753938524, now seen corresponding path program 27 times [2020-08-18 22:03:06,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:06,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173193773] [2020-08-18 22:03:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 22:03:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:03:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:03:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:03:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:03:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:03:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:03:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:03:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:03:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:03:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:03:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:03:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 22:03:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 22:03:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 22:03:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-18 22:03:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-18 22:03:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-18 22:03:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-18 22:03:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 760 proven. 342 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-18 22:03:07,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173193773] [2020-08-18 22:03:07,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:07,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-18 22:03:07,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605952340] [2020-08-18 22:03:07,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-18 22:03:07,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:07,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-18 22:03:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-08-18 22:03:07,744 INFO L87 Difference]: Start difference. First operand 172 states and 184 transitions. Second operand 41 states. [2020-08-18 22:03:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:08,643 INFO L93 Difference]: Finished difference Result 339 states and 408 transitions. [2020-08-18 22:03:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-18 22:03:08,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 205 [2020-08-18 22:03:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:08,645 INFO L225 Difference]: With dead ends: 339 [2020-08-18 22:03:08,645 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 22:03:08,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1029, Invalid=2511, Unknown=0, NotChecked=0, Total=3540 [2020-08-18 22:03:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 22:03:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 174. [2020-08-18 22:03:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 22:03:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 186 transitions. [2020-08-18 22:03:08,658 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 186 transitions. Word has length 205 [2020-08-18 22:03:08,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:08,658 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 186 transitions. [2020-08-18 22:03:08,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-18 22:03:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 186 transitions. [2020-08-18 22:03:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-08-18 22:03:08,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:08,660 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:08,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 22:03:08,660 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1542073473, now seen corresponding path program 28 times [2020-08-18 22:03:08,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:08,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371405295] [2020-08-18 22:03:08,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 22:03:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 22:03:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:03:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:03:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 22:03:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:03:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 22:03:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 22:03:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-18 22:03:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 22:03:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 22:03:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 22:03:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 22:03:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-18 22:03:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-18 22:03:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-18 22:03:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-18 22:03:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-18 22:03:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 22:03:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 760 proven. 380 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-18 22:03:09,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371405295] [2020-08-18 22:03:09,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:09,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-18 22:03:09,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529375737] [2020-08-18 22:03:09,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-18 22:03:09,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:09,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-18 22:03:09,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-08-18 22:03:09,519 INFO L87 Difference]: Start difference. First operand 174 states and 186 transitions. Second operand 42 states. [2020-08-18 22:03:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:10,601 INFO L93 Difference]: Finished difference Result 343 states and 415 transitions. [2020-08-18 22:03:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-18 22:03:10,602 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-08-18 22:03:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:10,604 INFO L225 Difference]: With dead ends: 343 [2020-08-18 22:03:10,605 INFO L226 Difference]: Without dead ends: 256 [2020-08-18 22:03:10,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1111, Invalid=2671, Unknown=0, NotChecked=0, Total=3782 [2020-08-18 22:03:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-18 22:03:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2020-08-18 22:03:10,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-18 22:03:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2020-08-18 22:03:10,626 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 207 [2020-08-18 22:03:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:10,627 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2020-08-18 22:03:10,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-18 22:03:10,627 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2020-08-18 22:03:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-08-18 22:03:10,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:10,628 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:10,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 22:03:10,629 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash -196777626, now seen corresponding path program 29 times [2020-08-18 22:03:10,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:10,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572900690] [2020-08-18 22:03:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:03:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:03:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-18 22:03:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 22:03:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 22:03:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-18 22:03:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-18 22:03:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 458 proven. 