/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:17:16,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:17:16,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:17:16,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:17:16,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:17:16,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:17:16,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:17:16,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:17:16,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:17:16,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:17:16,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:17:16,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:17:16,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:17:16,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:17:16,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:17:16,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:17:16,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:17:16,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:17:16,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:17:16,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:17:16,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:17:16,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:17:16,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:17:16,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:17:16,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:17:16,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:17:16,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:17:16,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:17:16,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:17:16,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 10:17:16,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:17:16,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:17:16,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:17:16,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:17:16,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:17:16,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:17:16,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:17:16,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:17:16,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:17:16,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:17:16,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:17:16,672 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 [2020-09-21 10:17:16,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:17:16,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:17:16,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:17:16,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:17:16,717 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:17:16,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:17:16,717 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:17:16,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:17:16,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:17:16,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:17:16,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:17:16,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:17:16,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:17:16,719 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:17:16,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:17:16,720 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:17:16,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:17:16,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:17:16,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:17:16,721 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:17:16,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:17:16,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:17:16,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:17:16,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:17:16,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:17:16,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:17:16,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:17:16,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:17:16,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:17:16,723 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 -> false [2020-09-21 10:17:17,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:17:17,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:17:17,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:17:17,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:17:17,241 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:17:17,242 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-09-21 10:17:17,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98a60ca72/b59705b4a8274b348f1061afa27d9674/FLAGe79ed1607 [2020-09-21 10:17:17,879 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:17:17,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-09-21 10:17:17,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98a60ca72/b59705b4a8274b348f1061afa27d9674/FLAGe79ed1607 [2020-09-21 10:17:18,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/98a60ca72/b59705b4a8274b348f1061afa27d9674 [2020-09-21 10:17:18,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:17:18,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:17:18,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:18,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:17:18,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:17:18,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c489c92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18, skipping insertion in model container [2020-09-21 10:17:18,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:17:18,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:17:18,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:18,540 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:17:18,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:17:18,699 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:17:18,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18 WrapperNode [2020-09-21 10:17:18,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:17:18,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:17:18,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:17:18,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:17:18,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (1/1) ... [2020-09-21 10:17:18,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:17:18,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:17:18,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:17:18,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:17:18,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (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 [2020-09-21 10:17:18,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:17:18,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:17:18,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:17:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-09-21 10:17:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-09-21 10:17:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-09-21 10:17:18,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:17:18,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:17:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-21 10:17:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 10:17:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:17:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-09-21 10:17:18,834 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-09-21 10:17:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-09-21 10:17:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:17:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:17:18,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:17:19,293 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:17:19,293 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 10:17:19,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:19 BoogieIcfgContainer [2020-09-21 10:17:19,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:17:19,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:17:19,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:17:19,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:17:19,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:17:18" (1/3) ... [2020-09-21 10:17:19,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f010813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:19, skipping insertion in model container [2020-09-21 10:17:19,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:17:18" (2/3) ... [2020-09-21 10:17:19,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f010813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:17:19, skipping insertion in model container [2020-09-21 10:17:19,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:17:19" (3/3) ... [2020-09-21 10:17:19,307 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-09-21 10:17:19,317 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:17:19,327 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:17:19,348 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:17:19,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:17:19,375 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:17:19,375 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:17:19,375 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:17:19,375 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:17:19,375 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:17:19,376 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:17:19,376 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:17:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-09-21 10:17:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 10:17:19,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:19,406 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] [2020-09-21 10:17:19,407 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:19,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-09-21 10:17:19,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:19,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813073734] [2020-09-21 10:17:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:19,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:19,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:19,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:19,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 10:17:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:19,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-09-21 10:17:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:19,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:17:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:19,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813073734] [2020-09-21 10:17:19,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:19,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 10:17:19,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277066386] [2020-09-21 10:17:19,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:17:19,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:19,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:17:19,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:17:19,795 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-09-21 10:17:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:19,951 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-09-21 10:17:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:17:19,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-09-21 10:17:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:19,975 INFO L225 Difference]: With dead ends: 136 [2020-09-21 10:17:19,976 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 10:17:19,982 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 [2020-09-21 10:17:20,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 10:17:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-09-21 10:17:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-21 10:17:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-09-21 10:17:20,049 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-09-21 10:17:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:20,050 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-09-21 10:17:20,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:17:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-09-21 10:17:20,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-21 10:17:20,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:20,054 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] [2020-09-21 10:17:20,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:17:20,055 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:20,055 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-09-21 10:17:20,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:20,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814635122] [2020-09-21 10:17:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-21 10:17:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 10:17:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:17:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:20,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814635122] [2020-09-21 10:17:20,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:20,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-21 10:17:20,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569853532] [2020-09-21 10:17:20,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:17:20,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:20,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:17:20,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:17:20,209 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-09-21 10:17:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:20,295 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-09-21 10:17:20,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:17:20,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-09-21 10:17:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:20,299 INFO L225 Difference]: With dead ends: 129 [2020-09-21 10:17:20,299 INFO L226 Difference]: Without dead ends: 79 [2020-09-21 10:17:20,301 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 [2020-09-21 10:17:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-21 10:17:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-09-21 10:17:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-21 10:17:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-09-21 10:17:20,334 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-09-21 10:17:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:20,335 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-09-21 10:17:20,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:17:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-09-21 10:17:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 10:17:20,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:20,339 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] [2020-09-21 10:17:20,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:17:20,339 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-09-21 10:17:20,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:20,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158739519] [2020-09-21 10:17:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-21 10:17:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:17:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:17:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:20,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158739519] [2020-09-21 10:17:20,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:20,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:17:20,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741814175] [2020-09-21 10:17:20,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:17:20,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:20,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:17:20,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:17:20,517 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-09-21 10:17:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:20,617 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-09-21 10:17:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:17:20,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-09-21 10:17:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:20,620 INFO L225 Difference]: With dead ends: 145 [2020-09-21 10:17:20,620 INFO L226 Difference]: Without dead ends: 89 [2020-09-21 10:17:20,621 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 [2020-09-21 10:17:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-21 10:17:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-21 10:17:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-21 10:17:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-09-21 10:17:20,635 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-09-21 10:17:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:20,636 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-09-21 10:17:20,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:17:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-09-21 10:17:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 10:17:20,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:20,638 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] [2020-09-21 10:17:20,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:17:20,639 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:20,639 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-09-21 10:17:20,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:20,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902223757] [2020-09-21 10:17:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 10:17:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:17:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:17:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:20,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902223757] [2020-09-21 10:17:20,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:20,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:17:20,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842141289] [2020-09-21 10:17:20,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:17:20,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:20,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:17:20,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:17:20,738 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-09-21 10:17:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:20,813 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-09-21 10:17:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:17:20,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-09-21 10:17:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:20,816 INFO L225 Difference]: With dead ends: 156 [2020-09-21 10:17:20,816 INFO L226 Difference]: Without dead ends: 93 [2020-09-21 10:17:20,818 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 [2020-09-21 10:17:20,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-21 10:17:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-09-21 10:17:20,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 10:17:20,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-09-21 10:17:20,831 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-09-21 10:17:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:20,832 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-09-21 10:17:20,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:17:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-09-21 10:17:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 