/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:04:50,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:04:50,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:04:50,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:04:50,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:04:50,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:04:50,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:04:50,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:04:50,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:04:50,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:04:50,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:04:50,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:04:50,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:04:50,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:04:50,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:04:50,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:04:50,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:04:50,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:04:50,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:04:50,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:04:50,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:04:50,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:04:50,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:04:50,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:04:50,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:04:50,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:04:50,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:04:50,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:04:50,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:04:50,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 14:04:50,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 14:04:50,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 14:04:50,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 14:04:50,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 14:04:50,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 14:04:50,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 14:04:50,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 14:04:50,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 14:04:50,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:04:50,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:04:50,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:04:50,253 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 [2020-08-21 14:04:50,275 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:04:50,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:04:50,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:04:50,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:04:50,277 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:04:50,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:04:50,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:04:50,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:04:50,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:04:50,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:04:50,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:04:50,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:04:50,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:04:50,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:04:50,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:04:50,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:04:50,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:04:50,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:04:50,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:04:50,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:04:50,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:04:50,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:04:50,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:04:50,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:04:50,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:04:50,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:04:50,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:04:50,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:04:50,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:04:50,282 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 -> log-additional-information=true; [2020-08-21 14:04:50,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:04:50,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:04:50,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:04:50,631 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:04:50,632 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:04:50,633 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-21 14:04:50,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbfb02fb5/114d2861746e4c698d4896c46c409d3c/FLAGfc8392a0b [2020-08-21 14:04:51,180 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:04:51,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-21 14:04:51,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbfb02fb5/114d2861746e4c698d4896c46c409d3c/FLAGfc8392a0b [2020-08-21 14:04:51,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbfb02fb5/114d2861746e4c698d4896c46c409d3c [2020-08-21 14:04:51,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:04:51,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:04:51,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:04:51,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:04:51,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:04:51,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:04:51" (1/1) ... [2020-08-21 14:04:51,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535e39d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:51, skipping insertion in model container [2020-08-21 14:04:51,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:04:51" (1/1) ... [2020-08-21 14:04:51,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:04:51,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:04:51,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:04:51,899 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:04:51,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:04:52,034 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:04:52,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52 WrapperNode [2020-08-21 14:04:52,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:04:52,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:04:52,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:04:52,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:04:52,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (1/1) ... [2020-08-21 14:04:52,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (1/1) ... [2020-08-21 14:04:52,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (1/1) ... [2020-08-21 14:04:52,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (1/1) ... [2020-08-21 14:04:52,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (1/1) ... [2020-08-21 14:04:52,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (1/1) ... [2020-08-21 14:04:52,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (1/1) ... [2020-08-21 14:04:52,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:04:52,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:04:52,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:04:52,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:04:52,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (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 [2020-08-21 14:04:52,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:04:52,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:04:52,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 14:04:52,155 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-21 14:04:52,155 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-21 14:04:52,155 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-21 14:04:52,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:04:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:04:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 14:04:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 14:04:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 14:04:52,156 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-21 14:04:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-21 14:04:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-21 14:04:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:04:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:04:52,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:04:52,581 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:04:52,581 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 14:04:52,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:04:52 BoogieIcfgContainer [2020-08-21 14:04:52,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:04:52,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:04:52,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:04:52,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:04:52,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:04:51" (1/3) ... [2020-08-21 14:04:52,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b151c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:04:52, skipping insertion in model container [2020-08-21 14:04:52,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:04:52" (2/3) ... [2020-08-21 14:04:52,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b151c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:04:52, skipping insertion in model container [2020-08-21 14:04:52,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:04:52" (3/3) ... [2020-08-21 14:04:52,595 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-21 14:04:52,605 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:04:52,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:04:52,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:04:52,650 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:04:52,650 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:04:52,650 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:04:52,650 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:04:52,651 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:04:52,651 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:04:52,651 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:04:52,651 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:04:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-21 14:04:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 14:04:52,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:52,680 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:52,681 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-21 14:04:52,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:52,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019943773] [2020-08-21 14:04:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:52,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:52,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:52,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:52,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 14:04:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:52,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 14:04:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:52,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:04:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:53,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019943773] [2020-08-21 14:04:53,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:53,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 14:04:53,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730844729] [2020-08-21 14:04:53,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:04:53,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:04:53,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:04:53,053 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-21 14:04:53,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:53,239 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-21 14:04:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:04:53,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-21 14:04:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:53,255 INFO L225 Difference]: With dead ends: 136 [2020-08-21 14:04:53,255 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 14:04:53,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:04:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 14:04:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-21 14:04:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 14:04:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-21 14:04:53,311 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-21 14:04:53,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:53,312 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-21 14:04:53,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:04:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-21 14:04:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 14:04:53,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:53,316 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:53,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:04:53,316 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:53,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-21 14:04:53,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:53,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947030407] [2020-08-21 14:04:53,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 14:04:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 14:04:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:04:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:53,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947030407] [2020-08-21 14:04:53,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:53,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 14:04:53,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738076980] [2020-08-21 14:04:53,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:04:53,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:53,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:04:53,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:04:53,453 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-21 14:04:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:53,544 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-21 14:04:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:04:53,545 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 14:04:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:53,548 INFO L225 Difference]: With dead ends: 129 [2020-08-21 14:04:53,548 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 14:04:53,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:04:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 14:04:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-21 14:04:53,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 14:04:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-21 14:04:53,570 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-21 14:04:53,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:53,571 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-21 14:04:53,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:04:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-21 14:04:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 14:04:53,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:53,574 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:53,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:04:53,575 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-21 14:04:53,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:53,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885573077] [2020-08-21 14:04:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 14:04:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 14:04:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:04:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:53,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885573077] [2020-08-21 14:04:53,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:53,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 14:04:53,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792863931] [2020-08-21 14:04:53,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:04:53,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:53,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:04:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:04:53,774 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-21 14:04:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:53,896 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-21 14:04:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:04:53,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-21 14:04:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:53,900 INFO L225 Difference]: With dead ends: 145 [2020-08-21 14:04:53,900 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 14:04:53,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:04:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 14:04:53,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-21 14:04:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 14:04:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-21 14:04:53,916 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-21 14:04:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:53,917 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-21 14:04:53,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:04:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-21 14:04:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 14:04:53,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:53,920 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:53,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:04:53,921 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-21 14:04:53,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:53,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222692927] [2020-08-21 14:04:53,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:53,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 14:04:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 14:04:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:04:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:54,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222692927] [2020-08-21 14:04:54,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:54,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 14:04:54,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106222461] [2020-08-21 14:04:54,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:04:54,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:04:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:04:54,030 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-21 14:04:54,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:54,105 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-21 14:04:54,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:04:54,106 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-21 14:04:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:54,108 INFO L225 Difference]: With dead ends: 156 [2020-08-21 14:04:54,108 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 14:04:54,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:04:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 14:04:54,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-21 14:04:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 14:04:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-21 14:04:54,124 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-21 14:04:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:54,124 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-21 14:04:54,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:04:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-21 14:04:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 14:04:54,127 