722 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-08-18 22:03:11,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572900690] [2020-08-18 22:03:11,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:11,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 22:03:11,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923715039] [2020-08-18 22:03:11,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 22:03:11,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 22:03:11,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 22:03:11,134 INFO L87 Difference]: Start difference. First operand 176 states and 188 transitions. Second operand 25 states. [2020-08-18 22:03:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:11,389 INFO L93 Difference]: Finished difference Result 191 states and 204 transitions. [2020-08-18 22:03:11,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 22:03:11,389 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 209 [2020-08-18 22:03:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:11,391 INFO L225 Difference]: With dead ends: 191 [2020-08-18 22:03:11,391 INFO L226 Difference]: Without dead ends: 189 [2020-08-18 22:03:11,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2020-08-18 22:03:11,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-18 22:03:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2020-08-18 22:03:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 22:03:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 201 transitions. [2020-08-18 22:03:11,405 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 201 transitions. Word has length 209 [2020-08-18 22:03:11,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:11,406 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 201 transitions. [2020-08-18 22:03:11,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 22:03:11,406 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 201 transitions. [2020-08-18 22:03:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-18 22:03:11,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:11,408 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:11,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 22:03:11,408 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash 65077064, now seen corresponding path program 30 times [2020-08-18 22:03:11,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:11,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244543901] [2020-08-18 22:03:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 22:03:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:03:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-18 22:03:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 22:03:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 22:03:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-18 22:03:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-18 22:03:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-18 22:03:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-18 22:03:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 924 proven. 420 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-18 22:03:12,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244543901] [2020-08-18 22:03:12,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:12,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-18 22:03:12,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371044691] [2020-08-18 22:03:12,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-18 22:03:12,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-18 22:03:12,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-08-18 22:03:12,383 INFO L87 Difference]: Start difference. First operand 188 states and 201 transitions. Second operand 45 states. [2020-08-18 22:03:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:13,416 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-18 22:03:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-18 22:03:13,416 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 225 [2020-08-18 22:03:13,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:13,419 INFO L225 Difference]: With dead ends: 371 [2020-08-18 22:03:13,419 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 22:03:13,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1242, Invalid=3048, Unknown=0, NotChecked=0, Total=4290 [2020-08-18 22:03:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 22:03:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 190. [2020-08-18 22:03:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-08-18 22:03:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 203 transitions. [2020-08-18 22:03:13,432 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 203 transitions. Word has length 225 [2020-08-18 22:03:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:13,433 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 203 transitions. [2020-08-18 22:03:13,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-18 22:03:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 203 transitions. [2020-08-18 22:03:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-18 22:03:13,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:13,435 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:13,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 22:03:13,435 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:13,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:13,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1137618157, now seen corresponding path program 31 times [2020-08-18 22:03:13,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:13,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144202745] [2020-08-18 22:03:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 22:03:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 22:03:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:03:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:03:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 22:03:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 22:03:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-18 22:03:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 22:03:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-18 22:03:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 22:03:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-18 22:03:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-18 22:03:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 22:03:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-18 22:03:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 22:03:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 22:03:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-18 22:03:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-08-18 22:03:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-18 22:03:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-18 22:03:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-08-18 22:03:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 924 proven. 462 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-18 22:03:14,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144202745] [2020-08-18 22:03:14,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:14,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-18 22:03:14,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420922949] [2020-08-18 22:03:14,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-18 22:03:14,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-18 22:03:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2020-08-18 22:03:14,472 INFO L87 Difference]: Start difference. First operand 190 states and 203 transitions. Second operand 46 states. [2020-08-18 22:03:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:15,611 INFO L93 Difference]: Finished difference Result 375 states and 454 transitions. [2020-08-18 22:03:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-18 22:03:15,611 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 227 [2020-08-18 22:03:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:15,613 INFO L225 Difference]: With dead ends: 375 [2020-08-18 22:03:15,614 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 22:03:15,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1332, Invalid=3224, Unknown=0, NotChecked=0, Total=4556 [2020-08-18 22:03:15,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 22:03:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 192. [2020-08-18 22:03:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-18 22:03:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 205 transitions. [2020-08-18 22:03:15,626 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 205 transitions. Word has length 227 [2020-08-18 22:03:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:15,626 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 205 transitions. [2020-08-18 22:03:15,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-18 22:03:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 205 transitions. [2020-08-18 22:03:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-08-18 22:03:15,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:15,628 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:15,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 22:03:15,629 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1057457490, now seen corresponding path program 32 times [2020-08-18 22:03:15,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:15,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145188532] [2020-08-18 22:03:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:03:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:03:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:03:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:03:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:03:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:03:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:03:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:03:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:03:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:03:16,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:03:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 22:03:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 22:03:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 22:03:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-18 22:03:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-18 22:03:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-18 22:03:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-18 22:03:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-18 22:03:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 22:03:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-18 22:03:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 548 proven. 