10:17:20,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:20,835 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] [2020-09-21 10:17:20,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:17:20,836 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-09-21 10:17:20,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:20,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139648969] [2020-09-21 10:17:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 10:17:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:17:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:20,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:17:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:21,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139648969] [2020-09-21 10:17:21,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:21,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:17:21,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455163823] [2020-09-21 10:17:21,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:17:21,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:21,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:17:21,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:17:21,004 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-09-21 10:17:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:21,129 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-09-21 10:17:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:17:21,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-09-21 10:17:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:21,131 INFO L225 Difference]: With dead ends: 166 [2020-09-21 10:17:21,133 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 10:17:21,135 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 [2020-09-21 10:17:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 10:17:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-09-21 10:17:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-21 10:17:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-09-21 10:17:21,166 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-09-21 10:17:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:21,166 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-09-21 10:17:21,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:17:21,167 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-09-21 10:17:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-21 10:17:21,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:21,174 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] [2020-09-21 10:17:21,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:17:21,175 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-09-21 10:17:21,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:21,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511690767] [2020-09-21 10:17:21,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:17:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 10:17:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:17:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:21,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511690767] [2020-09-21 10:17:21,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:21,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:17:21,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495830006] [2020-09-21 10:17:21,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:17:21,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:17:21,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:17:21,352 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-09-21 10:17:21,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:21,451 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-09-21 10:17:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:17:21,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-09-21 10:17:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:21,453 INFO L225 Difference]: With dead ends: 176 [2020-09-21 10:17:21,453 INFO L226 Difference]: Without dead ends: 110 [2020-09-21 10:17:21,454 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 [2020-09-21 10:17:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-21 10:17:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-09-21 10:17:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-21 10:17:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-09-21 10:17:21,466 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-09-21 10:17:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:21,467 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-09-21 10:17:21,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:17:21,467 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-09-21 10:17:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-21 10:17:21,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:21,469 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] [2020-09-21 10:17:21,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:17:21,469 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-09-21 10:17:21,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:21,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53604024] [2020-09-21 10:17:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-21 10:17:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:17:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:17:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:21,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53604024] [2020-09-21 10:17:21,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:21,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:17:21,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600157119] [2020-09-21 10:17:21,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:17:21,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:21,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:17:21,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:17:21,620 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-09-21 10:17:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:21,741 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-09-21 10:17:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:17:21,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-09-21 10:17:21,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:21,743 INFO L225 Difference]: With dead ends: 178 [2020-09-21 10:17:21,743 INFO L226 Difference]: Without dead ends: 115 [2020-09-21 10:17:21,744 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 [2020-09-21 10:17:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-21 10:17:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-09-21 10:17:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-21 10:17:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-09-21 10:17:21,756 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-09-21 10:17:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:21,756 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-09-21 10:17:21,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:17:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-09-21 10:17:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 10:17:21,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:21,758 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] [2020-09-21 10:17:21,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:17:21,758 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-09-21 10:17:21,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:21,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517359277] [2020-09-21 10:17:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 10:17:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-09-21 10:17:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-21 10:17:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:21,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517359277] [2020-09-21 10:17:21,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:21,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:17:21,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522116663] [2020-09-21 10:17:21,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:17:21,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:21,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:17:21,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:17:21,868 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-09-21 10:17:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:21,964 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-09-21 10:17:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:17:21,965 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-09-21 10:17:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:21,967 INFO L225 Difference]: With dead ends: 193 [2020-09-21 10:17:21,968 INFO L226 Difference]: Without dead ends: 124 [2020-09-21 10:17:21,969 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 [2020-09-21 10:17:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-21 10:17:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-09-21 10:17:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-21 10:17:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-09-21 10:17:21,980 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-09-21 10:17:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:21,981 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-09-21 10:17:21,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:17:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-09-21 10:17:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 10:17:21,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:21,983 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] [2020-09-21 10:17:21,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:17:21,984 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-09-21 10:17:21,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:21,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701335177] [2020-09-21 10:17:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 10:17:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:17:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:17:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:22,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701335177] [2020-09-21 10:17:22,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:22,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:17:22,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042787660] [2020-09-21 10:17:22,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:17:22,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:22,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:17:22,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:17:22,151 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-09-21 10:17:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:22,322 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-09-21 10:17:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:17:22,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-09-21 10:17:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:22,324 INFO L225 Difference]: With dead ends: 190 [2020-09-21 10:17:22,325 INFO L226 Difference]: Without dead ends: 124 [2020-09-21 10:17:22,325 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 [2020-09-21 10:17:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-21 10:17:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-09-21 10:17:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 10:17:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-09-21 10:17:22,336 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-09-21 10:17:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:22,337 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-09-21 10:17:22,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:17:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-09-21 10:17:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-21 10:17:22,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:22,338 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] [2020-09-21 10:17:22,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:17:22,339 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-09-21 10:17:22,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:22,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524750779] [2020-09-21 10:17:22,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-21 10:17:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 10:17:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:17:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:22,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524750779] [2020-09-21 10:17:22,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:22,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:17:22,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777074278] [2020-09-21 10:17:22,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:17:22,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:17:22,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:17:22,462 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-09-21 10:17:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:22,564 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-09-21 10:17:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:17:22,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-09-21 10:17:22,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:22,567 INFO L225 Difference]: With dead ends: 210 [2020-09-21 10:17:22,567 INFO L226 Difference]: Without dead ends: 138 [2020-09-21 10:17:22,568 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 [2020-09-21 10:17:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-21 10:17:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-09-21 10:17:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-21 10:17:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-09-21 10:17:22,578 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-09-21 10:17:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:22,578 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-09-21 10:17:22,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:17:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-09-21 10:17:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-21 10:17:22,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:22,580 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] [2020-09-21 10:17:22,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:17:22,580 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-09-21 10:17:22,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:22,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621318649] [2020-09-21 10:17:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-09-21 10:17:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:17:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:17:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:22,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621318649] [2020-09-21 10:17:22,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:22,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:17:22,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283662540] [2020-09-21 10:17:22,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:17:22,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:22,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:17:22,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:17:22,766 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-09-21 10:17:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:22,909 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-09-21 10:17:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:17:22,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-09-21 10:17:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:22,911 INFO L225 Difference]: With dead ends: 202 [2020-09-21 10:17:22,911 INFO L226 Difference]: Without dead ends: 133 [2020-09-21 10:17:22,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:17:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-21 10:17:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-09-21 10:17:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-21 10:17:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-09-21 10:17:22,923 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-09-21 10:17:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:22,923 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-09-21 10:17:22,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:17:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-09-21 10:17:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 10:17:22,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:22,925 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] [2020-09-21 10:17:22,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:17:22,925 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-09-21 10:17:22,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:22,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615517547] [2020-09-21 10:17:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:22,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 10:17:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-21 10:17:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-21 10:17:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:23,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615517547] [2020-09-21 10:17:23,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:23,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:17:23,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815591890] [2020-09-21 10:17:23,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:17:23,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:17:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:17:23,090 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-09-21 10:17:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:23,217 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-09-21 10:17:23,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:17:23,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-09-21 10:17:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:23,219 INFO L225 Difference]: With dead ends: 227 [2020-09-21 10:17:23,220 INFO L226 Difference]: Without dead ends: 152 [2020-09-21 10:17:23,220 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 [2020-09-21 10:17:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-21 10:17:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-09-21 10:17:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-21 10:17:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-09-21 10:17:23,230 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-09-21 10:17:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:23,231 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-09-21 10:17:23,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:17:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-09-21 10:17:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-21 10:17:23,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:23,232 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] [2020-09-21 10:17:23,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:17:23,233 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-09-21 10:17:23,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:23,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998676858] [2020-09-21 10:17:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 10:17:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-21 10:17:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-21 10:17:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:23,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998676858] [2020-09-21 10:17:23,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:23,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:17:23,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108731404] [2020-09-21 