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:54,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:54,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:04:54,128 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:54,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-21 14:04:54,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:54,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066451032] [2020-08-21 14:04:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 14:04:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:04:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 14:04:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:54,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066451032] [2020-08-21 14:04:54,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:54,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 14:04:54,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929502739] [2020-08-21 14:04:54,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:04:54,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:54,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:04:54,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:04:54,333 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-21 14:04:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:54,446 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-21 14:04:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:04:54,446 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-21 14:04:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:54,448 INFO L225 Difference]: With dead ends: 166 [2020-08-21 14:04:54,449 INFO L226 Difference]: Without dead ends: 106 [2020-08-21 14:04:54,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:04:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-21 14:04:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-21 14:04:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 14:04:54,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-21 14:04:54,464 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-21 14:04:54,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:54,464 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-21 14:04:54,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:04:54,465 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-21 14:04:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 14:04:54,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:54,467 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:54,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:04:54,468 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-21 14:04:54,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:54,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99918250] [2020-08-21 14:04:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 14:04:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 14:04:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:04:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:54,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99918250] [2020-08-21 14:04:54,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:54,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 14:04:54,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289500455] [2020-08-21 14:04:54,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:04:54,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:54,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:04:54,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:04:54,625 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-21 14:04:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:54,730 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-21 14:04:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 14:04:54,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-21 14:04:54,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:54,732 INFO L225 Difference]: With dead ends: 176 [2020-08-21 14:04:54,734 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 14:04:54,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:04:54,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 14:04:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-21 14:04:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 14:04:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-21 14:04:54,775 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-21 14:04:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:54,776 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-21 14:04:54,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:04:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-21 14:04:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 14:04:54,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:54,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:54,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:04:54,780 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-21 14:04:54,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:54,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819300471] [2020-08-21 14:04:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 14:04:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:04:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 14:04:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:54,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819300471] [2020-08-21 14:04:54,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:54,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:04:54,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049162483] [2020-08-21 14:04:54,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:04:54,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:04:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:04:54,990 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-21 14:04:55,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:55,117 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-21 14:04:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:04:55,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-21 14:04:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:55,120 INFO L225 Difference]: With dead ends: 178 [2020-08-21 14:04:55,121 INFO L226 Difference]: Without dead ends: 115 [2020-08-21 14:04:55,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:04:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-21 14:04:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-21 14:04:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 14:04:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-21 14:04:55,152 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-21 14:04:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:55,153 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-21 14:04:55,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:04:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-21 14:04:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 14:04:55,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:55,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:55,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:04:55,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-21 14:04:55,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:55,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778594652] [2020-08-21 14:04:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 14:04:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 14:04:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 14:04:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:55,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778594652] [2020-08-21 14:04:55,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:55,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 14:04:55,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483794852] [2020-08-21 14:04:55,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 14:04:55,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:55,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 14:04:55,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-21 14:04:55,316 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-21 14:04:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:55,411 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-21 14:04:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:04:55,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-21 14:04:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:55,415 INFO L225 Difference]: With dead ends: 193 [2020-08-21 14:04:55,415 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 14:04:55,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:04:55,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 14:04:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-21 14:04:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 14:04:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-21 14:04:55,431 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-21 14:04:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:55,432 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-21 14:04:55,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 14:04:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-21 14:04:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 14:04:55,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:55,434 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:55,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:04:55,434 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:55,434 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-21 14:04:55,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:55,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974047022] [2020-08-21 14:04:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 14:04:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:04:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 14:04:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:55,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974047022] [2020-08-21 14:04:55,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:55,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:04:55,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516042865] [2020-08-21 14:04:55,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:04:55,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:04:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:04:55,618 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-21 14:04:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:55,794 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-21 14:04:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:04:55,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-21 14:04:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:55,798 INFO L225 Difference]: With dead ends: 190 [2020-08-21 14:04:55,798 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 14:04:55,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:04:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 14:04:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-21 14:04:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 14:04:55,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-21 14:04:55,825 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-21 14:04:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:55,826 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-21 14:04:55,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:04:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-21 14:04:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 14:04:55,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:55,827 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:55,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 14:04:55,828 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:55,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-21 14:04:55,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:55,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787380684] [2020-08-21 14:04:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 14:04:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 14:04:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:04:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:55,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787380684] [2020-08-21 14:04:55,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:55,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 14:04:55,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917700276] [2020-08-21 14:04:55,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:04:55,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:55,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:04:55,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:04:55,976 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-21 14:04:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:56,069 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-21 14:04:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:04:56,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-21 14:04:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:56,071 INFO L225 Difference]: With dead ends: 210 [2020-08-21 14:04:56,071 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 14:04:56,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:04:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 14:04:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-21 14:04:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 14:04:56,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-21 14:04:56,082 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-21 14:04:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:56,082 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-21 14:04:56,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:04:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-21 14:04:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 14:04:56,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:56,084 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:56,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 14:04:56,084 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-21 14:04:56,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:56,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483366653] [2020-08-21 14:04:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 14:04:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:04:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 14:04:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:56,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483366653] [2020-08-21 14:04:56,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:56,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:04:56,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85056934] [2020-08-21 14:04:56,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:04:56,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:04:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:04:56,233 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-21 14:04:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:56,380 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-21 14:04:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:04:56,382 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-21 14:04:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:56,384 INFO L225 Difference]: With dead ends: 202 [2020-08-21 14:04:56,384 INFO L226 Difference]: Without dead ends: 133 [2020-08-21 14:04:56,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:04:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-21 14:04:56,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-21 14:04:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-21 14:04:56,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-21 14:04:56,394 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-21 14:04:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:56,395 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-21 14:04:56,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:04:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-21 14:04:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 14:04:56,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:56,397 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:56,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 14:04:56,397 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:56,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-21 14:04:56,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:56,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33402221] [2020-08-21 14:04:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 14:04:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 14:04:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 14:04:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:56,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33402221] [2020-08-21 14:04:56,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:56,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:04:56,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541833549] [2020-08-21 14:04:56,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:04:56,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:04:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:04:56,519 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-21 14:04:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:56,647 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-21 14:04:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:04:56,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 14:04:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:56,650 INFO L225 Difference]: With dead ends: 227 [2020-08-21 14:04:56,650 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 14:04:56,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:04:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 14:04:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-21 14:04:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 14:04:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-21 14:04:56,662 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-21 14:04:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:56,662 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-21 14:04:56,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:04:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-21 14:04:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 14:04:56,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:56,664 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:56,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 14:04:56,664 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:56,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-21 14:04:56,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:56,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817526513] [2020-08-21 14:04:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 14:04:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 14:04:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 14:04:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:56,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817526513] [2020-08-21 14:04:56,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:56,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:04:56,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20555107] [2020-08-21 14:04:56,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:04:56,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:04:56,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:04:56,843 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-21 14:04:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:57,057 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-21 14:04:57,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:04:57,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-21 14:04:57,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:57,060 INFO L225 Difference]: With dead ends: 214 [2020-08-21 14:04:57,060 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 14:04:57,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:04:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 