882 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-08-18 22:03:16,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145188532] [2020-08-18 22:03:16,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:16,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 22:03:16,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759020318] [2020-08-18 22:03:16,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 22:03:16,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:16,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 22:03:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 22:03:16,133 INFO L87 Difference]: Start difference. First operand 192 states and 205 transitions. Second operand 27 states. [2020-08-18 22:03:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:16,354 INFO L93 Difference]: Finished difference Result 207 states and 221 transitions. [2020-08-18 22:03:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 22:03:16,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 229 [2020-08-18 22:03:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:16,356 INFO L225 Difference]: With dead ends: 207 [2020-08-18 22:03:16,357 INFO L226 Difference]: Without dead ends: 205 [2020-08-18 22:03:16,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2020-08-18 22:03:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-18 22:03:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2020-08-18 22:03:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 22:03:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 218 transitions. [2020-08-18 22:03:16,368 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 218 transitions. Word has length 229 [2020-08-18 22:03:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:16,369 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 218 transitions. [2020-08-18 22:03:16,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 22:03:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 218 transitions. [2020-08-18 22:03:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-08-18 22:03:16,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:16,371 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:16,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 22:03:16,371 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:16,372 INFO L82 PathProgramCache]: Analyzing trace with hash -777665740, now seen corresponding path program 33 times [2020-08-18 22:03:16,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:16,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117178839] [2020-08-18 22:03:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 22:03:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:03:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:03:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:03:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:03:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:03:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:03:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:03:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:03:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:03:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:03:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 22:03:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 22:03:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 22:03:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-18 22:03:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-18 22:03:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-18 22:03:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-18 22:03:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-18 22:03:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 22:03:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-18 22:03:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-08-18 22:03:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-08-18 22:03:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 1104 proven. 506 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-18 22:03:17,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117178839] [2020-08-18 22:03:17,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:17,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-18 22:03:17,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381109250] [2020-08-18 22:03:17,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-18 22:03:17,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:17,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-18 22:03:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2020-08-18 22:03:17,533 INFO L87 Difference]: Start difference. First operand 204 states and 218 transitions. Second operand 49 states. [2020-08-18 22:03:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:18,875 INFO L93 Difference]: Finished difference Result 403 states and 486 transitions. [2020-08-18 22:03:18,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-18 22:03:18,876 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 245 [2020-08-18 22:03:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:18,878 INFO L225 Difference]: With dead ends: 403 [2020-08-18 22:03:18,878 INFO L226 Difference]: Without dead ends: 298 [2020-08-18 22:03:18,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1475, Invalid=3637, Unknown=0, NotChecked=0, Total=5112 [2020-08-18 22:03:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-18 22:03:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 206. [2020-08-18 22:03:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-18 22:03:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 220 transitions. [2020-08-18 22:03:18,891 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 220 transitions. Word has length 245 [2020-08-18 22:03:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:18,891 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 220 transitions. [2020-08-18 22:03:18,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-18 22:03:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 220 transitions. [2020-08-18 22:03:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-08-18 22:03:18,893 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:18,893 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:18,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 22:03:18,893 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1435577433, now seen corresponding path program 34 times [2020-08-18 22:03:18,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:18,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641296343] [2020-08-18 22:03:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 22:03:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:03:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:03:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 22:03:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:03:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 22:03:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 22:03:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-18 22:03:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 22:03:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 22:03:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 22:03:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 22:03:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-18 22:03:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-18 22:03:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-18 22:03:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-18 22:03:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-18 22:03:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 22:03:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 22:03:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-08-18 22:03:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-08-18 22:03:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:03:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-08-18 22:03:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2668 backedges. 