10:17:23,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:17:23,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:17:23,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:17:23,459 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-09-21 10:17:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:23,670 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-09-21 10:17:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:17:23,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-09-21 10:17:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:23,673 INFO L225 Difference]: With dead ends: 214 [2020-09-21 10:17:23,673 INFO L226 Difference]: Without dead ends: 142 [2020-09-21 10:17:23,674 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 [2020-09-21 10:17:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-21 10:17:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-09-21 10:17:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-21 10:17:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-09-21 10:17:23,684 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-09-21 10:17:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:23,684 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-09-21 10:17:23,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:17:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-09-21 10:17:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 10:17:23,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:23,686 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] [2020-09-21 10:17:23,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:17:23,686 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-09-21 10:17:23,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:23,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810914217] [2020-09-21 10:17:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-09-21 10:17:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 10:17:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:17:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:23,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810914217] [2020-09-21 10:17:23,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:23,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:17:23,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918472762] [2020-09-21 10:17:23,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:17:23,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:23,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:17:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:17:23,843 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-09-21 10:17:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:23,978 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-09-21 10:17:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:17:23,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-21 10:17:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:23,980 INFO L225 Difference]: With dead ends: 244 [2020-09-21 10:17:23,981 INFO L226 Difference]: Without dead ends: 166 [2020-09-21 10:17:23,982 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 [2020-09-21 10:17:23,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-21 10:17:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-09-21 10:17:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-21 10:17:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-09-21 10:17:23,992 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-09-21 10:17:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:23,993 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-09-21 10:17:23,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:17:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-09-21 10:17:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-21 10:17:23,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:23,995 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] [2020-09-21 10:17:23,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:17:23,995 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:23,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:23,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-09-21 10:17:23,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:23,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454099838] [2020-09-21 10:17:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-21 10:17:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:17:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:17:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:24,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454099838] [2020-09-21 10:17:24,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:24,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:17:24,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876743849] [2020-09-21 10:17:24,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:17:24,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:24,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:17:24,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:17:24,244 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-09-21 10:17:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:24,479 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-09-21 10:17:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:17:24,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-09-21 10:17:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:24,481 INFO L225 Difference]: With dead ends: 226 [2020-09-21 10:17:24,481 INFO L226 Difference]: Without dead ends: 151 [2020-09-21 10:17:24,484 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 [2020-09-21 10:17:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-21 10:17:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-09-21 10:17:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-21 10:17:24,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-09-21 10:17:24,500 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-09-21 10:17:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:24,500 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-09-21 10:17:24,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:17:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-09-21 10:17:24,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 10:17:24,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:24,502 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] [2020-09-21 10:17:24,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:17:24,502 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:24,503 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-09-21 10:17:24,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:24,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798183777] [2020-09-21 10:17:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 10:17:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-09-21 10:17:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 10:17:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:24,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798183777] [2020-09-21 10:17:24,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:24,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:17:24,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133100037] [2020-09-21 10:17:24,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:17:24,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:24,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:17:24,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:17:24,669 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-09-21 10:17:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:24,794 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-09-21 10:17:24,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:17:24,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-09-21 10:17:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:24,796 INFO L225 Difference]: With dead ends: 261 [2020-09-21 10:17:24,796 INFO L226 Difference]: Without dead ends: 180 [2020-09-21 10:17:24,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:17:24,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-21 10:17:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-09-21 10:17:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-21 10:17:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-09-21 10:17:24,817 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-09-21 10:17:24,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:24,819 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-09-21 10:17:24,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:17:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-09-21 10:17:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-21 10:17:24,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:24,820 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] [2020-09-21 10:17:24,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:17:24,821 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:24,821 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-09-21 10:17:24,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:24,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404139872] [2020-09-21 10:17:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:24,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 10:17:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-21 10:17:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-21 10:17:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:25,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404139872] [2020-09-21 10:17:25,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:25,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:17:25,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068499310] [2020-09-21 10:17:25,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:17:25,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:17:25,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:17:25,160 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-09-21 10:17:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:25,402 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-09-21 10:17:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:17:25,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-09-21 10:17:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:25,404 INFO L225 Difference]: With dead ends: 238 [2020-09-21 10:17:25,404 INFO L226 Difference]: Without dead ends: 160 [2020-09-21 10:17:25,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:17:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-21 10:17:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-09-21 10:17:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-21 10:17:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-09-21 10:17:25,416 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-09-21 10:17:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:25,416 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-09-21 10:17:25,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:17:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-09-21 10:17:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-21 10:17:25,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:25,417 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] [2020-09-21 10:17:25,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 10:17:25,418 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-09-21 10:17:25,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:25,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261290913] [2020-09-21 10:17:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-21 10:17:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-21 10:17:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:17:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:25,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261290913] [2020-09-21 10:17:25,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:25,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:17:25,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203911402] [2020-09-21 10:17:25,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:17:25,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:17:25,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:17:25,615 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-09-21 10:17:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:25,795 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-09-21 10:17:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:17:25,796 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-09-21 10:17:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:25,797 INFO L225 Difference]: With dead ends: 278 [2020-09-21 10:17:25,798 INFO L226 Difference]: Without dead ends: 194 [2020-09-21 10:17:25,799 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 [2020-09-21 10:17:25,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-21 10:17:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-09-21 10:17:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-21 10:17:25,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-09-21 10:17:25,816 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-09-21 10:17:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:25,816 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-09-21 10:17:25,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:17:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-09-21 10:17:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-21 10:17:25,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:25,818 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] [2020-09-21 10:17:25,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 10:17:25,818 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:25,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-09-21 10:17:25,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:25,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031388674] [2020-09-21 10:17:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:25,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-21 10:17:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:17:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:17:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:26,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031388674] [2020-09-21 10:17:26,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:26,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:17:26,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240119921] [2020-09-21 10:17:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:17:26,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:17:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:17:26,162 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-09-21 10:17:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:26,418 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-09-21 10:17:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:17:26,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-09-21 10:17:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:26,420 INFO L225 Difference]: With dead ends: 250 [2020-09-21 10:17:26,420 INFO L226 Difference]: Without dead ends: 169 [2020-09-21 10:17:26,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:17:26,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-21 10:17:26,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-09-21 10:17:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-21 10:17:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-09-21 10:17:26,431 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-09-21 10:17:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:26,431 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-09-21 10:17:26,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:17:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-09-21 10:17:26,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-21 10:17:26,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:26,433 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] [2020-09-21 10:17:26,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 10:17:26,433 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-09-21 10:17:26,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:26,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269817699] [2020-09-21 10:17:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:26,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 10:17:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-21 10:17:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 10:17:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:26,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269817699] [2020-09-21 10:17:26,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:26,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:17:26,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001080506] [2020-09-21 10:17:26,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:17:26,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:26,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:17:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:17:26,639 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-09-21 10:17:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:26,811 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-09-21 10:17:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:17:26,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-09-21 10:17:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:26,815 INFO L225 Difference]: With dead ends: 295 [2020-09-21 10:17:26,815 INFO L226 Difference]: Without dead ends: 208 [2020-09-21 10:17:26,816 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 [2020-09-21 10:17:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-21 10:17:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-09-21 10:17:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-21 10:17:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-09-21 10:17:26,831 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-09-21 10:17:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:26,831 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-09-21 10:17:26,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:17:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-09-21 10:17:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-21 10:17:26,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:26,834 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] [2020-09-21 10:17:26,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 10:17:26,834 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-09-21 10:17:26,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:26,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362294219] [2020-09-21 10:17:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:26,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-21 10:17:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 10:17:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 10:17:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:27,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362294219] [2020-09-21 10:17:27,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:27,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:17:27,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244819509] [2020-09-21 10:17:27,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:17:27,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:27,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:17:27,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:17:27,157 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-09-21 10:17:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:27,536 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-09-21 