14:04:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-21 14:04:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 14:04:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-21 14:04:57,074 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-21 14:04:57,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:57,076 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-21 14:04:57,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:04:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-21 14:04:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 14:04:57,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:57,077 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:57,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 14:04:57,077 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-21 14:04:57,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:57,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548226762] [2020-08-21 14:04:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 14:04:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 14:04:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 14:04:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:57,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548226762] [2020-08-21 14:04:57,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:57,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:04:57,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944154862] [2020-08-21 14:04:57,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:04:57,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:04:57,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:04:57,236 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-21 14:04:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:57,359 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-21 14:04:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:04:57,359 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-21 14:04:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:57,361 INFO L225 Difference]: With dead ends: 244 [2020-08-21 14:04:57,361 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 14:04:57,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:04:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 14:04:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-21 14:04:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 14:04:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-21 14:04:57,374 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-21 14:04:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:57,375 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-21 14:04:57,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:04:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-21 14:04:57,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 14:04:57,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:57,376 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:57,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 14:04:57,377 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-21 14:04:57,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:57,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911746226] [2020-08-21 14:04:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 14:04:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:04:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 14:04:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:57,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911746226] [2020-08-21 14:04:57,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:57,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:04:57,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190579579] [2020-08-21 14:04:57,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:04:57,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:57,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:04:57,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:04:57,619 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-21 14:04:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:57,859 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-21 14:04:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:04:57,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-21 14:04:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:57,861 INFO L225 Difference]: With dead ends: 226 [2020-08-21 14:04:57,862 INFO L226 Difference]: Without dead ends: 151 [2020-08-21 14:04:57,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:04:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-21 14:04:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-21 14:04:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 14:04:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-21 14:04:57,873 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-21 14:04:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:57,874 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-21 14:04:57,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:04:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-21 14:04:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 14:04:57,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:57,875 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:57,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 14:04:57,875 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-21 14:04:57,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:57,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847642097] [2020-08-21 14:04:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:57,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 14:04:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 14:04:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 14:04:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:58,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847642097] [2020-08-21 14:04:58,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:58,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:04:58,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115703491] [2020-08-21 14:04:58,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:04:58,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:58,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:04:58,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:04:58,052 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-21 14:04:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:58,195 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-21 14:04:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 14:04:58,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-21 14:04:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:58,197 INFO L225 Difference]: With dead ends: 261 [2020-08-21 14:04:58,197 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 14:04:58,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:04:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 14:04:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-21 14:04:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-21 14:04:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-21 14:04:58,210 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-21 14:04:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:58,210 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-21 14:04:58,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:04:58,210 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-21 14:04:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 14:04:58,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:58,211 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:58,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 14:04:58,212 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-21 14:04:58,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:58,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539784768] [2020-08-21 14:04:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 14:04:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 14:04:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 14:04:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:58,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539784768] [2020-08-21 14:04:58,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:58,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:04:58,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918825847] [2020-08-21 14:04:58,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:04:58,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:04:58,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:04:58,488 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-21 14:04:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:58,737 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-21 14:04:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:04:58,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-21 14:04:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:58,739 INFO L225 Difference]: With dead ends: 238 [2020-08-21 14:04:58,739 INFO L226 Difference]: Without dead ends: 160 [2020-08-21 14:04:58,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:04:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-21 14:04:58,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-21 14:04:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 14:04:58,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-21 14:04:58,762 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-21 14:04:58,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:58,762 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-21 14:04:58,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:04:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-21 14:04:58,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 14:04:58,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:58,764 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:58,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 14:04:58,764 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:58,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-21 14:04:58,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:58,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164724204] [2020-08-21 14:04:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 14:04:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 14:04:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:04:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:58,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164724204] [2020-08-21 14:04:58,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:58,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:04:58,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325216001] [2020-08-21 14:04:58,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:04:58,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:58,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:04:58,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:04:58,944 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-21 14:04:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:59,144 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-21 14:04:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:04:59,145 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-21 14:04:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:59,148 INFO L225 Difference]: With dead ends: 278 [2020-08-21 14:04:59,148 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 14:04:59,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:04:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 14:04:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-21 14:04:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 14:04:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-21 14:04:59,167 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-21 14:04:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:59,167 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-21 14:04:59,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:04:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-21 14:04:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 14:04:59,173 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:59,173 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:59,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 14:04:59,174 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:59,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-21 14:04:59,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:59,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932817037] [2020-08-21 14:04:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 14:04:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 14:04:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 14:04:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:59,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932817037] [2020-08-21 14:04:59,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:59,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:04:59,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445480980] [2020-08-21 14:04:59,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:04:59,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:59,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:04:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:04:59,453 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-21 14:04:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:04:59,716 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-21 14:04:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:04:59,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-21 14:04:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:04:59,719 INFO L225 Difference]: With dead ends: 250 [2020-08-21 14:04:59,719 INFO L226 Difference]: Without dead ends: 169 [2020-08-21 14:04:59,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:04:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-21 14:04:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-21 14:04:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-21 14:04:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-21 14:04:59,731 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-21 14:04:59,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:04:59,731 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-21 14:04:59,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:04:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-21 14:04:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 14:04:59,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:04:59,733 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:04:59,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 14:04:59,733 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:04:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:04:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-21 14:04:59,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:04:59,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59210628] [2020-08-21 14:04:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:04:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:04:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:04:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:04:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 14:04:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 14:04:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:04:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:04:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:04:59,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59210628] [2020-08-21 14:04:59,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:04:59,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:04:59,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350865007] [2020-08-21 14:04:59,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:04:59,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:04:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:04:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:04:59,975 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-21 14:05:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:00,150 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-21 14:05:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 14:05:00,153 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-21 14:05:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:00,155 INFO L225 Difference]: With dead ends: 295 [2020-08-21 14:05:00,156 INFO L226 Difference]: Without dead ends: 208 [2020-08-21 14:05:00,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:05:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-21 14:05:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-21 14:05:00,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 14:05:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-21 14:05:00,171 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-21 14:05:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:00,171 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-21 14:05:00,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:05:00,171 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-21 14:05:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-21 14:05:00,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:00,173 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:00,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 14:05:00,173 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-21 14:05:00,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:00,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386544872] [2020-08-21 14:05:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 14:05:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 14:05:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 14:05:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:00,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386544872] [2020-08-21 14:05:00,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:00,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:05:00,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446589410] [2020-08-21 14:05:00,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:05:00,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:00,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:05:00,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:05:00,460 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-21 14:05:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:00,791 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-21 14:05:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:05:00,792 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-21 14:05:00,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:00,793 INFO L225 Difference]: With dead ends: 262 [2020-08-21 14:05:00,794 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 14:05:00,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:05:00,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 14:05:00,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-21 14:05:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 14:05:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-21 14:05:00,807 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-21 14:05:00,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:00,807 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-21 14:05:00,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:05:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-21 14:05:00,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 14:05:00,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:00,808 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:00,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 14:05:00,810 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:00,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:00,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-21 14:05:00,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:00,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667839283] [2020-08-21 14:05:00,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 