1104 proven. 552 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-18 22:03:20,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641296343] [2020-08-18 22:03:20,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:20,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-18 22:03:20,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879415867] [2020-08-18 22:03:20,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-18 22:03:20,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-18 22:03:20,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2020-08-18 22:03:20,122 INFO L87 Difference]: Start difference. First operand 206 states and 220 transitions. Second operand 50 states. [2020-08-18 22:03:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:21,566 INFO L93 Difference]: Finished difference Result 407 states and 493 transitions. [2020-08-18 22:03:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-18 22:03:21,566 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 247 [2020-08-18 22:03:21,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:21,568 INFO L225 Difference]: With dead ends: 407 [2020-08-18 22:03:21,569 INFO L226 Difference]: Without dead ends: 304 [2020-08-18 22:03:21,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1573, Invalid=3829, Unknown=0, NotChecked=0, Total=5402 [2020-08-18 22:03:21,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-18 22:03:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 208. [2020-08-18 22:03:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-18 22:03:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 222 transitions. [2020-08-18 22:03:21,583 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 222 transitions. Word has length 247 [2020-08-18 22:03:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:21,583 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 222 transitions. [2020-08-18 22:03:21,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-18 22:03:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 222 transitions. [2020-08-18 22:03:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-08-18 22:03:21,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:21,593 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:21,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 22:03:21,593 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:21,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1941512130, now seen corresponding path program 35 times [2020-08-18 22:03:21,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:21,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519308678] [2020-08-18 22:03:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:03:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-18 22:03:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 22:03:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 22:03:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-18 22:03:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-18 22:03:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-18 22:03:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-18 22:03:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-18 22:03:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 22:03:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 22:03:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2716 backedges. 646 proven. 1058 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-08-18 22:03:22,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519308678] [2020-08-18 22:03:22,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:22,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 22:03:22,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615640368] [2020-08-18 22:03:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 22:03:22,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 22:03:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 22:03:22,160 INFO L87 Difference]: Start difference. First operand 208 states and 222 transitions. Second operand 29 states. [2020-08-18 22:03:22,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:22,427 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2020-08-18 22:03:22,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 22:03:22,428 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 249 [2020-08-18 22:03:22,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:22,430 INFO L225 Difference]: With dead ends: 223 [2020-08-18 22:03:22,430 INFO L226 Difference]: Without dead ends: 221 [2020-08-18 22:03:22,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2020-08-18 22:03:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-08-18 22:03:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-08-18 22:03:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-08-18 22:03:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 235 transitions. [2020-08-18 22:03:22,446 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 235 transitions. Word has length 249 [2020-08-18 22:03:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:22,447 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 235 transitions. [2020-08-18 22:03:22,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 22:03:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 235 transitions. [2020-08-18 22:03:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-18 22:03:22,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:22,449 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:22,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 22:03:22,449 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:22,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:22,450 INFO L82 PathProgramCache]: Analyzing trace with hash -712391136, now seen corresponding path program 36 times [2020-08-18 22:03:22,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:22,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059427443] [2020-08-18 22:03:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 22:03:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-18 22:03:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 22:03:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 22:03:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-18 22:03:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-18 22:03:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-18 22:03:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-18 22:03:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-18 22:03:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 22:03:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 22:03:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-08-18 22:03:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-08-18 22:03:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 1300 proven. 600 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-18 22:03:23,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059427443] [2020-08-18 22:03:23,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:23,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-18 22:03:23,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322460635] [2020-08-18 22:03:23,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-18 22:03:23,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:23,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-18 22:03:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=2028, Unknown=0, NotChecked=0, Total=2756 [2020-08-18 22:03:23,807 INFO L87 Difference]: Start difference. First operand 220 states and 235 transitions. Second operand 53 states. [2020-08-18 22:03:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:25,325 INFO L93 Difference]: Finished difference Result 435 states and 525 transitions. [2020-08-18 22:03:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-08-18 22:03:25,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 265 [2020-08-18 22:03:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:25,327 INFO L225 Difference]: With dead ends: 435 [2020-08-18 22:03:25,327 INFO L226 Difference]: Without dead ends: 322 [2020-08-18 22:03:25,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1728, Invalid=4278, Unknown=0, NotChecked=0, Total=6006 [2020-08-18 22:03:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-08-18 22:03:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 222. [2020-08-18 