10:17:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:17:27,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-09-21 10:17:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:27,538 INFO L225 Difference]: With dead ends: 262 [2020-09-21 10:17:27,538 INFO L226 Difference]: Without dead ends: 178 [2020-09-21 10:17:27,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:17:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-21 10:17:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-09-21 10:17:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-21 10:17:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-09-21 10:17:27,551 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-09-21 10:17:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:27,551 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-09-21 10:17:27,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:17:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-09-21 10:17:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-21 10:17:27,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:27,553 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] [2020-09-21 10:17:27,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 10:17:27,553 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-09-21 10:17:27,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:27,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612690026] [2020-09-21 10:17:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-21 10:17:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-21 10:17:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:17:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:27,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612690026] [2020-09-21 10:17:27,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:27,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:17:27,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407221030] [2020-09-21 10:17:27,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:17:27,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:27,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:17:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:17:27,763 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-09-21 10:17:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:27,931 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-09-21 10:17:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:17:27,932 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-09-21 10:17:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:27,934 INFO L225 Difference]: With dead ends: 312 [2020-09-21 10:17:27,934 INFO L226 Difference]: Without dead ends: 222 [2020-09-21 10:17:27,935 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 [2020-09-21 10:17:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-21 10:17:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-09-21 10:17:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-21 10:17:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-09-21 10:17:27,946 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-09-21 10:17:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:27,947 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-09-21 10:17:27,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:17:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-09-21 10:17:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-21 10:17:27,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:27,948 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] [2020-09-21 10:17:27,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 10:17:27,948 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-09-21 10:17:27,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:27,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806822134] [2020-09-21 10:17:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:27,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-09-21 10:17:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:17:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:17:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:28,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806822134] [2020-09-21 10:17:28,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:28,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:17:28,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099254154] [2020-09-21 10:17:28,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:17:28,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:17:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:17:28,339 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-09-21 10:17:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:28,737 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-09-21 10:17:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:17:28,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-09-21 10:17:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:28,739 INFO L225 Difference]: With dead ends: 274 [2020-09-21 10:17:28,739 INFO L226 Difference]: Without dead ends: 187 [2020-09-21 10:17:28,740 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 [2020-09-21 10:17:28,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-21 10:17:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-09-21 10:17:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-21 10:17:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-09-21 10:17:28,752 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-09-21 10:17:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:28,752 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-09-21 10:17:28,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:17:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-09-21 10:17:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-21 10:17:28,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:28,753 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] [2020-09-21 10:17:28,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 10:17:28,754 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-09-21 10:17:28,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:28,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653023504] [2020-09-21 10:17:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-21 10:17:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-21 10:17:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-21 10:17:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:28,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653023504] [2020-09-21 10:17:28,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:28,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 10:17:28,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047075578] [2020-09-21 10:17:28,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 10:17:28,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 10:17:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:17:28,999 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-09-21 10:17:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:29,174 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-09-21 10:17:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:17:29,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-09-21 10:17:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:29,176 INFO L225 Difference]: With dead ends: 329 [2020-09-21 10:17:29,176 INFO L226 Difference]: Without dead ends: 236 [2020-09-21 10:17:29,177 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 [2020-09-21 10:17:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-21 10:17:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-09-21 10:17:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-21 10:17:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-09-21 10:17:29,189 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-09-21 10:17:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:29,189 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-09-21 10:17:29,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 10:17:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-09-21 10:17:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 10:17:29,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:29,191 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] [2020-09-21 10:17:29,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 10:17:29,194 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:29,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-09-21 10:17:29,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:29,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553120260] [2020-09-21 10:17:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:29,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:29,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:29,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:29,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-21 10:17:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:29,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 10:17:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:29,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-21 10:17:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:29,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553120260] [2020-09-21 10:17:29,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:29,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:17:29,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321754691] [2020-09-21 10:17:29,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:17:29,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:17:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:17:29,590 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-09-21 10:17:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:30,028 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-09-21 10:17:30,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:17:30,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-09-21 10:17:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:30,030 INFO L225 Difference]: With dead ends: 286 [2020-09-21 10:17:30,030 INFO L226 Difference]: Without dead ends: 196 [2020-09-21 10:17:30,031 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 [2020-09-21 10:17:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-21 10:17:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-09-21 10:17:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-21 10:17:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-09-21 10:17:30,046 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-09-21 10:17:30,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:30,047 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-09-21 10:17:30,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:17:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-09-21 10:17:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-21 10:17:30,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:30,048 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] [2020-09-21 10:17:30,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 10:17:30,048 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-09-21 10:17:30,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:30,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336915637] [2020-09-21 10:17:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-09-21 10:17:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:17:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:17:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:30,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336915637] [2020-09-21 10:17:30,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:30,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 10:17:30,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479323291] [2020-09-21 10:17:30,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 10:17:30,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 10:17:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:17:30,312 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-09-21 10:17:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:30,508 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-09-21 10:17:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 10:17:30,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-09-21 10:17:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:30,510 INFO L225 Difference]: With dead ends: 346 [2020-09-21 10:17:30,511 INFO L226 Difference]: Without dead ends: 250 [2020-09-21 10:17:30,512 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 [2020-09-21 10:17:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-21 10:17:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-09-21 10:17:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-21 10:17:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-09-21 10:17:30,532 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-09-21 10:17:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:30,532 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-09-21 10:17:30,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 10:17:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-09-21 10:17:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-21 10:17:30,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:30,535 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] [2020-09-21 10:17:30,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 10:17:30,535 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-09-21 10:17:30,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:30,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519057917] [2020-09-21 10:17:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-21 10:17:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:17:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:17:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-09-21 10:17:30,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519057917] [2020-09-21 10:17:30,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:30,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:17:30,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223724238] [2020-09-21 10:17:30,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:17:30,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:30,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:17:30,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:17:30,631 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-09-21 10:17:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:30,648 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-09-21 10:17:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:17:30,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-09-21 10:17:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:30,651 INFO L225 Difference]: With dead ends: 160 [2020-09-21 10:17:30,651 INFO L226 Difference]: Without dead ends: 149 [2020-09-21 10:17:30,651 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 [2020-09-21 10:17:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-21 10:17:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-09-21 10:17:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-21 10:17:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-09-21 10:17:30,669 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-09-21 10:17:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:30,670 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-09-21 10:17:30,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:17:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-09-21 10:17:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 10:17:30,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:30,673 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] [2020-09-21 10:17:30,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 10:17:30,673 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-09-21 10:17:30,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:30,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247412571] [2020-09-21 10:17:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-21 10:17:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:17:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:17:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-09-21 10:17:30,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247412571] [2020-09-21 10:17:30,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:30,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:17:30,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132726087] [2020-09-21 10:17:30,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:17:30,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:17:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:17:30,806 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-09-21 10:17:30,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:30,839 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-09-21 10:17:30,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:17:30,839 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-09-21 10:17:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:30,841 INFO L225 Difference]: With dead ends: 161 [2020-09-21 10:17:30,841 INFO L226 Difference]: Without dead ends: 149 [2020-09-21 10:17:30,842 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 [2020-09-21 10:17:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-21 10:17:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-09-21 10:17:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-21 10:17:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-09-21 10:17:30,853 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-09-21 10:17:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:30,853 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-09-21 10:17:30,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:17:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-09-21 10:17:30,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-21 10:17:30,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:30,855 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] [2020-09-21 10:17:30,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 10:17:30,855 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-09-21 10:17:30,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:30,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063292876] [2020-09-21 10:17:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:30,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:31,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-09-21 10:17:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:31,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:17:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:31,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:17:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:31,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063292876] [2020-09-21 10:17:31,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:31,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:17:31,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110603347] [2020-09-21 10:17:31,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:17:31,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:31,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:17:31,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:17:31,286 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-09-21 10:17:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:31,871 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-09-21 10:17:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:17:31,872 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-09-21 10:17:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:31,873 INFO L225 Difference]: With dead ends: 298 [2020-09-21 10:17:31,874 INFO L226 Difference]: Without dead ends: 205 [2020-09-21 10:17:31,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:17:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-21 10:17:31,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-09-21 10:17:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-21 10:17:31,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-09-21 10:17:31,892 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-09-21 10:17:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:31,892 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-09-21 10:17:31,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:17:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-09-21 10:17:31,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-21 10:17:31,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:31,893 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] [2020-09-21 10:17:31,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 10:17:31,894 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:31,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-09-21 10:17:31,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:31,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078905251] [2020-09-21 10:17:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:31,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:31,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:31,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-09-21 10:17:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-21 10:17:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:17:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:32,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078905251] [2020-09-21 10:17:32,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:32,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 10:17:32,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078034779] [2020-09-21 10:17:32,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 10:17:32,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:32,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 10:17:32,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:17:32,274 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-09-21 10:17:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:32,493 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-09-21 10:17:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 10:17:32,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-09-21 10:17:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:32,495 INFO L225 Difference]: With dead ends: 363 [2020-09-21 10:17:32,495 INFO L226 Difference]: Without dead ends: 264 [2020-09-21 10:17:32,497 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 [2020-09-21 10:17:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-21 10:17:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-09-21 10:17:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-21 10:17:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-09-21 10:17:32,510 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-09-21 10:17:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:32,510 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-09-21 10:17:32,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 10:17:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-09-21 10:17:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-21 10:17:32,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:32,512 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] [2020-09-21 10:17:32,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 10:17:32,512 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-09-21 10:17:32,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:32,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722073893] [2020-09-21 10:17:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-21 10:17:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-21 10:17:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-21 10:17:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:32,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722073893] [2020-09-21 10:17:32,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:32,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 10:17:32,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141201811] [2020-09-21 10:17:32,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 10:17:32,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 10:17:32,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:17:32,953 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-09-21 10:17:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:33,634 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-09-21 10:17:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:17:33,635 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-09-21 10:17:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:33,636 INFO L225 Difference]: With dead ends: 310 [2020-09-21 10:17:33,636 INFO L226 Difference]: Without dead ends: 214 [2020-09-21 10:17:33,637 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 [2020-09-21 10:17:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-21 10:17:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-09-21 10:17:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-21 10:17:33,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-09-21 10:17:33,650 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-09-21 10:17:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:33,650 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-09-21 10:17:33,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 10:17:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-09-21 10:17:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-21 10:17:33,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:33,652 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] [2020-09-21 10:17:33,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 10:17:33,652 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:33,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-09-21 10:17:33,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:33,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262815537] [2020-09-21 10:17:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:33,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:33,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:33,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-09-21 10:17:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-09-21 10:17:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:17:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:34,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262815537] [2020-09-21 10:17:34,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:34,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 10:17:34,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990195673] [2020-09-21 10:17:34,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 10:17:34,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 10:17:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:17:34,081 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-09-21 10:17:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:34,276 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-09-21 10:17:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:17:34,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-09-21 10:17:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:34,279 INFO L225 Difference]: With dead ends: 380 [2020-09-21 10:17:34,279 INFO L226 Difference]: Without dead ends: 278 [2020-09-21 10:17:34,281 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 [2020-09-21 10:17:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-21 10:17:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-09-21 10:17:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-21 10:17:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-09-21 10:17:34,298 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-09-21 10:17:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:34,298 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-09-21 10:17:34,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 10:17:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-09-21 10:17:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-21 10:17:34,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:34,300 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] [2020-09-21 10:17:34,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 10:17:34,300 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-09-21 10:17:34,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:34,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194475753] [2020-09-21 10:17:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-21 10:17:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:17:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:17:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:34,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194475753] [2020-09-21 10:17:34,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:34,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:17:34,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730897764] [2020-09-21 10:17:34,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:17:34,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:17:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:17:34,797 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-09-21 10:17:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:35,509 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-09-21 10:17:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:17:35,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-09-21 10:17:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:35,516 INFO L225 Difference]: With dead ends: 322 [2020-09-21 10:17:35,516 INFO L226 Difference]: Without dead ends: 223 [2020-09-21 10:17:35,519 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 [2020-09-21 10:17:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-21 10:17:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-09-21 10:17:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-21 10:17:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-09-21 10:17:35,534 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-09-21 10:17:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:35,535 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-09-21 10:17:35,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:17:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-09-21 10:17:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 10:17:35,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:35,537 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] [2020-09-21 10:17:35,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 10:17:35,537 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:35,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-09-21 10:17:35,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:35,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911335381] [2020-09-21 10:17:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-21 10:17:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-09-21 10:17:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:35,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-21 10:17:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:36,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911335381] [2020-09-21 10:17:36,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:36,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 10:17:36,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36000221] [2020-09-21 10:17:36,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 10:17:36,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:36,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 10:17:36,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:17:36,019 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-09-21 10:17:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:36,306 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-09-21 10:17:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:17:36,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-09-21 10:17:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:36,309 INFO L225 Difference]: With dead ends: 397 [2020-09-21 10:17:36,309 INFO L226 Difference]: Without dead ends: 292 [2020-09-21 10:17:36,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:17:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-21 10:17:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-09-21 10:17:36,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-21 10:17:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-09-21 10:17:36,328 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-09-21 10:17:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:36,328 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-09-21 10:17:36,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 10:17:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-09-21 10:17:36,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-21 10:17:36,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:36,330 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] [2020-09-21 10:17:36,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 10:17:36,330 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:36,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-09-21 10:17:36,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:36,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144439562] [2020-09-21 10:17:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-21 10:17:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-21 10:17:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-21 10:17:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:36,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144439562] [2020-09-21 10:17:36,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:36,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 10:17:36,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141131395] [2020-09-21 10:17:36,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 10:17:36,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 10:17:36,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:17:36,874 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-09-21 10:17:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:37,700 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-09-21 10:17:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 10:17:37,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-09-21 10:17:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:37,703 INFO L225 Difference]: With dead ends: 334 [2020-09-21 10:17:37,703 INFO L226 Difference]: Without dead ends: 232 [2020-09-21 10:17:37,704 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 [2020-09-21 10:17:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-21 10:17:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-09-21 10:17:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-21 10:17:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-09-21 10:17:37,723 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-09-21 10:17:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:37,724 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-09-21 10:17:37,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 10:17:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-09-21 10:17:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-21 10:17:37,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:37,726 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] [2020-09-21 10:17:37,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 10:17:37,726 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-09-21 10:17:37,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:37,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327126292] [2020-09-21 10:17:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:37,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-09-21 10:17:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-21 10:17:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:17:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:38,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327126292] [2020-09-21 10:17:38,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:38,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 10:17:38,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744949344] [2020-09-21 10:17:38,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 10:17:38,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 10:17:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:17:38,280 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-09-21 10:17:38,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:38,597 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-09-21 10:17:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 10:17:38,598 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-09-21 10:17:38,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:38,600 INFO L225 Difference]: With dead ends: 414 [2020-09-21 10:17:38,600 INFO L226 Difference]: Without dead ends: 306 [2020-09-21 10:17:38,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:17:38,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-09-21 10:17:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-09-21 10:17:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-09-21 10:17:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-09-21 10:17:38,622 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-09-21 10:17:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:38,622 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-09-21 10:17:38,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 10:17:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-09-21 10:17:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-21 10:17:38,624 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:38,624 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] [2020-09-21 10:17:38,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-21 10:17:38,625 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-09-21 10:17:38,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:38,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146617649] [2020-09-21 10:17:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:38,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-21 10:17:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:17:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:17:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:39,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146617649] [2020-09-21 10:17:39,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:39,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:17:39,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905035749] [2020-09-21 10:17:39,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:17:39,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:39,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:17:39,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:17:39,265 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-09-21 10:17:40,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:40,277 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-09-21 10:17:40,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:17:40,278 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-09-21 10:17:40,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:40,281 INFO L225 Difference]: With dead ends: 346 [2020-09-21 10:17:40,282 INFO L226 Difference]: Without dead ends: 241 [2020-09-21 10:17:40,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:17:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-21 10:17:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-09-21 