14:05:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 14:05:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:00,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 14:05:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:01,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667839283] [2020-08-21 14:05:01,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:01,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:05:01,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658847465] [2020-08-21 14:05:01,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:05:01,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:01,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:05:01,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:05:01,016 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-21 14:05:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:01,219 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-21 14:05:01,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:05:01,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-21 14:05:01,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:01,228 INFO L225 Difference]: With dead ends: 312 [2020-08-21 14:05:01,228 INFO L226 Difference]: Without dead ends: 222 [2020-08-21 14:05:01,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:05:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-21 14:05:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-21 14:05:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 14:05:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-21 14:05:01,249 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-21 14:05:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:01,249 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-21 14:05:01,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:05:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-21 14:05:01,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 14:05:01,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:01,253 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:01,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 14:05:01,253 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-21 14:05:01,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:01,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278127963] [2020-08-21 14:05:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 14:05:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:05:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 14:05:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:01,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278127963] [2020-08-21 14:05:01,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:01,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 14:05:01,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245600246] [2020-08-21 14:05:01,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:05:01,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:01,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:05:01,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:05:01,617 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-21 14:05:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:02,014 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-21 14:05:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:05:02,015 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-21 14:05:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:02,017 INFO L225 Difference]: With dead ends: 274 [2020-08-21 14:05:02,017 INFO L226 Difference]: Without dead ends: 187 [2020-08-21 14:05:02,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:05:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-21 14:05:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-21 14:05:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 14:05:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-21 14:05:02,030 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-21 14:05:02,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:02,030 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-21 14:05:02,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:05:02,031 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-21 14:05:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 14:05:02,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:02,032 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:02,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 14:05:02,032 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:02,033 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-21 14:05:02,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:02,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29965448] [2020-08-21 14:05:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:02,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 14:05:02,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 14:05:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:05:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:02,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29965448] [2020-08-21 14:05:02,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:02,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 14:05:02,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235188233] [2020-08-21 14:05:02,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 14:05:02,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 14:05:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:05:02,262 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-21 14:05:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:02,446 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-21 14:05:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 14:05:02,447 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-21 14:05:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:02,449 INFO L225 Difference]: With dead ends: 329 [2020-08-21 14:05:02,449 INFO L226 Difference]: Without dead ends: 236 [2020-08-21 14:05:02,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:05:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-21 14:05:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-21 14:05:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-21 14:05:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-21 14:05:02,470 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-21 14:05:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:02,471 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-21 14:05:02,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 14:05:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-21 14:05:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 14:05:02,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:02,483 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:02,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 14:05:02,486 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:02,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:02,487 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-21 14:05:02,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:02,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212890100] [2020-08-21 14:05:02,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 14:05:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:05:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 14:05:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:02,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212890100] [2020-08-21 14:05:02,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:02,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:05:02,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110902212] [2020-08-21 14:05:02,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:05:02,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:02,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:05:02,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:05:02,819 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-21 14:05:03,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:03,268 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-21 14:05:03,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 14:05:03,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-21 14:05:03,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:03,270 INFO L225 Difference]: With dead ends: 286 [2020-08-21 14:05:03,271 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 14:05:03,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:05:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 14:05:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-21 14:05:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-21 14:05:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-21 14:05:03,287 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-21 14:05:03,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:03,288 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-21 14:05:03,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:05:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-21 14:05:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 14:05:03,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:03,289 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:03,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 14:05:03,290 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-21 14:05:03,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:03,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986497960] [2020-08-21 14:05:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 14:05:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 14:05:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 14:05:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:03,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986497960] [2020-08-21 14:05:03,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:03,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 14:05:03,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648300168] [2020-08-21 14:05:03,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 14:05:03,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 14:05:03,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:05:03,575 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-21 14:05:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:03,775 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-21 14:05:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 14:05:03,776 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-21 14:05:03,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:03,778 INFO L225 Difference]: With dead ends: 346 [2020-08-21 14:05:03,778 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 14:05:03,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:05:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 14:05:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-21 14:05:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 14:05:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-21 14:05:03,807 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-21 14:05:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:03,808 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-21 14:05:03,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 14:05:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-21 14:05:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 14:05:03,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:03,809 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:03,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 14:05:03,809 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-21 14:05:03,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:03,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721188473] [2020-08-21 14:05:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 14:05:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 14:05:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 14:05:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-21 14:05:03,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721188473] [2020-08-21 14:05:03,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:05:03,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 14:05:03,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223504814] [2020-08-21 14:05:03,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 14:05:03,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:03,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 14:05:03,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:05:03,869 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-21 14:05:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:03,879 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-21 14:05:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 14:05:03,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-21 14:05:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:03,881 INFO L225 Difference]: With dead ends: 160 [2020-08-21 14:05:03,881 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 14:05:03,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 14:05:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 14:05:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-21 14:05:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 14:05:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-21 14:05:03,896 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-21 14:05:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:03,896 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-21 14:05:03,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 14:05:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-21 14:05:03,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 14:05:03,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:03,897 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:03,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 14:05:03,898 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-21 14:05:03,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:03,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050608326] [2020-08-21 14:05:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 14:05:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 14:05:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 14:05:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-21 14:05:03,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050608326] [2020-08-21 14:05:03,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:05:03,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:05:03,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469570673] [2020-08-21 14:05:03,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:05:03,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:03,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:05:03,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:05:03,968 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-21 14:05:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:03,997 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-21 14:05:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:05:03,997 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-21 14:05:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:03,999 INFO L225 Difference]: With dead ends: 161 [2020-08-21 14:05:03,999 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 14:05:03,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:05:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 14:05:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-21 14:05:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 14:05:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-21 14:05:04,016 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-21 14:05:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:04,016 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-21 14:05:04,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:05:04,017 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-21 14:05:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 14:05:04,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:04,018 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:04,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 14:05:04,018 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:04,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:04,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-21 14:05:04,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:04,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731417979] [2020-08-21 14:05:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:04,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:04,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:04,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:04,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 14:05:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:04,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 14:05:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:04,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 14:05:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:04,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731417979] [2020-08-21 14:05:04,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:04,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 14:05:04,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252572342] [2020-08-21 14:05:04,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 14:05:04,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:04,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 14:05:04,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:05:04,384 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-21 14:05:04,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:04,941 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-21 14:05:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:05:04,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-21 14:05:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:04,948 INFO L225 Difference]: With dead ends: 298 [2020-08-21 14:05:04,948 INFO L226 Difference]: Without dead ends: 205 [2020-08-21 14:05:04,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:05:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-21 14:05:04,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-21 14:05:04,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-21 14:05:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-21 14:05:04,965 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-21 14:05:04,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:04,965 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-21 14:05:04,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 14:05:04,965 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-21 14:05:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 14:05:04,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:04,967 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:04,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 14:05:04,967 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:04,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:04,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-21 14:05:04,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:04,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156721621] [2020-08-21 14:05:04,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 14:05:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 14:05:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 14:05:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:05,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156721621] [2020-08-21 14:05:05,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:05,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 14:05:05,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901902591] [2020-08-21 14:05:05,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 14:05:05,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:05,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 14:05:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:05:05,309 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-21 