22:03:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-18 22:03:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 237 transitions. [2020-08-18 22:03:25,341 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 237 transitions. Word has length 265 [2020-08-18 22:03:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:25,341 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 237 transitions. [2020-08-18 22:03:25,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-18 22:03:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 237 transitions. [2020-08-18 22:03:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-08-18 22:03:25,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:25,343 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:25,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 22:03:25,343 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:25,344 INFO L82 PathProgramCache]: Analyzing trace with hash -993908027, now seen corresponding path program 37 times [2020-08-18 22:03:25,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:25,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149557821] [2020-08-18 22:03:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 22:03:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 22:03:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 22:03:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 22:03:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 22:03:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-18 22:03:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-18 22:03:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-08-18 22:03:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-18 22:03:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-08-18 22:03:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-18 22:03:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-18 22:03:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-18 22:03:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-08-18 22:03:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 22:03:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-18 22:03:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2020-08-18 22:03:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-18 22:03:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-08-18 22:03:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2020-08-18 22:03:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-08-18 22:03:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-08-18 22:03:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2020-08-18 22:03:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-18 22:03:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2020-08-18 22:03:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 1300 proven. 650 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-18 22:03:26,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149557821] [2020-08-18 22:03:26,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:26,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-18 22:03:26,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696348287] [2020-08-18 22:03:26,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-18 22:03:26,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-18 22:03:26,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2020-08-18 22:03:26,811 INFO L87 Difference]: Start difference. First operand 222 states and 237 transitions. Second operand 54 states. [2020-08-18 22:03:28,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:28,445 INFO L93 Difference]: Finished difference Result 439 states and 532 transitions. [2020-08-18 22:03:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-08-18 22:03:28,445 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 267 [2020-08-18 22:03:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:28,448 INFO L225 Difference]: With dead ends: 439 [2020-08-18 22:03:28,448 INFO L226 Difference]: Without dead ends: 328 [2020-08-18 22:03:28,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1834, Invalid=4486, Unknown=0, NotChecked=0, Total=6320 [2020-08-18 22:03:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-18 22:03:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 224. [2020-08-18 22:03:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-08-18 22:03:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 239 transitions. [2020-08-18 22:03:28,462 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 239 transitions. Word has length 267 [2020-08-18 22:03:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:28,462 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 239 transitions. [2020-08-18 22:03:28,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-18 22:03:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 239 transitions. [2020-08-18 22:03:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-08-18 22:03:28,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:28,465 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:28,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 22:03:28,465 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash -948700630, now seen corresponding path program 38 times [2020-08-18 22:03:28,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:28,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651665105] [2020-08-18 22:03:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:03:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:03:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:03:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:03:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:03:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:03:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:03:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:03:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:03:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:03:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 22:03:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 22:03:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 22:03:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-18 22:03:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-18 22:03:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-18 22:03:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-18 22:03:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-18 22:03:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 22:03:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-18 22:03:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-08-18 22:03:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-08-18 22:03:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-08-18 22:03:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-08-18 22:03:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-18 22:03:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 752 proven. 1250 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-08-18 22:03:29,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651665105] [2020-08-18 22:03:29,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:29,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 22:03:29,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517732575] [2020-08-18 22:03:29,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 22:03:29,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 22:03:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-18 22:03:29,133 INFO L87 Difference]: Start difference. First operand 224 states and 239 transitions. Second operand 31 states. [2020-08-18 22:03:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:29,419 INFO L93 Difference]: Finished difference Result 239 states and 255 transitions. [2020-08-18 22:03:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 22:03:29,419 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 269 [2020-08-18 22:03:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:29,421 INFO L225 Difference]: With dead ends: 239 [2020-08-18 22:03:29,421 INFO L226 Difference]: Without dead ends: 237 [2020-08-18 22:03:29,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2020-08-18 22:03:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-18 22:03:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2020-08-18 22:03:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-18 22:03:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 252 transitions. [2020-08-18 22:03:29,436 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 252 transitions. Word has length 269 [2020-08-18 22:03:29,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:29,438 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 252 transitions. [2020-08-18 22:03:29,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 22:03:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 252 transitions. [2020-08-18 