10:17:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-21 10:17:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-09-21 10:17:40,299 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-09-21 10:17:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:40,300 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-09-21 10:17:40,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:17:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-09-21 10:17:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-21 10:17:40,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:40,305 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] [2020-09-21 10:17:40,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-21 10:17:40,305 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-09-21 10:17:40,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:40,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241482770] [2020-09-21 10:17:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-21 10:17:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-09-21 10:17:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-21 10:17:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:40,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241482770] [2020-09-21 10:17:40,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:40,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 10:17:40,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401904416] [2020-09-21 10:17:40,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 10:17:40,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:40,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 10:17:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:17:40,709 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-09-21 10:17:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:40,999 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-09-21 10:17:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 10:17:40,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-09-21 10:17:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:41,002 INFO L225 Difference]: With dead ends: 431 [2020-09-21 10:17:41,002 INFO L226 Difference]: Without dead ends: 320 [2020-09-21 10:17:41,003 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 [2020-09-21 10:17:41,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-09-21 10:17:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-09-21 10:17:41,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-21 10:17:41,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-09-21 10:17:41,020 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-09-21 10:17:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:41,020 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-09-21 10:17:41,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 10:17:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-09-21 10:17:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-21 10:17:41,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:41,022 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] [2020-09-21 10:17:41,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-21 10:17:41,022 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:41,023 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-09-21 10:17:41,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:41,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954387602] [2020-09-21 10:17:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-09-21 10:17:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 10:17:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:17:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:41,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954387602] [2020-09-21 10:17:41,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:41,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:17:41,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732348459] [2020-09-21 10:17:41,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:17:41,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:41,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:17:41,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:17:41,730 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-09-21 10:17:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:42,611 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-09-21 10:17:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 10:17:42,614 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-09-21 10:17:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:42,616 INFO L225 Difference]: With dead ends: 358 [2020-09-21 10:17:42,616 INFO L226 Difference]: Without dead ends: 250 [2020-09-21 10:17:42,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:17:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-21 10:17:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-09-21 10:17:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-21 10:17:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-09-21 10:17:42,631 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-09-21 10:17:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:42,632 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-09-21 10:17:42,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:17:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-09-21 10:17:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-09-21 10:17:42,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:42,634 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] [2020-09-21 10:17:42,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-21 10:17:42,634 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:42,634 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-09-21 10:17:42,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:42,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613499102] [2020-09-21 10:17:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:42,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-09-21 10:17:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-21 10:17:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:17:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:43,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613499102] [2020-09-21 10:17:43,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:43,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 10:17:43,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104884566] [2020-09-21 10:17:43,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 10:17:43,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:43,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 10:17:43,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:17:43,095 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-09-21 10:17:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:43,341 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-09-21 10:17:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 10:17:43,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-09-21 10:17:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:43,344 INFO L225 Difference]: With dead ends: 448 [2020-09-21 10:17:43,344 INFO L226 Difference]: Without dead ends: 334 [2020-09-21 10:17:43,345 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 [2020-09-21 10:17:43,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-09-21 10:17:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-09-21 10:17:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-09-21 10:17:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-09-21 10:17:43,363 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-09-21 10:17:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:43,363 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-09-21 10:17:43,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 10:17:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-09-21 10:17:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-21 10:17:43,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:43,365 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] [2020-09-21 10:17:43,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-21 10:17:43,365 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:43,365 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-09-21 10:17:43,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:43,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734226594] [2020-09-21 10:17:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:43,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-21 10:17:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:17:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 10:17:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:44,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734226594] [2020-09-21 10:17:44,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:44,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 10:17:44,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470292448] [2020-09-21 10:17:44,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 10:17:44,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:44,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 10:17:44,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:17:44,051 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-09-21 10:17:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:44,997 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-09-21 10:17:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:17:44,997 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-09-21 10:17:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:44,999 INFO L225 Difference]: With dead ends: 370 [2020-09-21 10:17:45,000 INFO L226 Difference]: Without dead ends: 259 [2020-09-21 10:17:45,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:17:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-21 10:17:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-09-21 10:17:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-21 10:17:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-09-21 10:17:45,016 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-09-21 10:17:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:45,016 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-09-21 10:17:45,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 10:17:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-09-21 10:17:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-21 10:17:45,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:45,018 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] [2020-09-21 10:17:45,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-21 10:17:45,018 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-09-21 10:17:45,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:45,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241289179] [2020-09-21 10:17:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-21 10:17:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-09-21 10:17:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-09-21 10:17:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:45,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241289179] [2020-09-21 10:17:45,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:45,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 10:17:45,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546816872] [2020-09-21 10:17:45,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 10:17:45,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 10:17:45,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-09-21 10:17:45,540 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-09-21 10:17:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:45,886 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-09-21 10:17:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 10:17:45,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-09-21 10:17:45,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:45,889 INFO L225 Difference]: With dead ends: 465 [2020-09-21 10:17:45,889 INFO L226 Difference]: Without dead ends: 348 [2020-09-21 10:17:45,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:17:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-09-21 10:17:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-09-21 10:17:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-09-21 10:17:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-09-21 10:17:45,907 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-09-21 10:17:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:45,907 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-09-21 10:17:45,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 10:17:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-09-21 10:17:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-21 10:17:45,908 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:45,909 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] [2020-09-21 10:17:45,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-21 10:17:45,909 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-09-21 10:17:45,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:45,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295592606] [2020-09-21 10:17:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:45,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-09-21 10:17:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-21 10:17:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:17:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:46,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295592606] [2020-09-21 10:17:46,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:46,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 10:17:46,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446888209] [2020-09-21 10:17:46,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 10:17:46,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 10:17:46,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:17:46,619 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-09-21 10:17:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:47,889 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-09-21 10:17:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 10:17:47,890 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-09-21 10:17:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:47,892 INFO L225 Difference]: With dead ends: 382 [2020-09-21 10:17:47,892 INFO L226 Difference]: Without dead ends: 268 [2020-09-21 10:17:47,893 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 [2020-09-21 10:17:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-09-21 10:17:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-09-21 10:17:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-21 10:17:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-09-21 10:17:47,910 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-09-21 10:17:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:47,910 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-09-21 10:17:47,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 10:17:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-09-21 10:17:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-21 10:17:47,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:47,912 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] [2020-09-21 10:17:47,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-21 10:17:47,912 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:47,913 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-09-21 10:17:47,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:47,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329057890] [2020-09-21 10:17:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:47,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-21 10:17:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-09-21 10:17:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-09-21 10:17:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:48,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329057890] [2020-09-21 10:17:48,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:48,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 10:17:48,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779157131] [2020-09-21 10:17:48,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 10:17:48,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 10:17:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:17:48,462 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-09-21 10:17:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:48,877 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-09-21 10:17:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 10:17:48,881 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-09-21 10:17:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:48,884 INFO L225 Difference]: With dead ends: 482 [2020-09-21 10:17:48,884 INFO L226 Difference]: Without dead ends: 362 [2020-09-21 10:17:48,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:17:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-09-21 10:17:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-09-21 10:17:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-21 10:17:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-09-21 10:17:48,904 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-09-21 10:17:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:48,904 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-09-21 10:17:48,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 10:17:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-09-21 10:17:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-21 10:17:48,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:48,906 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] [2020-09-21 10:17:48,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-21 10:17:48,906 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:48,906 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-09-21 10:17:48,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:48,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475902576] [2020-09-21 10:17:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:48,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-09-21 10:17:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:17:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-09-21 10:17:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:49,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475902576] [2020-09-21 10:17:49,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:49,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 10:17:49,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453838657] [2020-09-21 10:17:49,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 10:17:49,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:49,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 10:17:49,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:17:49,665 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-09-21 10:17:51,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:51,024 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-09-21 10:17:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 10:17:51,027 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-09-21 10:17:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:51,029 INFO L225 Difference]: With dead ends: 394 [2020-09-21 10:17:51,030 INFO L226 Difference]: Without dead ends: 277 [2020-09-21 10:17:51,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-21 10:17:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-09-21 10:17:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-09-21 10:17:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-09-21 10:17:51,049 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-09-21 10:17:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:51,049 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-09-21 10:17:51,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 10:17:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-09-21 10:17:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-21 10:17:51,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:51,051 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] [2020-09-21 10:17:51,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-21 10:17:51,051 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-09-21 10:17:51,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:51,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551105261] [2020-09-21 10:17:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-09-21 10:17:51,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:17:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-21 10:17:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:51,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551105261] [2020-09-21 10:17:51,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:51,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 10:17:51,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463489781] [2020-09-21 10:17:51,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 10:17:51,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:51,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 10:17:51,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:17:51,664 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-09-21 10:17:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:52,010 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-09-21 10:17:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 10:17:52,011 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-09-21 10:17:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:52,016 INFO L225 Difference]: With dead ends: 499 [2020-09-21 10:17:52,016 INFO L226 Difference]: Without dead ends: 376 [2020-09-21 10:17:52,017 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 [2020-09-21 10:17:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-09-21 10:17:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-09-21 10:17:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-09-21 10:17:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-09-21 10:17:52,036 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-09-21 10:17:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:52,037 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-09-21 10:17:52,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 10:17:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-09-21 10:17:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-21 10:17:52,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:52,038 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] [2020-09-21 10:17:52,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-21 10:17:52,038 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:52,039 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-09-21 10:17:52,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:52,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538365584] [2020-09-21 10:17:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-21 10:17:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-09-21 10:17:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 10:17:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:52,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538365584] [2020-09-21 10:17:52,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:52,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:17:52,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182350477] [2020-09-21 10:17:52,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:17:52,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:17:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:52,829 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-09-21 10:17:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:54,326 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-09-21 10:17:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 10:17:54,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-09-21 10:17:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:54,333 INFO L225 Difference]: With dead ends: 406 [2020-09-21 10:17:54,335 INFO L226 Difference]: Without dead ends: 286 [2020-09-21 10:17:54,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:17:54,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-21 10:17:54,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-09-21 10:17:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-21 10:17:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-09-21 10:17:54,363 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-09-21 10:17:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:54,363 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-09-21 10:17:54,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:17:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-09-21 10:17:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-21 10:17:54,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:54,365 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] [2020-09-21 10:17:54,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-21 10:17:54,365 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-09-21 10:17:54,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:54,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524152661] [2020-09-21 10:17:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-09-21 10:17:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-09-21 10:17:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-09-21 10:17:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:54,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524152661] [2020-09-21 10:17:54,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:54,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 10:17:54,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029780047] [2020-09-21 10:17:54,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 10:17:54,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 10:17:54,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-09-21 10:17:54,967 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-09-21 10:17:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:55,276 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-09-21 10:17:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 10:17:55,277 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-09-21 10:17:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:55,279 INFO L225 Difference]: With dead ends: 516 [2020-09-21 10:17:55,279 INFO L226 Difference]: Without dead ends: 390 [2020-09-21 10:17:55,280 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 [2020-09-21 10:17:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-09-21 10:17:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-09-21 10:17:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-09-21 10:17:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-09-21 10:17:55,299 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-09-21 10:17:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:55,300 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-09-21 10:17:55,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 10:17:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-09-21 10:17:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-21 10:17:55,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:55,301 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] [2020-09-21 10:17:55,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-21 10:17:55,302 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-09-21 10:17:55,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:55,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520277369] [2020-09-21 10:17:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:55,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-09-21 10:17:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:17:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-21 10:17:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:56,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520277369] [2020-09-21 10:17:56,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:56,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 10:17:56,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576815811] [2020-09-21 10:17:56,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 10:17:56,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:56,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 10:17:56,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:17:56,211 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-09-21 10:17:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:57,817 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-09-21 10:17:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:17:57,820 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-09-21 10:17:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:57,821 INFO L225 Difference]: With dead ends: 418 [2020-09-21 10:17:57,821 INFO L226 Difference]: Without dead ends: 295 [2020-09-21 10:17:57,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:17:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-09-21 10:17:57,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-09-21 10:17:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-09-21 10:17:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-09-21 10:17:57,840 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-09-21 10:17:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:57,841 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-09-21 10:17:57,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 10:17:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-09-21 10:17:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-21 10:17:57,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:57,842 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] [2020-09-21 10:17:57,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-21 10:17:57,843 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-09-21 10:17:57,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:57,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201562145] [2020-09-21 10:17:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:57,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-09-21 10:17:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:17:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-09-21 10:17:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-21 10:17:58,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201562145] [2020-09-21 10:17:58,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:58,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 10:17:58,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964753944] [2020-09-21 10:17:58,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 10:17:58,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:58,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 10:17:58,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-09-21 10:17:58,491 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-09-21 10:17:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:58,959 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-09-21 10:17:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 10:17:58,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-09-21 10:17:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:58,962 INFO L225 Difference]: With dead ends: 533 [2020-09-21 10:17:58,962 INFO L226 Difference]: Without dead ends: 404 [2020-09-21 10:17:58,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-09-21 10:17:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-09-21 10:17:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-09-21 10:17:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-09-21 10:17:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-09-21 10:17:58,983 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-09-21 10:17:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:58,983 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-09-21 10:17:58,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 10:17:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-09-21 10:17:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-21 10:17:58,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:58,985 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] [2020-09-21 10:17:58,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-21 10:17:58,985 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-09-21 10:17:58,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:58,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829276099] [2020-09-21 10:17:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:17:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:17:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-21 10:17:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-09-21 10:17:59,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829276099] [2020-09-21 10:17:59,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:17:59,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-21 10:17:59,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191921786] [2020-09-21 10:17:59,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:17:59,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:59,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:17:59,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:17:59,182 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-09-21 10:17:59,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:17:59,568 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-09-21 10:17:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:17:59,568 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-09-21 10:17:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:17:59,571 INFO L225 Difference]: With dead ends: 271 [2020-09-21 10:17:59,571 INFO L226 Difference]: Without dead ends: 261 [2020-09-21 10:17:59,571 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 [2020-09-21 10:17:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-09-21 10:17:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-09-21 10:17:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-09-21 10:17:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-09-21 10:17:59,590 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-09-21 10:17:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:17:59,590 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-09-21 10:17:59,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:17:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-09-21 10:17:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-21 10:17:59,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:17:59,592 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] [2020-09-21 10:17:59,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-21 10:17:59,592 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:17:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:17:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-09-21 10:17:59,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:17:59,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557818675] [2020-09-21 10:17:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:17:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:17:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:17:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:17:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:17:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:17:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-21 10:17:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:17:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-09-21 10:17:59,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557818675] [2020-09-21 10:17:59,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:17:59,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:17:59,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566653973] [2020-09-21 10:17:59,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:17:59,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:17:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:17:59,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:17:59,884 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-09-21 10:18:00,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:00,131 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-09-21 10:18:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:18:00,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-09-21 10:18:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:00,134 INFO L225 Difference]: With dead ends: 285 [2020-09-21 10:18:00,134 INFO L226 Difference]: Without dead ends: 280 [2020-09-21 10:18:00,135 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 [2020-09-21 10:18:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-21 10:18:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-09-21 10:18:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-21 10:18:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-09-21 10:18:00,162 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-09-21 10:18:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:00,163 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-09-21 10:18:00,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:18:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-09-21 10:18:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-21 10:18:00,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:00,165 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] [2020-09-21 10:18:00,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-21 10:18:00,165 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:00,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-09-21 10:18:00,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:00,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756176595] [2020-09-21 10:18:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:18:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-21 10:18:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-09-21 10:18:00,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756176595] [2020-09-21 10:18:00,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:18:00,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:18:00,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446120036] [2020-09-21 10:18:00,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:18:00,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:00,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:18:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:18:00,286 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-09-21 10:18:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:00,340 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-09-21 10:18:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:18:00,341 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-09-21 10:18:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:00,343 INFO L225 Difference]: With dead ends: 271 [2020-09-21 10:18:00,344 INFO L226 Difference]: Without dead ends: 265 [2020-09-21 10:18:00,344 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 [2020-09-21 10:18:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-21 10:18:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-09-21 10:18:00,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-21 10:18:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-09-21 10:18:00,373 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-09-21 10:18:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:00,373 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-09-21 10:18:00,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:18:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-09-21 10:18:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-21 10:18:00,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:00,375 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] [2020-09-21 10:18:00,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-21 10:18:00,376 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:00,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:00,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-09-21 10:18:00,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:00,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062748389] [2020-09-21 10:18:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:18:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-21 10:18:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-09-21 10:18:00,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062748389] [2020-09-21 10:18:00,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:00,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:18:00,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571360253] [2020-09-21 10:18:00,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:18:00,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:00,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:18:00,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:18:00,672 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-09-21 10:18:00,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:00,904 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-09-21 10:18:00,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:18:00,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-09-21 10:18:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:00,907 INFO L225 Difference]: With dead ends: 284 [2020-09-21 10:18:00,907 INFO L226 Difference]: Without dead ends: 274 [2020-09-21 10:18:00,907 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 [2020-09-21 10:18:00,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-21 10:18:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-09-21 10:18:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-09-21 10:18:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-09-21 10:18:00,940 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-09-21 10:18:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:00,940 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-09-21 10:18:00,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:18:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-09-21 10:18:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-21 10:18:00,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:00,942 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] [2020-09-21 10:18:00,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-21 10:18:00,943 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:00,943 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-09-21 10:18:00,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:00,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001478300] [2020-09-21 10:18:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:18:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-21 10:18:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-09-21 10:18:01,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001478300] [2020-09-21 10:18:01,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:18:01,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:18:01,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925031302] [2020-09-21 10:18:01,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:18:01,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:01,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:18:01,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:18:01,175 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-09-21 10:18:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:01,295 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-09-21 10:18:01,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:18:01,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-09-21 10:18:01,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:01,298 INFO L225 Difference]: With dead ends: 303 [2020-09-21 10:18:01,299 INFO L226 Difference]: Without dead ends: 280 [2020-09-21 10:18:01,299 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 [2020-09-21 10:18:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-21 10:18:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-09-21 10:18:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-09-21 10:18:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-09-21 10:18:01,328 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-09-21 10:18:01,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:01,328 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-09-21 10:18:01,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:18:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-09-21 10:18:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-09-21 10:18:01,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:01,331 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] [2020-09-21 10:18:01,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-21 10:18:01,331 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-09-21 10:18:01,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:01,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545194650] [2020-09-21 10:18:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:18:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-21 10:18:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 10:18:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-21 10:18:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-09-21 10:18:01,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545194650] [2020-09-21 10:18:01,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:01,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:18:01,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401389487] [2020-09-21 10:18:01,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:18:01,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:01,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:18:01,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:18:01,478 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-09-21 10:18:01,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:01,564 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-09-21 10:18:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:18:01,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-09-21 10:18:01,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:01,566 INFO L225 Difference]: With dead ends: 409 [2020-09-21 10:18:01,566 INFO L226 Difference]: Without dead ends: 155 [2020-09-21 10:18:01,567 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 [2020-09-21 10:18:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-21 10:18:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-09-21 10:18:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-21 10:18:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-09-21 10:18:01,584 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-09-21 10:18:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:01,584 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-09-21 10:18:01,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:18:01,585 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-09-21 10:18:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-21 10:18:01,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:01,586 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] [2020-09-21 10:18:01,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-21 10:18:01,586 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-09-21 10:18:01,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:01,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089023920] [2020-09-21 10:18:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:18:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-21 10:18:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-09-21 10:18:01,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089023920] [2020-09-21 10:18:01,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:18:01,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:18:01,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186191716] [2020-09-21 10:18:01,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:18:01,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:18:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:18:01,785 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-09-21 10:18:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:01,901 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-09-21 10:18:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:18:01,902 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-09-21 10:18:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:01,903 INFO L225 Difference]: With dead ends: 158 [2020-09-21 10:18:01,903 INFO L226 Difference]: Without dead ends: 143 [2020-09-21 10:18:01,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:18:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-21 10:18:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-09-21 10:18:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-21 10:18:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-09-21 10:18:01,923 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-09-21 10:18:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:01,923 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-09-21 10:18:01,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:18:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-09-21 10:18:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-21 10:18:01,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:01,924 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, 1, 1, 1] [2020-09-21 10:18:01,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-21 10:18:01,925 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-09-21 10:18:01,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:01,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550814312] [2020-09-21 10:18:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:18:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-21 10:18:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-09-21 10:18:02,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550814312] [2020-09-21 10:18:02,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:02,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:18:02,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233637065] [2020-09-21 10:18:02,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:18:02,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:02,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:18:02,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:18:02,124 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-09-21 10:18:02,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:02,239 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-09-21 10:18:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:18:02,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-09-21 10:18:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:02,241 INFO L225 Difference]: With dead ends: 176 [2020-09-21 10:18:02,241 INFO L226 Difference]: Without dead ends: 166 [2020-09-21 10:18:02,241 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 [2020-09-21 10:18:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-21 10:18:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-09-21 10:18:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-21 10:18:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-09-21 10:18:02,264 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-09-21 10:18:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:02,265 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-09-21 10:18:02,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:18:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-09-21 10:18:02,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-21 10:18:02,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:02,266 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, 1, 1, 1] [2020-09-21 10:18:02,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-21 10:18:02,266 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:02,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:02,267 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-09-21 10:18:02,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:02,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092219582] [2020-09-21 10:18:02,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-21 10:18:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-09-21 10:18:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-09-21 10:18:02,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092219582] [2020-09-21 10:18:02,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:02,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:18:02,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318532177] [2020-09-21 10:18:02,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:18:02,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:02,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:18:02,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:18:02,492 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-09-21 10:18:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:02,656 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-09-21 10:18:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:18:02,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-09-21 10:18:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:02,659 INFO L225 Difference]: With dead ends: 170 [2020-09-21 10:18:02,659 INFO L226 Difference]: Without dead ends: 150 [2020-09-21 10:18:02,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:18:02,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-21 10:18:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-09-21 10:18:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-21 10:18:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-09-21 10:18:02,679 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-09-21 10:18:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:02,682 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-09-21 10:18:02,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:18:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-09-21 10:18:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-21 10:18:02,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:02,688 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] [2020-09-21 10:18:02,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-21 10:18:02,688 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-09-21 10:18:02,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:02,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014382974] [2020-09-21 10:18:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 10:18:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:18:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-09-21 10:18:02,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014382974] [2020-09-21 10:18:02,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:02,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:18:02,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988144693] [2020-09-21 10:18:02,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:18:02,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:18:02,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:18:02,893 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-09-21 10:18:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:02,980 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-09-21 10:18:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:18:02,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-09-21 10:18:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:02,982 INFO L225 Difference]: With dead ends: 173 [2020-09-21 10:18:02,982 INFO L226 Difference]: Without dead ends: 163 [2020-09-21 10:18:02,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:18:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-21 10:18:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-09-21 10:18:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-21 10:18:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-09-21 10:18:03,002 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-09-21 10:18:03,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:03,002 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-09-21 10:18:03,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:18:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-09-21 10:18:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-21 10:18:03,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:18:03,004 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] [2020-09-21 10:18:03,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-09-21 10:18:03,004 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:18:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:18:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-09-21 10:18:03,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:18:03,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694796525] [2020-09-21 10:18:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:18:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:18:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:18:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:18:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-21 10:18:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-21 10:18:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:18:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:18:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-09-21 10:18:03,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694796525] [2020-09-21 10:18:03,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:18:03,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:18:03,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090749332] [2020-09-21 10:18:03,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:18:03,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:18:03,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:18:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:18:03,320 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-09-21 10:18:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:18:03,451 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-09-21 10:18:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:18:03,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-09-21 10:18:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:18:03,452 INFO L225 Difference]: With dead ends: 157 [2020-09-21 10:18:03,452 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:18:03,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:18:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:18:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:18:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:18:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:18:03,454 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-09-21 10:18:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:18:03,454 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:18:03,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:18:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:18:03,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:18:03,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-09-21 10:18:03,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.