14:05:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:05,560 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-21 14:05:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 14:05:05,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-21 14:05:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:05,563 INFO L225 Difference]: With dead ends: 363 [2020-08-21 14:05:05,563 INFO L226 Difference]: Without dead ends: 264 [2020-08-21 14:05:05,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:05:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-21 14:05:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-21 14:05:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 14:05:05,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-21 14:05:05,583 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-21 14:05:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:05,583 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-21 14:05:05,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 14:05:05,583 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-21 14:05:05,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 14:05:05,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:05,585 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:05,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 14:05:05,585 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:05,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:05,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-21 14:05:05,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:05,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142713473] [2020-08-21 14:05:05,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 14:05:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:05:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 14:05:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:06,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142713473] [2020-08-21 14:05:06,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:06,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 14:05:06,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173193773] [2020-08-21 14:05:06,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 14:05:06,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:06,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 14:05:06,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:05:06,001 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-21 14:05:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:06,662 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-21 14:05:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 14:05:06,663 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-21 14:05:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:06,664 INFO L225 Difference]: With dead ends: 310 [2020-08-21 14:05:06,665 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 14:05:06,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:05:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 14:05:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-21 14:05:06,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-21 14:05:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-21 14:05:06,682 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-21 14:05:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:06,682 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-21 14:05:06,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 14:05:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-21 14:05:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-21 14:05:06,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:06,684 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:06,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 14:05:06,685 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-21 14:05:06,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:06,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587229237] [2020-08-21 14:05:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:06,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:06,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:06,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:06,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 14:05:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:06,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 14:05:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:06,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 14:05:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:07,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587229237] [2020-08-21 14:05:07,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:07,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 14:05:07,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982364960] [2020-08-21 14:05:07,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 14:05:07,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:07,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 14:05:07,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:05:07,014 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-21 14:05:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:07,223 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-21 14:05:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 14:05:07,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-21 14:05:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:07,226 INFO L225 Difference]: With dead ends: 380 [2020-08-21 14:05:07,227 INFO L226 Difference]: Without dead ends: 278 [2020-08-21 14:05:07,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:05:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-21 14:05:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-21 14:05:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-21 14:05:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-21 14:05:07,241 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-21 14:05:07,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:07,242 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-21 14:05:07,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 14:05:07,242 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-21 14:05:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 14:05:07,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:07,243 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:07,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 14:05:07,243 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-21 14:05:07,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:07,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214717963] [2020-08-21 14:05:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 14:05:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 14:05:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 14:05:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:07,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214717963] [2020-08-21 14:05:07,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:07,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 14:05:07,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885149030] [2020-08-21 14:05:07,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 14:05:07,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 14:05:07,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:05:07,686 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-21 14:05:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:08,417 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-21 14:05:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:05:08,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 14:05:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:08,419 INFO L225 Difference]: With dead ends: 322 [2020-08-21 14:05:08,419 INFO L226 Difference]: Without dead ends: 223 [2020-08-21 14:05:08,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:05:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-21 14:05:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-21 14:05:08,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 14:05:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-21 14:05:08,432 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-21 14:05:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:08,432 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-21 14:05:08,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 14:05:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-21 14:05:08,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 14:05:08,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:08,433 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:08,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 14:05:08,434 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:08,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:08,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-21 14:05:08,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:08,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88468435] [2020-08-21 14:05:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:08,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:08,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:08,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 14:05:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:08,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 14:05:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:08,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 14:05:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:08,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88468435] [2020-08-21 14:05:08,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:08,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 14:05:08,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205613351] [2020-08-21 14:05:08,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 14:05:08,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 14:05:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-21 14:05:08,762 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-21 14:05:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:09,021 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-21 14:05:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 14:05:09,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-21 14:05:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:09,028 INFO L225 Difference]: With dead ends: 397 [2020-08-21 14:05:09,028 INFO L226 Difference]: Without dead ends: 292 [2020-08-21 14:05:09,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:05:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-21 14:05:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-21 14:05:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-21 14:05:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-21 14:05:09,044 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-21 14:05:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:09,044 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-21 14:05:09,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 14:05:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-21 14:05:09,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 14:05:09,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:09,046 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:09,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 14:05:09,046 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:09,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:09,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-21 14:05:09,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:09,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687166594] [2020-08-21 14:05:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:09,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:09,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:09,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:09,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 14:05:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:05:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:09,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 14:05:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:09,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687166594] [2020-08-21 14:05:09,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:09,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 14:05:09,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428858929] [2020-08-21 14:05:09,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 14:05:09,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 14:05:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:05:09,513 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-21 14:05:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:10,282 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-21 14:05:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 14:05:10,283 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-21 14:05:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:10,284 INFO L225 Difference]: With dead ends: 334 [2020-08-21 14:05:10,284 INFO L226 Difference]: Without dead ends: 232 [2020-08-21 14:05:10,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-21 14:05:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-21 14:05:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-21 14:05:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 14:05:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-21 14:05:10,307 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-21 14:05:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:10,308 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-21 14:05:10,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 14:05:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-21 14:05:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-21 14:05:10,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:10,310 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:10,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 14:05:10,310 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-21 14:05:10,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:10,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217981403] [2020-08-21 14:05:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 14:05:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 14:05:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 14:05:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:10,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217981403] [2020-08-21 14:05:10,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:10,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 14:05:10,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433090951] [2020-08-21 14:05:10,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 14:05:10,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:10,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 14:05:10,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-21 14:05:10,653 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-21 14:05:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:10,932 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-21 14:05:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 14:05:10,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-21 14:05:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:10,938 INFO L225 Difference]: With dead ends: 414 [2020-08-21 14:05:10,939 INFO L226 Difference]: Without dead ends: 306 [2020-08-21 14:05:10,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-21 14:05:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-21 14:05:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-21 14:05:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-21 14:05:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-21 14:05:10,958 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-21 14:05:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:10,958 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-21 14:05:10,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 14:05:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-21 14:05:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 14:05:10,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:10,962 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:10,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-21 14:05:10,962 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:10,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:10,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-21 14:05:10,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:10,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327312685] [2020-08-21 14:05:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:10,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:10,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 14:05:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 14:05:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 14:05:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:11,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327312685] [2020-08-21 14:05:11,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:11,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 14:05:11,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283639863] [2020-08-21 14:05:11,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 14:05:11,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:11,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 14:05:11,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-21 14:05:11,483 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-21 14:05:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:12,312 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-21 14:05:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:05:12,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-21 14:05:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:12,320 INFO L225 Difference]: With dead ends: 346 [2020-08-21 14:05:12,320 INFO L226 Difference]: Without dead ends: 241 [2020-08-21 14:05:12,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:05:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-21 14:05:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-21 14:05:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-21 14:05:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-21 14:05:12,336 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-21 14:05:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:12,336 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-21 14:05:12,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 14:05:12,337 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-21 14:05:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 14:05:12,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:12,338 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:12,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-21 14:05:12,338 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:12,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-21 14:05:12,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:12,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326089469] [2020-08-21 14:05:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 14:05:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 14:05:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 14:05:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:12,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326089469] [2020-08-21 14:05:12,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:12,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 14:05:12,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215264787] [2020-08-21 14:05:12,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 14:05:12,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 14:05:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-21 14:05:12,711 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-21 14:05:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:13,004 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-21 