22:03:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-08-18 22:03:29,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:29,440 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:29,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 22:03:29,441 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash 167610380, now seen corresponding path program 39 times [2020-08-18 22:03:29,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:29,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234190995] [2020-08-18 22:03:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 22:03:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 22:03:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 22:03:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 22:03:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 22:03:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 22:03:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-18 22:03:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-18 22:03:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2020-08-18 22:03:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-18 22:03:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-08-18 22:03:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-18 22:03:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-18 22:03:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-18 22:03:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-08-18 22:03:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2020-08-18 22:03:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2020-08-18 22:03:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2020-08-18 22:03:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-18 22:03:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-08-18 22:03:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2020-08-18 22:03:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2020-08-18 22:03:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2020-08-18 22:03:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-08-18 22:03:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2020-08-18 22:03:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2020-08-18 22:03:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:30,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2020-08-18 22:03:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3618 backedges. 1512 proven. 702 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-18 22:03:31,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234190995] [2020-08-18 22:03:31,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:31,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-18 22:03:31,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516857118] [2020-08-18 22:03:31,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-18 22:03:31,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:31,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-18 22:03:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-08-18 22:03:31,021 INFO L87 Difference]: Start difference. First operand 236 states and 252 transitions. Second operand 57 states. [2020-08-18 22:03:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:32,806 INFO L93 Difference]: Finished difference Result 467 states and 564 transitions. [2020-08-18 22:03:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-18 22:03:32,807 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 285 [2020-08-18 22:03:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:32,809 INFO L225 Difference]: With dead ends: 467 [2020-08-18 22:03:32,809 INFO L226 Difference]: Without dead ends: 346 [2020-08-18 22:03:32,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2001, Invalid=4971, Unknown=0, NotChecked=0, Total=6972 [2020-08-18 22:03:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-18 22:03:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 238. [2020-08-18 22:03:32,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-08-18 22:03:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 254 transitions. [2020-08-18 22:03:32,823 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 254 transitions. Word has length 285 [2020-08-18 22:03:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:32,824 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 254 transitions. [2020-08-18 22:03:32,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-18 22:03:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 254 transitions. [2020-08-18 22:03:32,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-08-18 22:03:32,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:32,826 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:32,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 22:03:32,826 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash 196225073, now seen corresponding path program 40 times [2020-08-18 22:03:32,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:32,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773079246] [2020-08-18 22:03:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 22:03:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 22:03:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 22:03:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 22:03:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 22:03:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 22:03:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-08-18 22:03:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-18 22:03:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-18 22:03:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2020-08-18 22:03:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-18 22:03:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2020-08-18 22:03:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-18 22:03:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-18 22:03:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-18 22:03:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-18 22:03:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-08-18 22:03:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-18 22:03:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2020-08-18 22:03:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2020-08-18 22:03:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 22:03:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2020-08-18 22:03:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2020-08-18 22:03:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2020-08-18 22:03:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2020-08-18 22:03:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 267 [2020-08-18 22:03:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2020-08-18 22:03:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3672 backedges. 1512 proven. 756 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-18 22:03:34,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773079246] [2020-08-18 22:03:34,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:34,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-08-18 22:03:34,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363965632] [2020-08-18 22:03:34,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-18 22:03:34,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-18 22:03:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2020-08-18 22:03:34,542 INFO L87 Difference]: Start difference. First operand 238 states and 254 transitions. Second operand 58 states. [2020-08-18 22:03:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:36,540 INFO L93 Difference]: Finished difference Result 471 states and 571 transitions. [2020-08-18 22:03:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-08-18 22:03:36,540 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 287 [2020-08-18 22:03:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:36,542 INFO L225 Difference]: With dead ends: 471 [2020-08-18 22:03:36,542 INFO L226 Difference]: Without dead ends: 352 [2020-08-18 22:03:36,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2115, Invalid=5195, Unknown=0, NotChecked=0, Total=7310 [2020-08-18 22:03:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-08-18 22:03:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 240. [2020-08-18 22:03:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-18 22:03:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 256 transitions. [2020-08-18 22:03:36,557 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 256 transitions. Word has length 287 [2020-08-18 22:03:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:36,557 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 256 transitions. [2020-08-18 22:03:36,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-18 22:03:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 256 transitions. [2020-08-18 