14:05:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 14:05:13,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-21 14:05:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:13,007 INFO L225 Difference]: With dead ends: 431 [2020-08-21 14:05:13,008 INFO L226 Difference]: Without dead ends: 320 [2020-08-21 14:05:13,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:05:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-21 14:05:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-21 14:05:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-21 14:05:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-21 14:05:13,025 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-21 14:05:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:13,026 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-21 14:05:13,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 14:05:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-21 14:05:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-21 14:05:13,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:13,027 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:13,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-21 14:05:13,027 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:13,028 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-21 14:05:13,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:13,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788527667] [2020-08-21 14:05:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 14:05:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 14:05:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 14:05:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:13,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788527667] [2020-08-21 14:05:13,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:13,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 14:05:13,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124428088] [2020-08-21 14:05:13,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 14:05:13,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:13,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 14:05:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:05:13,594 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-21 14:05:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:14,404 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-21 14:05:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 14:05:14,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-21 14:05:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:14,407 INFO L225 Difference]: With dead ends: 358 [2020-08-21 14:05:14,407 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 14:05:14,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:05:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 14:05:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-21 14:05:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-21 14:05:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-21 14:05:14,423 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-21 14:05:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:14,424 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-21 14:05:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 14:05:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-21 14:05:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-21 14:05:14,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:14,425 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:14,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-21 14:05:14,426 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-21 14:05:14,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:14,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932774650] [2020-08-21 14:05:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 14:05:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 14:05:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:14,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932774650] [2020-08-21 14:05:14,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:14,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 14:05:14,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340259144] [2020-08-21 14:05:14,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 14:05:14,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:14,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 14:05:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-21 14:05:14,833 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-21 14:05:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:15,126 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-21 14:05:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 14:05:15,129 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-21 14:05:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:15,132 INFO L225 Difference]: With dead ends: 448 [2020-08-21 14:05:15,132 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 14:05:15,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:05:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 14:05:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-21 14:05:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 14:05:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-21 14:05:15,175 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-21 14:05:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:15,175 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-21 14:05:15,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 14:05:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-21 14:05:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 14:05:15,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:15,176 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:15,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-21 14:05:15,177 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:15,177 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-21 14:05:15,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:15,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300719641] [2020-08-21 14:05:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 14:05:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 14:05:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 14:05:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:15,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300719641] [2020-08-21 14:05:15,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:15,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 14:05:15,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708415742] [2020-08-21 14:05:15,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 14:05:15,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 14:05:15,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:05:15,727 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-21 14:05:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:16,696 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-21 14:05:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:05:16,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-21 14:05:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:16,702 INFO L225 Difference]: With dead ends: 370 [2020-08-21 14:05:16,702 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 14:05:16,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:05:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 14:05:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-21 14:05:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 14:05:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-21 14:05:16,733 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-21 14:05:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:16,733 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-21 14:05:16,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 14:05:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-21 14:05:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 14:05:16,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:16,736 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:16,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-21 14:05:16,736 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-21 14:05:16,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:16,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928124528] [2020-08-21 14:05:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:16,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 14:05:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 14:05:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 14:05:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:17,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928124528] [2020-08-21 14:05:17,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:17,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 14:05:17,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46811411] [2020-08-21 14:05:17,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 14:05:17,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:17,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 14:05:17,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-21 14:05:17,325 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-21 14:05:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:17,695 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-21 14:05:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 14:05:17,702 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-21 14:05:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:17,705 INFO L225 Difference]: With dead ends: 465 [2020-08-21 14:05:17,705 INFO L226 Difference]: Without dead ends: 348 [2020-08-21 14:05:17,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:05:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-21 14:05:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-21 14:05:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-21 14:05:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-21 14:05:17,727 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-21 14:05:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:17,727 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-21 14:05:17,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 14:05:17,728 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-21 14:05:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-21 14:05:17,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:17,729 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:17,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-21 14:05:17,730 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-21 14:05:17,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:17,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708372302] [2020-08-21 14:05:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:17,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 14:05:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 14:05:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 14:05:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:18,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708372302] [2020-08-21 14:05:18,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:18,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 14:05:18,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093015496] [2020-08-21 14:05:18,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 14:05:18,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:18,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 14:05:18,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:05:18,392 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-21 14:05:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:19,539 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-21 14:05:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 14:05:19,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-21 14:05:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:19,541 INFO L225 Difference]: With dead ends: 382 [2020-08-21 14:05:19,541 INFO L226 Difference]: Without dead ends: 268 [2020-08-21 14:05:19,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:05:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-21 14:05:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-21 14:05:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-21 14:05:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-21 14:05:19,559 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-21 14:05:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:19,559 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-21 14:05:19,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 14:05:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-21 14:05:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-21 14:05:19,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:19,561 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:19,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-21 14:05:19,561 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-21 14:05:19,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:19,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258249840] [2020-08-21 14:05:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:19,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:19,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:19,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 14:05:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 14:05:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 14:05:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:20,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258249840] [2020-08-21 14:05:20,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:20,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 14:05:20,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999088046] [2020-08-21 14:05:20,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 14:05:20,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:20,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 14:05:20,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-21 14:05:20,028 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-21 14:05:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:20,394 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-21 14:05:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 14:05:20,395 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-21 14:05:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:20,397 INFO L225 Difference]: With dead ends: 482 [2020-08-21 14:05:20,397 INFO L226 Difference]: Without dead ends: 362 [2020-08-21 14:05:20,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:05:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-21 14:05:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-21 14:05:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-21 14:05:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-21 14:05:20,418 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-21 14:05:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:20,418 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-21 14:05:20,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 14:05:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-21 14:05:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 14:05:20,419 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:20,420 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:20,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-21 14:05:20,420 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:20,420 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-21 14:05:20,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:20,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964118582] [2020-08-21 14:05:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:20,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:21,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 14:05:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:21,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 14:05:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:21,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 14:05:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:21,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964118582] [2020-08-21 14:05:21,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:21,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 14:05:21,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352453654] [2020-08-21 14:05:21,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 14:05:21,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:21,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 14:05:21,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:05:21,103 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-21 14:05:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:22,330 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-21 14:05:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 14:05:22,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-21 14:05:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:22,333 INFO L225 Difference]: With dead ends: 394 [2020-08-21 14:05:22,333 INFO L226 Difference]: Without dead ends: 277 [2020-08-21 14:05:22,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:05:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-21 14:05:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-21 14:05:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-21 14:05:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-21 14:05:22,351 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-21 14:05:22,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:22,351 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-21 14:05:22,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 14:05:22,351 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-21 14:05:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-21 14:05:22,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:22,352 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:22,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-21 14:05:22,353 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:22,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-21 14:05:22,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:22,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222754542] [2020-08-21 14:05:22,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 14:05:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 14:05:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 14:05:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:22,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222754542] [2020-08-21 14:05:22,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:22,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 14:05:22,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337974215] [2020-08-21 14:05:22,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 14:05:22,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 14:05:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-21 14:05:22,869 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-21 14:05:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:23,228 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-21 14:05:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 14:05:23,228 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-21 14:05:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:23,230 INFO L225 Difference]: With dead ends: 499 [2020-08-21 14:05:23,231 INFO L226 Difference]: Without dead ends: 376 [2020-08-21 14:05:23,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:05:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-21 14:05:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-21 14:05:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-21 14:05:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-21 14:05:23,256 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-21 14:05:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:23,257 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-21 14:05:23,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 14:05:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-21 14:05:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-21 14:05:23,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:23,258 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:23,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-21 14:05:23,259 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:23,259 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-21 14:05:23,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:23,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583905719] [2020-08-21 14:05:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:23,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:23,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 14:05:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 14:05:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 14:05:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:24,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583905719] [2020-08-21 14:05:24,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:24,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 14:05:24,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134143615] [2020-08-21 14:05:24,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 14:05:24,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 14:05:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:05:24,114 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-21 14:05:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:25,415 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-21 14:05:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 14:05:25,416 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-21 14:05:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:25,418 INFO L225 Difference]: With dead ends: 406 [2020-08-21 14:05:25,418 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 14:05:25,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:05:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 14:05:25,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-21 14:05:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-21 14:05:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-21 14:05:25,438 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-21 14:05:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:25,439 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-21 14:05:25,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 14:05:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-21 14:05:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-21 14:05:25,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:25,441 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:25,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-21 14:05:25,441 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-21 14:05:25,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:25,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172592099] [2020-08-21 14:05:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 14:05:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 14:05:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:25,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 14:05:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:26,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172592099] [2020-08-21 14:05:26,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:26,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 14:05:26,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422451096] [2020-08-21 14:05:26,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 14:05:26,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 14:05:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-21 14:05:26,025 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-21 14:05:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:26,464 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-21 14:05:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 14:05:26,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-21 14:05:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:26,468 INFO L225 Difference]: With dead ends: 516 [2020-08-21 14:05:26,469 INFO L226 Difference]: Without dead ends: 390 [2020-08-21 14:05:26,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:05:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-21 14:05:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-21 14:05:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 14:05:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-21 14:05:26,511 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-21 14:05:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:26,512 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-21 14:05:26,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 14:05:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-21 14:05:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 14:05:26,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:26,515 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:26,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-21 14:05:26,516 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:26,516 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-21 14:05:26,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:26,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379202488] [2020-08-21 14:05:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:26,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 14:05:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 14:05:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 14:05:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:27,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379202488] [2020-08-21 14:05:27,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:27,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 14:05:27,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077428673] [2020-08-21 14:05:27,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 14:05:27,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 14:05:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:05:27,318 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-21 14:05:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:28,767 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-21 14:05:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 14:05:28,769 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-21 14:05:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:28,771 INFO L225 Difference]: With dead ends: 418 [2020-08-21 14:05:28,771 INFO L226 Difference]: Without dead ends: 295 [2020-08-21 14:05:28,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:05:28,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-21 14:05:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-21 14:05:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-21 14:05:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-21 14:05:28,792 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-21 14:05:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:28,792 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-21 14:05:28,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 14:05:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-21 14:05:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-21 14:05:28,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:28,794 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:28,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-21 14:05:28,794 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:28,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-21 14:05:28,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:28,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520744308] [2020-08-21 14:05:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:28,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:28,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:28,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 14:05:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 14:05:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-21 14:05:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 14:05:29,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520744308] [2020-08-21 14:05:29,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:29,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 14:05:29,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862215353] [2020-08-21 14:05:29,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 14:05:29,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 14:05:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-21 14:05:29,374 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-21 14:05:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:29,801 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-21 14:05:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 14:05:29,801 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-21 14:05:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:29,804 INFO L225 Difference]: With dead ends: 533 [2020-08-21 14:05:29,804 INFO L226 Difference]: Without dead ends: 404 [2020-08-21 14:05:29,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-21 14:05:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-21 14:05:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-21 14:05:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 14:05:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-21 14:05:29,826 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-21 14:05:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:29,826 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-21 14:05:29,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 14:05:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-21 14:05:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 14:05:29,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:29,828 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:29,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-21 14:05:29,828 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:29,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:29,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-21 14:05:29,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:29,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143734089] [2020-08-21 14:05:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 14:05:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:29,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 14:05:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-21 14:05:30,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143734089] [2020-08-21 14:05:30,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:05:30,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 14:05:30,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303594499] [2020-08-21 14:05:30,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:05:30,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:30,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:05:30,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:05:30,036 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-21 14:05:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:30,296 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-21 14:05:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:30,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-21 14:05:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:30,299 INFO L225 Difference]: With dead ends: 271 [2020-08-21 14:05:30,299 INFO L226 Difference]: Without dead ends: 261 [2020-08-21 14:05:30,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:05:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-21 14:05:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-21 14:05:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-21 14:05:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-21 14:05:30,326 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-21 14:05:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:30,327 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-21 14:05:30,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:05:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-21 14:05:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 14:05:30,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:30,329 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:30,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-21 14:05:30,329 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-21 14:05:30,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:30,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045024400] [2020-08-21 14:05:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 14:05:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 14:05:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 14:05:30,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045024400] [2020-08-21 14:05:30,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:30,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:05:30,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254138389] [2020-08-21 14:05:30,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:05:30,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:30,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:05:30,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:05:30,632 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-21 14:05:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:30,859 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-21 14:05:30,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:30,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-21 14:05:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:30,863 INFO L225 Difference]: With dead ends: 285 [2020-08-21 14:05:30,863 INFO L226 Difference]: Without dead ends: 280 [2020-08-21 14:05:30,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:05:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-21 14:05:30,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-21 14:05:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-21 14:05:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-21 14:05:30,892 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-21 14:05:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:30,893 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-21 14:05:30,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:05:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-21 14:05:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-21 14:05:30,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:30,895 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:30,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-21 14:05:30,896 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-21 14:05:30,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:30,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055705023] [2020-08-21 14:05:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 14:05:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:30,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 14:05:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-21 14:05:31,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055705023] [2020-08-21 14:05:31,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:05:31,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 14:05:31,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771494634] [2020-08-21 14:05:31,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 14:05:31,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 14:05:31,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 14:05:31,003 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-21 14:05:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:31,060 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-21 14:05:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 14:05:31,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-21 14:05:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:31,063 INFO L225 Difference]: With dead ends: 271 [2020-08-21 14:05:31,063 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 14:05:31,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:05:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 14:05:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-21 14:05:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-21 14:05:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-21 14:05:31,094 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-21 14:05:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:31,094 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-21 14:05:31,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 14:05:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-21 14:05:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-21 14:05:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:31,097 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:31,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-21 14:05:31,097 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-21 14:05:31,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:31,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953002874] [2020-08-21 14:05:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 14:05:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 14:05:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 14:05:31,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953002874] [2020-08-21 14:05:31,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:31,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 14:05:31,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351237] [2020-08-21 14:05:31,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 14:05:31,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 14:05:31,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 14:05:31,394 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-21 14:05:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:31,645 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-21 14:05:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:31,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-21 14:05:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:31,649 INFO L225 Difference]: With dead ends: 284 [2020-08-21 14:05:31,649 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 14:05:31,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-21 14:05:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 14:05:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-21 14:05:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-21 14:05:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-21 14:05:31,681 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-21 14:05:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:31,682 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-21 14:05:31,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 14:05:31,682 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-21 14:05:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 14:05:31,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:31,684 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:31,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-21 14:05:31,685 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-21 14:05:31,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:31,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953543556] [2020-08-21 14:05:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 14:05:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 14:05:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 14:05:31,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953543556] [2020-08-21 14:05:31,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:05:31,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:05:31,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395453381] [2020-08-21 14:05:31,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:05:31,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:05:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:05:31,897 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-21 14:05:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:32,008 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-21 14:05:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:05:32,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-21 14:05:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:32,010 INFO L225 Difference]: With dead ends: 303 [2020-08-21 14:05:32,010 INFO L226 Difference]: Without dead ends: 280 [2020-08-21 14:05:32,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:05:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-21 14:05:32,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-21 14:05:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-21 14:05:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-21 14:05:32,048 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-21 14:05:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:32,048 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-21 14:05:32,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:05:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-21 14:05:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 14:05:32,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:32,051 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:32,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-21 14:05:32,052 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-21 14:05:32,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:32,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126525250] [2020-08-21 14:05:32,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 14:05:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 14:05:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 14:05:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 14:05:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-21 14:05:32,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126525250] [2020-08-21 14:05:32,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:32,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 14:05:32,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795645862] [2020-08-21 14:05:32,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:05:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:05:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:05:32,201 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-21 14:05:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:32,296 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-21 14:05:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:05:32,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-21 14:05:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:32,298 INFO L225 Difference]: With dead ends: 409 [2020-08-21 14:05:32,298 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 14:05:32,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:05:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 14:05:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-21 14:05:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 14:05:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-21 14:05:32,321 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-21 14:05:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:32,321 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-21 14:05:32,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:05:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-21 14:05:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 14:05:32,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:32,323 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:32,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-21 14:05:32,323 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-21 14:05:32,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:32,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778375225] [2020-08-21 14:05:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 14:05:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 14:05:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-21 14:05:32,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778375225] [2020-08-21 14:05:32,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:32,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 14:05:32,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403998510] [2020-08-21 14:05:32,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 14:05:32,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:32,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 14:05:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:05:32,482 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-21 14:05:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:32,610 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-21 14:05:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 14:05:32,611 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-21 14:05:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:32,612 INFO L225 Difference]: With dead ends: 173 [2020-08-21 14:05:32,612 INFO L226 Difference]: Without dead ends: 163 [2020-08-21 14:05:32,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:05:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-21 14:05:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-21 14:05:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-21 14:05:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-21 14:05:32,630 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-21 14:05:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:32,631 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-21 14:05:32,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 14:05:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-21 14:05:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 14:05:32,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:32,632 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:32,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-21 14:05:32,632 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:32,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-21 14:05:32,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:32,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754043263] [2020-08-21 14:05:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 14:05:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 14:05:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-21 14:05:32,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754043263] [2020-08-21 14:05:32,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:32,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:05:32,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856558576] [2020-08-21 14:05:32,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:05:32,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:32,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:05:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:05:32,931 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-21 14:05:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:33,196 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-21 14:05:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:05:33,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-21 14:05:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:33,199 INFO L225 Difference]: With dead ends: 175 [2020-08-21 14:05:33,199 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 14:05:33,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-21 14:05:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 14:05:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-21 14:05:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 14:05:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-21 14:05:33,214 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-21 14:05:33,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:33,215 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-21 14:05:33,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:05:33,215 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-21 14:05:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 14:05:33,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:33,217 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:33,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-21 14:05:33,217 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-21 14:05:33,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:33,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099921470] [2020-08-21 14:05:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 14:05:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 14:05:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-21 14:05:33,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099921470] [2020-08-21 14:05:33,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:05:33,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-21 14:05:33,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825333265] [2020-08-21 14:05:33,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:05:33,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:05:33,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:05:33,504 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-21 14:05:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:33,737 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-21 14:05:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:33,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-21 14:05:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:33,739 INFO L225 Difference]: With dead ends: 184 [2020-08-21 14:05:33,739 INFO L226 Difference]: Without dead ends: 174 [2020-08-21 14:05:33,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:05:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-21 14:05:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-21 14:05:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-21 14:05:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-21 14:05:33,762 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-21 14:05:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:33,763 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-21 14:05:33,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:05:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-21 14:05:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 14:05:33,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:33,769 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:33,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-21 14:05:33,769 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:33,772 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-21 14:05:33,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:33,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179066237] [2020-08-21 14:05:33,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:33,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 14:05:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 14:05:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 14:05:34,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179066237] [2020-08-21 14:05:34,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:34,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:05:34,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143739978] [2020-08-21 14:05:34,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:05:34,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:05:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:05:34,109 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-21 14:05:34,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:34,300 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-21 14:05:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:34,301 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-21 14:05:34,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:34,302 INFO L225 Difference]: With dead ends: 194 [2020-08-21 14:05:34,302 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 14:05:34,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-21 14:05:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 14:05:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-21 14:05:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 14:05:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-21 14:05:34,320 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-21 14:05:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:34,320 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-21 14:05:34,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:05:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-21 14:05:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 14:05:34,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:34,322 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:34,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-21 14:05:34,322 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:34,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-21 14:05:34,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:34,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133132781] [2020-08-21 14:05:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 14:05:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 14:05:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-21 14:05:34,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133132781] [2020-08-21 14:05:34,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:34,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:05:34,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294192671] [2020-08-21 14:05:34,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:05:34,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:05:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:05:34,551 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-21 14:05:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:34,731 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-21 14:05:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:34,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-21 14:05:34,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:34,733 INFO L225 Difference]: With dead ends: 160 [2020-08-21 14:05:34,733 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 14:05:34,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:05:34,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 14:05:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-21 14:05:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 14:05:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-21 14:05:34,751 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-21 14:05:34,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:34,751 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-21 14:05:34,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:05:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-21 14:05:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 14:05:34,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:34,752 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:34,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-21 14:05:34,753 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:34,753 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-21 14:05:34,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:34,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668673979] [2020-08-21 14:05:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:34,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 14:05:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 14:05:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 14:05:35,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668673979] [2020-08-21 14:05:35,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:35,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 14:05:35,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529137437] [2020-08-21 14:05:35,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 14:05:35,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 14:05:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:05:35,119 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-21 14:05:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:35,403 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-21 14:05:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 14:05:35,406 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-21 14:05:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:35,407 INFO L225 Difference]: With dead ends: 155 [2020-08-21 14:05:35,407 INFO L226 Difference]: Without dead ends: 137 [2020-08-21 14:05:35,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:05:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-21 14:05:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-21 14:05:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 14:05:35,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-21 14:05:35,420 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-21 14:05:35,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:35,420 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-21 14:05:35,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 14:05:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-21 14:05:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 14:05:35,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:05:35,422 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:05:35,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-21 14:05:35,422 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:05:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:05:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-21 14:05:35,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:05:35,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560679724] [2020-08-21 14:05:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:05:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:05:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:05:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 14:05:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 14:05:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 14:05:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 14:05:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:05:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-21 14:05:35,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560679724] [2020-08-21 14:05:35,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:05:35,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 14:05:35,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141642770] [2020-08-21 14:05:35,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 14:05:35,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:05:35,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 14:05:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 14:05:35,764 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-21 14:05:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:05:35,931 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-21 14:05:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 14:05:35,932 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-21 14:05:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:05:35,932 INFO L225 Difference]: With dead ends: 137 [2020-08-21 14:05:35,932 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:05:35,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:05:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:05:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:05:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:05:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:05:35,934 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-21 14:05:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:05:35,935 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:05:35,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 14:05:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:05:35,935 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:05:35,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-21 14:05:35,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:05:36,617 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136