22:03:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-08-18 22:03:36,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:36,560 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:36,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 22:03:36,560 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:36,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:36,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1925141270, now seen corresponding path program 41 times [2020-08-18 22:03:36,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:36,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095706859] [2020-08-18 22:03:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-18 22:03:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 22:03:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 22:03:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-18 22:03:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-18 22:03:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-18 22:03:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-18 22:03:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-18 22:03:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 22:03:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 22:03:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-08-18 22:03:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-08-18 22:03:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2020-08-18 22:03:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2020-08-18 22:03:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-08-18 22:03:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3728 backedges. 866 proven. 1458 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-08-18 22:03:37,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095706859] [2020-08-18 22:03:37,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:37,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-18 22:03:37,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627675502] [2020-08-18 22:03:37,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-18 22:03:37,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:37,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-18 22:03:37,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 22:03:37,329 INFO L87 Difference]: Start difference. First operand 240 states and 256 transitions. Second operand 33 states. [2020-08-18 22:03:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:37,698 INFO L93 Difference]: Finished difference Result 255 states and 272 transitions. [2020-08-18 22:03:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 22:03:37,699 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 289 [2020-08-18 22:03:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:37,700 INFO L225 Difference]: With dead ends: 255 [2020-08-18 22:03:37,700 INFO L226 Difference]: Without dead ends: 253 [2020-08-18 22:03:37,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 22:03:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-08-18 22:03:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2020-08-18 22:03:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-18 22:03:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 269 transitions. [2020-08-18 22:03:37,714 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 269 transitions. Word has length 289 [2020-08-18 22:03:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:37,715 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 269 transitions. [2020-08-18 22:03:37,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-18 22:03:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 269 transitions. [2020-08-18 22:03:37,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-08-18 22:03:37,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:37,717 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:37,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 22:03:37,718 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:37,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2144237320, now seen corresponding path program 42 times [2020-08-18 22:03:37,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:37,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767827569] [2020-08-18 22:03:37,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 22:03:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 22:03:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 22:03:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 22:03:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 22:03:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-08-18 22:03:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 22:03:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2020-08-18 22:03:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-18 22:03:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-18 22:03:39,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2020-08-18 22:03:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-08-18 22:03:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2020-08-18 22:03:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-18 22:03:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-08-18 22:03:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-18 22:03:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-08-18 22:03:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2020-08-18 22:03:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2020-08-18 22:03:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2020-08-18 22:03:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 22:03:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2020-08-18 22:03:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2020-08-18 22:03:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2020-08-18 22:03:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2020-08-18 22:03:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2020-08-18 22:03:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2020-08-18 22:03:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2020-08-18 22:03:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2020-08-18 22:03:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4176 backedges. 1740 proven. 812 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-08-18 22:03:39,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767827569] [2020-08-18 22:03:39,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:39,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-18 22:03:39,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709533699] [2020-08-18 22:03:39,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-18 22:03:39,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-18 22:03:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=2700, Unknown=0, NotChecked=0, Total=3660 [2020-08-18 22:03:39,637 INFO L87 Difference]: Start difference. First operand 252 states and 269 transitions. Second operand 61 states. [2020-08-18 22:03:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:41,777 INFO L93 Difference]: Finished difference Result 499 states and 603 transitions. [2020-08-18 22:03:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-08-18 22:03:41,777 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 305 [2020-08-18 22:03:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:41,779 INFO L225 Difference]: With dead ends: 499 [2020-08-18 22:03:41,779 INFO L226 Difference]: Without dead ends: 370 [2020-08-18 22:03:41,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2294, Invalid=5716, Unknown=0, NotChecked=0, Total=8010 [2020-08-18 22:03:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-08-18 22:03:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 254. [2020-08-18 22:03:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-08-18 22:03:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 271 transitions. [2020-08-18 22:03:41,794 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 271 transitions. Word has length 305 [2020-08-18 22:03:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:41,794 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 271 transitions. [2020-08-18 22:03:41,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-18 22:03:41,794 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 271 transitions. [2020-08-18 22:03:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-08-18 22:03:41,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:41,796 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:41,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 22:03:41,797 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash 191997085, now seen corresponding path program 43 times [2020-08-18 22:03:41,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:41,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857602811] [2020-08-18 22:03:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat