/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:06:13,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:06:13,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:06:13,565 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:06:13,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:06:13,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:06:13,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:06:13,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:06:13,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:06:13,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:06:13,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:06:13,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:06:13,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:06:13,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:06:13,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:06:13,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:06:13,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:06:13,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:06:13,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:06:13,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:06:13,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:06:13,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:06:13,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:06:13,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:06:13,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:06:13,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:06:13,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:06:13,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:06:13,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:06:13,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:06:13,608 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:06:13,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:06:13,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:06:13,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:06:13,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:06:13,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:06:13,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:06:13,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:06:13,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:06:13,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:06:13,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:06:13,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:06:13,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:06:13,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:06:13,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:06:13,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:06:13,676 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:06:13,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:06:13,677 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:06:13,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:06:13,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:06:13,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:06:13,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:06:13,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:06:13,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:06:13,678 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:06:13,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:06:13,678 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:06:13,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:06:13,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:06:13,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:06:13,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:06:13,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:06:13,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:06:13,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:06:13,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:06:13,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:06:13,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:06:13,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:06:13,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:06:13,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:06:13,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:06:14,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:06:14,013 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:06:14,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:06:14,018 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:06:14,018 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:06:14,019 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-21 18:06:14,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a099ea53e/b5ff9e984c044ef7a905eb7840b085a8/FLAGf40ecd1b2 [2020-08-21 18:06:14,600 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:06:14,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-21 18:06:14,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a099ea53e/b5ff9e984c044ef7a905eb7840b085a8/FLAGf40ecd1b2 [2020-08-21 18:06:14,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a099ea53e/b5ff9e984c044ef7a905eb7840b085a8 [2020-08-21 18:06:14,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:06:14,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:06:14,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:06:14,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:06:14,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:06:14,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:06:14" (1/1) ... [2020-08-21 18:06:14,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a5289c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:14, skipping insertion in model container [2020-08-21 18:06:14,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:06:14" (1/1) ... [2020-08-21 18:06:14,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:06:14,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:06:15,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:06:15,252 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:06:15,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:06:15,405 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:06:15,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15 WrapperNode [2020-08-21 18:06:15,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:06:15,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:06:15,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:06:15,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:06:15,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... [2020-08-21 18:06:15,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:06:15,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:06:15,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:06:15,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:06:15,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:06:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:06:15,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:06:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:06:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-21 18:06:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-21 18:06:15,514 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-21 18:06:15,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:06:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:06:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-21 18:06:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 18:06:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:06:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-21 18:06:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-21 18:06:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-21 18:06:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:06:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:06:15,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:06:15,956 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:06:15,957 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 18:06:15,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:15 BoogieIcfgContainer [2020-08-21 18:06:15,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:06:15,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:06:15,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:06:15,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:06:15,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:06:14" (1/3) ... [2020-08-21 18:06:15,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd32bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:06:15, skipping insertion in model container [2020-08-21 18:06:15,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:06:15" (2/3) ... [2020-08-21 18:06:15,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd32bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:06:15, skipping insertion in model container [2020-08-21 18:06:15,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:06:15" (3/3) ... [2020-08-21 18:06:15,971 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-21 18:06:15,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:06:15,991 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:06:16,005 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:06:16,029 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:06:16,030 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:06:16,030 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:06:16,030 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:06:16,030 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:06:16,030 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:06:16,031 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:06:16,031 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:06:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-21 18:06:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 18:06:16,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:16,057 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:16,058 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:16,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-21 18:06:16,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:16,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423809982] [2020-08-21 18:06:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:06:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-21 18:06:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 18:06:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:16,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423809982] [2020-08-21 18:06:16,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:16,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 18:06:16,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349744300] [2020-08-21 18:06:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:06:16,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:16,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:06:16,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:06:16,441 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-21 18:06:16,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:16,597 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-21 18:06:16,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:06:16,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-21 18:06:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:16,612 INFO L225 Difference]: With dead ends: 136 [2020-08-21 18:06:16,613 INFO L226 Difference]: Without dead ends: 76 [2020-08-21 18:06:16,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-21 18:06:16,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-21 18:06:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-21 18:06:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-21 18:06:16,671 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-21 18:06:16,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:16,672 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-21 18:06:16,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:06:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-21 18:06:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 18:06:16,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:16,676 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:16,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:06:16,676 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:16,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:16,677 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-21 18:06:16,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:16,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679970398] [2020-08-21 18:06:16,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 18:06:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 18:06:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:06:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:16,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679970398] [2020-08-21 18:06:16,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:16,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-21 18:06:16,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809192841] [2020-08-21 18:06:16,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:06:16,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:16,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:06:16,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:06:16,840 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-21 18:06:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:16,959 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-21 18:06:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:06:16,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-21 18:06:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:16,963 INFO L225 Difference]: With dead ends: 129 [2020-08-21 18:06:16,963 INFO L226 Difference]: Without dead ends: 79 [2020-08-21 18:06:16,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-21 18:06:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-21 18:06:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 18:06:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-21 18:06:16,985 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-21 18:06:16,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:16,986 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-21 18:06:16,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:06:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-21 18:06:16,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 18:06:16,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:16,989 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:16,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:06:16,990 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-21 18:06:16,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:16,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239900978] [2020-08-21 18:06:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 18:06:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 18:06:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:06:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:17,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239900978] [2020-08-21 18:06:17,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:17,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:06:17,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655188195] [2020-08-21 18:06:17,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:06:17,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:17,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:06:17,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:17,159 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-21 18:06:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:17,275 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-21 18:06:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:06:17,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-21 18:06:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:17,278 INFO L225 Difference]: With dead ends: 145 [2020-08-21 18:06:17,279 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 18:06:17,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:06:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 18:06:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-21 18:06:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-21 18:06:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-21 18:06:17,296 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-21 18:06:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:17,296 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-21 18:06:17,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:06:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-21 18:06:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 18:06:17,299 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:17,299 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:17,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:06:17,300 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:17,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:17,300 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-21 18:06:17,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:17,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481394042] [2020-08-21 18:06:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 18:06:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-21 18:06:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:06:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:17,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481394042] [2020-08-21 18:06:17,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:17,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:06:17,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453034163] [2020-08-21 18:06:17,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:06:17,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:17,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:06:17,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:17,432 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-21 18:06:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:17,554 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-21 18:06:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:06:17,555 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-21 18:06:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:17,557 INFO L225 Difference]: With dead ends: 156 [2020-08-21 18:06:17,558 INFO L226 Difference]: Without dead ends: 93 [2020-08-21 18:06:17,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:06:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-21 18:06:17,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-21 18:06:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 18:06:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-21 18:06:17,590 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-21 18:06:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:17,594 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-21 18:06:17,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:06:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-21 18:06:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-21 18:06:17,599 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:17,600 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:17,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:06:17,600 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:17,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-21 18:06:17,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:17,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600426592] [2020-08-21 18:06:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 18:06:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 18:06:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:06:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:17,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600426592] [2020-08-21 18:06:17,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:17,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:06:17,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049758230] [2020-08-21 18:06:17,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:06:17,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:06:17,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:06:17,777 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-21 18:06:17,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:17,902 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-21 18:06:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:06:17,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-21 18:06:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:17,905 INFO L225 Difference]: With dead ends: 166 [2020-08-21 18:06:17,906 INFO L226 Difference]: Without dead ends: 106 [2020-08-21 18:06:17,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:06:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-21 18:06:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-21 18:06:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 18:06:17,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-21 18:06:17,923 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-21 18:06:17,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:17,924 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-21 18:06:17,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:06:17,924 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-21 18:06:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 18:06:17,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:17,926 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:17,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:06:17,927 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-21 18:06:17,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:17,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806744040] [2020-08-21 18:06:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:17,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-21 18:06:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 18:06:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 18:06:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:18,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806744040] [2020-08-21 18:06:18,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:18,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 18:06:18,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270281029] [2020-08-21 18:06:18,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:06:18,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:06:18,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:06:18,050 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-21 18:06:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:18,148 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-21 18:06:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:06:18,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-21 18:06:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:18,151 INFO L225 Difference]: With dead ends: 176 [2020-08-21 18:06:18,151 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 18:06:18,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:06:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 18:06:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-21 18:06:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 18:06:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-21 18:06:18,166 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-21 18:06:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:18,166 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-21 18:06:18,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:06:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-21 18:06:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 18:06:18,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:18,169 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:18,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:06:18,169 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:18,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:18,170 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-21 18:06:18,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:18,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648988778] [2020-08-21 18:06:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-21 18:06:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:06:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:06:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:18,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648988778] [2020-08-21 18:06:18,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:18,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:06:18,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357907647] [2020-08-21 18:06:18,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:06:18,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:06:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:06:18,321 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-21 18:06:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:18,463 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-21 18:06:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:06:18,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-21 18:06:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:18,465 INFO L225 Difference]: With dead ends: 178 [2020-08-21 18:06:18,465 INFO L226 Difference]: Without dead ends: 115 [2020-08-21 18:06:18,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-21 18:06:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-21 18:06:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-21 18:06:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-21 18:06:18,480 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-21 18:06:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:18,480 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-21 18:06:18,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:06:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-21 18:06:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 18:06:18,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:18,482 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:18,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:06:18,482 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:18,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:18,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-21 18:06:18,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:18,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225985608] [2020-08-21 18:06:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 18:06:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 18:06:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 18:06:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:18,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225985608] [2020-08-21 18:06:18,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:18,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 18:06:18,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226209918] [2020-08-21 18:06:18,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:06:18,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:18,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:06:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:06:18,594 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-21 18:06:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:18,682 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-21 18:06:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:06:18,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-21 18:06:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:18,684 INFO L225 Difference]: With dead ends: 193 [2020-08-21 18:06:18,684 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 18:06:18,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 18:06:18,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-21 18:06:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 18:06:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-21 18:06:18,697 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-21 18:06:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:18,698 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-21 18:06:18,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:06:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-21 18:06:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 18:06:18,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:18,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:18,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:06:18,700 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:18,700 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-21 18:06:18,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:18,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170457531] [2020-08-21 18:06:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 18:06:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:06:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 18:06:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:18,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170457531] [2020-08-21 18:06:18,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:18,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:06:18,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727477905] [2020-08-21 18:06:18,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:18,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:18,868 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-21 18:06:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:19,027 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-21 18:06:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:06:19,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-21 18:06:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:19,030 INFO L225 Difference]: With dead ends: 190 [2020-08-21 18:06:19,030 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 18:06:19,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 18:06:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-21 18:06:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 18:06:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-21 18:06:19,045 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-21 18:06:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:19,045 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-21 18:06:19,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-21 18:06:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 18:06:19,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:19,047 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:19,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:06:19,047 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:19,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-21 18:06:19,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:19,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225509742] [2020-08-21 18:06:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-21 18:06:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 18:06:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 18:06:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:19,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225509742] [2020-08-21 18:06:19,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:19,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:06:19,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162664144] [2020-08-21 18:06:19,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:19,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:19,170 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-21 18:06:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:19,273 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-21 18:06:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:06:19,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-21 18:06:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:19,276 INFO L225 Difference]: With dead ends: 210 [2020-08-21 18:06:19,276 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 18:06:19,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 18:06:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-21 18:06:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 18:06:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-21 18:06:19,287 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-21 18:06:19,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:19,287 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-21 18:06:19,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-21 18:06:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 18:06:19,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:19,289 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:19,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:06:19,289 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:19,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-21 18:06:19,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:19,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803292324] [2020-08-21 18:06:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 18:06:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 18:06:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 18:06:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:19,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803292324] [2020-08-21 18:06:19,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:19,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:06:19,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318630064] [2020-08-21 18:06:19,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:19,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:19,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:19,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:19,463 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-21 18:06:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:19,616 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-21 18:06:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:06:19,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-21 18:06:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:19,618 INFO L225 Difference]: With dead ends: 202 [2020-08-21 18:06:19,618 INFO L226 Difference]: Without dead ends: 133 [2020-08-21 18:06:19,619 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 [2020-08-21 18:06:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-21 18:06:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-21 18:06:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-21 18:06:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-21 18:06:19,630 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-21 18:06:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:19,630 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-21 18:06:19,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-21 18:06:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-21 18:06:19,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:19,632 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:19,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:06:19,632 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-21 18:06:19,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:19,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366555454] [2020-08-21 18:06:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 18:06:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-21 18:06:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 18:06:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:19,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366555454] [2020-08-21 18:06:19,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:19,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:06:19,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412122861] [2020-08-21 18:06:19,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:19,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:19,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:19,747 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-21 18:06:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:19,846 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-21 18:06:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:06:19,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-21 18:06:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:19,848 INFO L225 Difference]: With dead ends: 227 [2020-08-21 18:06:19,848 INFO L226 Difference]: Without dead ends: 152 [2020-08-21 18:06:19,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:06:19,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-21 18:06:19,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-21 18:06:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 18:06:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-21 18:06:19,860 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-21 18:06:19,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:19,860 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-21 18:06:19,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-21 18:06:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 18:06:19,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:19,862 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:19,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:06:19,862 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:19,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:19,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-21 18:06:19,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:19,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165373097] [2020-08-21 18:06:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:19,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 18:06:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 18:06:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 18:06:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:20,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165373097] [2020-08-21 18:06:20,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:20,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:06:20,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679679896] [2020-08-21 18:06:20,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:06:20,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:06:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:06:20,069 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-21 18:06:20,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:20,282 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-21 18:06:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:06:20,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-21 18:06:20,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:20,284 INFO L225 Difference]: With dead ends: 214 [2020-08-21 18:06:20,285 INFO L226 Difference]: Without dead ends: 142 [2020-08-21 18:06:20,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:06:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-21 18:06:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-21 18:06:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-21 18:06:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-21 18:06:20,296 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-21 18:06:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:20,296 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-21 18:06:20,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:06:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-21 18:06:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 18:06:20,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:20,298 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:20,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:06:20,299 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-21 18:06:20,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:20,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164013221] [2020-08-21 18:06:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-21 18:06:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 18:06:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 18:06:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:20,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164013221] [2020-08-21 18:06:20,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:20,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:06:20,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207732618] [2020-08-21 18:06:20,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:06:20,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:20,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:06:20,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:06:20,457 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-21 18:06:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:20,584 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-21 18:06:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:06:20,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-21 18:06:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:20,587 INFO L225 Difference]: With dead ends: 244 [2020-08-21 18:06:20,587 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 18:06:20,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:06:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 18:06:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-21 18:06:20,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 18:06:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-21 18:06:20,600 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-21 18:06:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:20,601 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-21 18:06:20,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:06:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-21 18:06:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 18:06:20,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:20,603 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:20,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:06:20,603 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:20,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:20,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-21 18:06:20,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:20,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744804428] [2020-08-21 18:06:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-21 18:06:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 18:06:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 18:06:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:20,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744804428] [2020-08-21 18:06:20,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:20,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:06:20,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045013512] [2020-08-21 18:06:20,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:06:20,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:20,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:06:20,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:06:20,807 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-21 18:06:21,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:21,049 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-21 18:06:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:06:21,050 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-21 18:06:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:21,052 INFO L225 Difference]: With dead ends: 226 [2020-08-21 18:06:21,052 INFO L226 Difference]: Without dead ends: 151 [2020-08-21 18:06:21,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:06:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-21 18:06:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-21 18:06:21,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 18:06:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-21 18:06:21,064 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-21 18:06:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:21,065 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-21 18:06:21,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:06:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-21 18:06:21,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-21 18:06:21,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:21,066 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:21,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:06:21,067 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-21 18:06:21,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:21,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563553532] [2020-08-21 18:06:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 18:06:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-21 18:06:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 18:06:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:21,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563553532] [2020-08-21 18:06:21,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:21,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 18:06:21,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840485182] [2020-08-21 18:06:21,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 18:06:21,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 18:06:21,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:06:21,218 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-21 18:06:21,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:21,346 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-21 18:06:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 18:06:21,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-21 18:06:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:21,348 INFO L225 Difference]: With dead ends: 261 [2020-08-21 18:06:21,348 INFO L226 Difference]: Without dead ends: 180 [2020-08-21 18:06:21,349 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 [2020-08-21 18:06:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-21 18:06:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-21 18:06:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-21 18:06:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-21 18:06:21,361 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-21 18:06:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:21,361 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-21 18:06:21,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 18:06:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-21 18:06:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-21 18:06:21,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:21,363 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:21,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:06:21,363 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:21,364 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-21 18:06:21,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:21,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049315551] [2020-08-21 18:06:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 18:06:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 18:06:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 18:06:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:21,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049315551] [2020-08-21 18:06:21,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:21,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:06:21,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960939505] [2020-08-21 18:06:21,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:06:21,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:21,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:06:21,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:06:21,588 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-21 18:06:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:21,844 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-21 18:06:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 18:06:21,845 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-21 18:06:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:21,846 INFO L225 Difference]: With dead ends: 238 [2020-08-21 18:06:21,846 INFO L226 Difference]: Without dead ends: 160 [2020-08-21 18:06:21,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:06:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-21 18:06:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-21 18:06:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 18:06:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-21 18:06:21,858 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-21 18:06:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:21,858 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-21 18:06:21,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:06:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-21 18:06:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 18:06:21,859 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:21,860 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:21,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:06:21,860 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:21,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-21 18:06:21,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:21,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750845667] [2020-08-21 18:06:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:21,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-21 18:06:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 18:06:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 18:06:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:22,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750845667] [2020-08-21 18:06:22,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:22,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:06:22,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861968408] [2020-08-21 18:06:22,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:06:22,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:22,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:06:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:06:22,031 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-21 18:06:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:22,191 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-21 18:06:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 18:06:22,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-21 18:06:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:22,193 INFO L225 Difference]: With dead ends: 278 [2020-08-21 18:06:22,193 INFO L226 Difference]: Without dead ends: 194 [2020-08-21 18:06:22,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:06:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-21 18:06:22,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-21 18:06:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-21 18:06:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-21 18:06:22,206 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-21 18:06:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:22,207 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-21 18:06:22,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:06:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-21 18:06:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 18:06:22,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:22,209 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:22,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:06:22,209 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:22,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-21 18:06:22,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:22,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671920728] [2020-08-21 18:06:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-21 18:06:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 18:06:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 18:06:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:22,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671920728] [2020-08-21 18:06:22,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:22,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:06:22,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432277853] [2020-08-21 18:06:22,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:06:22,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:06:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:06:22,539 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-21 18:06:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:22,818 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-21 18:06:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:06:22,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-21 18:06:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:22,821 INFO L225 Difference]: With dead ends: 250 [2020-08-21 18:06:22,821 INFO L226 Difference]: Without dead ends: 169 [2020-08-21 18:06:22,822 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 [2020-08-21 18:06:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-21 18:06:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-21 18:06:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-21 18:06:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-21 18:06:22,835 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-21 18:06:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:22,836 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-21 18:06:22,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:06:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-21 18:06:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 18:06:22,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:22,837 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:22,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 18:06:22,838 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-21 18:06:22,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:22,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114400109] [2020-08-21 18:06:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:22,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 18:06:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-21 18:06:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 18:06:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:23,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114400109] [2020-08-21 18:06:23,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:23,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:06:23,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499659796] [2020-08-21 18:06:23,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:06:23,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:23,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:06:23,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:06:23,048 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-21 18:06:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:23,213 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-21 18:06:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 18:06:23,214 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-21 18:06:23,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:23,215 INFO L225 Difference]: With dead ends: 295 [2020-08-21 18:06:23,216 INFO L226 Difference]: Without dead ends: 208 [2020-08-21 18:06:23,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:06:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-21 18:06:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-21 18:06:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 18:06:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-21 18:06:23,235 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-21 18:06:23,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:23,235 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-21 18:06:23,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:06:23,235 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-21 18:06:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-21 18:06:23,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:23,237 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:23,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 18:06:23,238 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:23,238 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-21 18:06:23,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:23,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173604550] [2020-08-21 18:06:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 18:06:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 18:06:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:06:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:23,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173604550] [2020-08-21 18:06:23,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:23,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:06:23,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272451354] [2020-08-21 18:06:23,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:06:23,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:06:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:06:23,552 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-21 18:06:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:23,924 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-21 18:06:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:06:23,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-21 18:06:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:23,926 INFO L225 Difference]: With dead ends: 262 [2020-08-21 18:06:23,927 INFO L226 Difference]: Without dead ends: 178 [2020-08-21 18:06:23,927 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 [2020-08-21 18:06:23,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-21 18:06:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-21 18:06:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-21 18:06:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-21 18:06:23,939 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-21 18:06:23,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:23,940 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-21 18:06:23,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:06:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-21 18:06:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 18:06:23,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:23,941 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:23,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 18:06:23,942 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:23,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-21 18:06:23,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:23,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906419652] [2020-08-21 18:06:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:23,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-21 18:06:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 18:06:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 18:06:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:24,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906419652] [2020-08-21 18:06:24,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:24,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 18:06:24,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089140678] [2020-08-21 18:06:24,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:06:24,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:24,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:06:24,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:06:24,149 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-21 18:06:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:24,325 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-21 18:06:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:06:24,326 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-21 18:06:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:24,328 INFO L225 Difference]: With dead ends: 312 [2020-08-21 18:06:24,328 INFO L226 Difference]: Without dead ends: 222 [2020-08-21 18:06:24,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:06:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-21 18:06:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-21 18:06:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 18:06:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-21 18:06:24,341 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-21 18:06:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:24,341 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-21 18:06:24,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:06:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-21 18:06:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 18:06:24,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:24,343 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:24,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 18:06:24,343 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:24,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-21 18:06:24,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:24,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408812125] [2020-08-21 18:06:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-21 18:06:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 18:06:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 18:06:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:24,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408812125] [2020-08-21 18:06:24,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:24,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:06:24,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483930903] [2020-08-21 18:06:24,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:06:24,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:24,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:06:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:06:24,672 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-21 18:06:25,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:25,164 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-21 18:06:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:06:25,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-21 18:06:25,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:25,166 INFO L225 Difference]: With dead ends: 274 [2020-08-21 18:06:25,167 INFO L226 Difference]: Without dead ends: 187 [2020-08-21 18:06:25,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:06:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-21 18:06:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-21 18:06:25,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-21 18:06:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-21 18:06:25,182 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-21 18:06:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:25,182 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-21 18:06:25,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:06:25,182 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-21 18:06:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-21 18:06:25,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:25,184 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:25,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 18:06:25,184 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-21 18:06:25,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:25,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058679171] [2020-08-21 18:06:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 18:06:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-21 18:06:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 18:06:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:25,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058679171] [2020-08-21 18:06:25,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:25,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:06:25,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59289944] [2020-08-21 18:06:25,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:06:25,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:25,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:06:25,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:06:25,452 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-21 18:06:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:25,624 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-21 18:06:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:06:25,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-21 18:06:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:25,627 INFO L225 Difference]: With dead ends: 329 [2020-08-21 18:06:25,627 INFO L226 Difference]: Without dead ends: 236 [2020-08-21 18:06:25,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:06:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-21 18:06:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-21 18:06:25,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-21 18:06:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-21 18:06:25,644 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-21 18:06:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:25,644 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-21 18:06:25,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:06:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-21 18:06:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-21 18:06:25,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:25,646 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:25,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 18:06:25,649 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-21 18:06:25,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:25,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330158831] [2020-08-21 18:06:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 18:06:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 18:06:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 18:06:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:25,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330158831] [2020-08-21 18:06:25,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:25,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 18:06:25,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469845567] [2020-08-21 18:06:25,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 18:06:25,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:25,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 18:06:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:06:26,000 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-21 18:06:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:26,450 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-21 18:06:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:06:26,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-21 18:06:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:26,452 INFO L225 Difference]: With dead ends: 286 [2020-08-21 18:06:26,453 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 18:06:26,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:06:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 18:06:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-21 18:06:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-21 18:06:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-21 18:06:26,470 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-21 18:06:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:26,470 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-21 18:06:26,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 18:06:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-21 18:06:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 18:06:26,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:26,472 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:26,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 18:06:26,473 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-21 18:06:26,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:26,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030889693] [2020-08-21 18:06:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:26,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:26,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:26,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:26,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-21 18:06:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:26,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 18:06:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:26,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 18:06:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:26,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030889693] [2020-08-21 18:06:26,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:26,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 18:06:26,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440122049] [2020-08-21 18:06:26,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 18:06:26,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 18:06:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:06:26,777 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-21 18:06:26,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:26,998 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-21 18:06:26,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:06:26,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-21 18:06:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:27,001 INFO L225 Difference]: With dead ends: 346 [2020-08-21 18:06:27,001 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 18:06:27,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:06:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 18:06:27,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-21 18:06:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 18:06:27,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-21 18:06:27,014 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-21 18:06:27,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:27,014 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-21 18:06:27,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 18:06:27,015 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-21 18:06:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 18:06:27,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:27,016 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:27,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 18:06:27,016 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-21 18:06:27,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:27,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898912988] [2020-08-21 18:06:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 18:06:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 18:06:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 18:06:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-21 18:06:27,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898912988] [2020-08-21 18:06:27,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:27,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:06:27,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159391815] [2020-08-21 18:06:27,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:06:27,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:27,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:06:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:06:27,078 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-21 18:06:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:27,091 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-21 18:06:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:06:27,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-21 18:06:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:27,092 INFO L225 Difference]: With dead ends: 160 [2020-08-21 18:06:27,092 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 18:06:27,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:06:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 18:06:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-21 18:06:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 18:06:27,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-21 18:06:27,103 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-21 18:06:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:27,104 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-21 18:06:27,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:06:27,104 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-21 18:06:27,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 18:06:27,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:27,105 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:27,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 18:06:27,106 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-21 18:06:27,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:27,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037356786] [2020-08-21 18:06:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 18:06:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 18:06:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 18:06:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-21 18:06:27,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037356786] [2020-08-21 18:06:27,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:27,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:06:27,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015362625] [2020-08-21 18:06:27,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:06:27,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:06:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:06:27,166 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-21 18:06:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:27,190 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-21 18:06:27,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:06:27,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-21 18:06:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:27,192 INFO L225 Difference]: With dead ends: 161 [2020-08-21 18:06:27,192 INFO L226 Difference]: Without dead ends: 149 [2020-08-21 18:06:27,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-21 18:06:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-21 18:06:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-21 18:06:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-21 18:06:27,204 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-21 18:06:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:27,204 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-21 18:06:27,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:06:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-21 18:06:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 18:06:27,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:27,206 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:27,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 18:06:27,206 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-21 18:06:27,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:27,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525415458] [2020-08-21 18:06:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-21 18:06:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 18:06:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 18:06:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:27,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525415458] [2020-08-21 18:06:27,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:27,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 18:06:27,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882246559] [2020-08-21 18:06:27,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 18:06:27,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 18:06:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:06:27,582 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-21 18:06:28,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:28,162 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-21 18:06:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:06:28,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-21 18:06:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:28,164 INFO L225 Difference]: With dead ends: 298 [2020-08-21 18:06:28,165 INFO L226 Difference]: Without dead ends: 205 [2020-08-21 18:06:28,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:06:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-21 18:06:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-21 18:06:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-21 18:06:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-21 18:06:28,177 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-21 18:06:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:28,178 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-21 18:06:28,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 18:06:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-21 18:06:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 18:06:28,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:28,179 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:28,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 18:06:28,180 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:28,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-21 18:06:28,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:28,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728398955] [2020-08-21 18:06:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 18:06:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-21 18:06:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 18:06:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:28,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728398955] [2020-08-21 18:06:28,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:28,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 18:06:28,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233405659] [2020-08-21 18:06:28,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 18:06:28,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:28,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 18:06:28,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:06:28,460 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-21 18:06:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:28,725 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-21 18:06:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:06:28,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-21 18:06:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:28,728 INFO L225 Difference]: With dead ends: 363 [2020-08-21 18:06:28,728 INFO L226 Difference]: Without dead ends: 264 [2020-08-21 18:06:28,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:06:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-21 18:06:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-21 18:06:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 18:06:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-21 18:06:28,748 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-21 18:06:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:28,748 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-21 18:06:28,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 18:06:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-21 18:06:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-21 18:06:28,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:28,750 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:28,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 18:06:28,751 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-21 18:06:28,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:28,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962643311] [2020-08-21 18:06:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:28,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:29,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 18:06:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:29,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 18:06:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:29,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 18:06:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:29,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962643311] [2020-08-21 18:06:29,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:29,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 18:06:29,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796041782] [2020-08-21 18:06:29,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 18:06:29,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 18:06:29,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:06:29,174 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-21 18:06:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:29,746 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-21 18:06:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 18:06:29,746 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-21 18:06:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:29,748 INFO L225 Difference]: With dead ends: 310 [2020-08-21 18:06:29,748 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 18:06:29,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:06:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 18:06:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-21 18:06:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-21 18:06:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-21 18:06:29,765 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-21 18:06:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:29,765 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-21 18:06:29,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 18:06:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-21 18:06:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-21 18:06:29,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:29,767 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:29,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 18:06:29,768 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-21 18:06:29,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:29,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796141944] [2020-08-21 18:06:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:29,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:29,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:29,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 18:06:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 18:06:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 18:06:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:30,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796141944] [2020-08-21 18:06:30,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:30,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 18:06:30,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874478792] [2020-08-21 18:06:30,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 18:06:30,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 18:06:30,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-21 18:06:30,148 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-21 18:06:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:30,383 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-21 18:06:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 18:06:30,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-21 18:06:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:30,385 INFO L225 Difference]: With dead ends: 380 [2020-08-21 18:06:30,386 INFO L226 Difference]: Without dead ends: 278 [2020-08-21 18:06:30,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:06:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-21 18:06:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-21 18:06:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-21 18:06:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-21 18:06:30,406 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-21 18:06:30,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:30,407 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-21 18:06:30,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 18:06:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-21 18:06:30,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-21 18:06:30,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:30,409 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:30,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 18:06:30,409 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-21 18:06:30,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:30,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607558628] [2020-08-21 18:06:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:06:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 18:06:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 18:06:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:30,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607558628] [2020-08-21 18:06:30,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:30,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:06:30,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338061817] [2020-08-21 18:06:30,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:06:30,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:06:30,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:06:30,868 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-21 18:06:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:31,563 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-21 18:06:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:06:31,563 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-21 18:06:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:31,565 INFO L225 Difference]: With dead ends: 322 [2020-08-21 18:06:31,565 INFO L226 Difference]: Without dead ends: 223 [2020-08-21 18:06:31,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:06:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-21 18:06:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-21 18:06:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-21 18:06:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-21 18:06:31,585 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-21 18:06:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:31,586 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-21 18:06:31,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:06:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-21 18:06:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-21 18:06:31,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:31,589 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:31,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 18:06:31,589 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-21 18:06:31,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:31,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005341246] [2020-08-21 18:06:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:31,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:31,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:31,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:32,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 18:06:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:32,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-21 18:06:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:32,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 18:06:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:32,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005341246] [2020-08-21 18:06:32,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:32,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:06:32,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396716353] [2020-08-21 18:06:32,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:06:32,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:32,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:06:32,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:06:32,050 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-21 18:06:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:32,406 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-21 18:06:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 18:06:32,411 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-21 18:06:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:32,414 INFO L225 Difference]: With dead ends: 397 [2020-08-21 18:06:32,414 INFO L226 Difference]: Without dead ends: 292 [2020-08-21 18:06:32,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:06:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-21 18:06:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-21 18:06:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-21 18:06:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-21 18:06:32,439 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-21 18:06:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:32,440 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-21 18:06:32,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:06:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-21 18:06:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-21 18:06:32,442 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:32,443 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:32,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-21 18:06:32,443 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:32,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-21 18:06:32,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:32,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980352377] [2020-08-21 18:06:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:32,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:32,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:32,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:33,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 18:06:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:33,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 18:06:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:33,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 18:06:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:33,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980352377] [2020-08-21 18:06:33,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:33,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 18:06:33,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850684230] [2020-08-21 18:06:33,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 18:06:33,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:33,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 18:06:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:06:33,152 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-21 18:06:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:33,891 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-21 18:06:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 18:06:33,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-21 18:06:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:33,894 INFO L225 Difference]: With dead ends: 334 [2020-08-21 18:06:33,894 INFO L226 Difference]: Without dead ends: 232 [2020-08-21 18:06:33,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:06:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-21 18:06:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-21 18:06:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 18:06:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-21 18:06:33,909 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-21 18:06:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:33,911 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-21 18:06:33,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 18:06:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-21 18:06:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-21 18:06:33,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:33,913 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:33,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-21 18:06:33,914 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:33,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-21 18:06:33,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:33,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771491226] [2020-08-21 18:06:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:33,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:33,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:33,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-21 18:06:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:34,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 18:06:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:34,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 18:06:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:34,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771491226] [2020-08-21 18:06:34,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:34,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 18:06:34,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337344157] [2020-08-21 18:06:34,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 18:06:34,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:34,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 18:06:34,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-21 18:06:34,319 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-21 18:06:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:34,675 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-21 18:06:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 18:06:34,675 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-21 18:06:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:34,678 INFO L225 Difference]: With dead ends: 414 [2020-08-21 18:06:34,678 INFO L226 Difference]: Without dead ends: 306 [2020-08-21 18:06:34,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:06:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-21 18:06:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-21 18:06:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-21 18:06:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-21 18:06:34,697 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-21 18:06:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:34,698 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-21 18:06:34,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 18:06:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-21 18:06:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-21 18:06:34,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:34,699 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:34,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-21 18:06:34,700 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-21 18:06:34,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:34,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733260081] [2020-08-21 18:06:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:34,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:34,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:35,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-21 18:06:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:35,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 18:06:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:35,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 18:06:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:35,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733260081] [2020-08-21 18:06:35,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:35,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 18:06:35,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774499945] [2020-08-21 18:06:35,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 18:06:35,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 18:06:35,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:06:35,228 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-21 18:06:35,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:35,999 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-21 18:06:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:06:36,000 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-21 18:06:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:36,003 INFO L225 Difference]: With dead ends: 346 [2020-08-21 18:06:36,004 INFO L226 Difference]: Without dead ends: 241 [2020-08-21 18:06:36,005 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 [2020-08-21 18:06:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-21 18:06:36,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-21 18:06:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-21 18:06:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-21 18:06:36,021 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-21 18:06:36,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:36,022 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-21 18:06:36,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 18:06:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-21 18:06:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-21 18:06:36,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:36,027 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:36,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-21 18:06:36,027 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:36,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-21 18:06:36,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:36,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021496945] [2020-08-21 18:06:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 18:06:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-21 18:06:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 18:06:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:36,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021496945] [2020-08-21 18:06:36,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:36,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 18:06:36,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022139915] [2020-08-21 18:06:36,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 18:06:36,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:36,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 18:06:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:06:36,486 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-21 18:06:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:36,807 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-21 18:06:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 18:06:36,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-21 18:06:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:36,811 INFO L225 Difference]: With dead ends: 431 [2020-08-21 18:06:36,811 INFO L226 Difference]: Without dead ends: 320 [2020-08-21 18:06:36,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:06:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-21 18:06:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-21 18:06:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-21 18:06:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-21 18:06:36,829 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-21 18:06:36,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:36,830 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-21 18:06:36,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 18:06:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-21 18:06:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-21 18:06:36,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:36,832 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:36,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-21 18:06:36,832 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-21 18:06:36,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:36,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021450377] [2020-08-21 18:06:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:36,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:37,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 18:06:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:37,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 18:06:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:37,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 18:06:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:37,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021450377] [2020-08-21 18:06:37,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:37,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:06:37,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991648327] [2020-08-21 18:06:37,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:06:37,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:37,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:06:37,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:06:37,359 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-21 18:06:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:38,175 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-21 18:06:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 18:06:38,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-21 18:06:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:38,177 INFO L225 Difference]: With dead ends: 358 [2020-08-21 18:06:38,178 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 18:06:38,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-21 18:06:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 18:06:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-21 18:06:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-21 18:06:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-21 18:06:38,198 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-21 18:06:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:38,198 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-21 18:06:38,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:06:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-21 18:06:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-21 18:06:38,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:38,201 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:38,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-21 18:06:38,201 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-21 18:06:38,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:38,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546670960] [2020-08-21 18:06:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:38,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:38,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:38,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:38,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-21 18:06:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:38,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-21 18:06:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:38,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:38,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546670960] [2020-08-21 18:06:38,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:38,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:06:38,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644653389] [2020-08-21 18:06:38,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:06:38,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:06:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:06:38,658 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-21 18:06:38,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:38,941 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-21 18:06:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 18:06:38,945 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-21 18:06:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:38,947 INFO L225 Difference]: With dead ends: 448 [2020-08-21 18:06:38,948 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 18:06:38,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-21 18:06:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 18:06:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-21 18:06:38,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 18:06:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-21 18:06:38,971 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-21 18:06:38,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:38,971 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-21 18:06:38,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:06:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-21 18:06:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-21 18:06:38,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:38,974 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:38,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-21 18:06:38,974 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:38,975 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-21 18:06:38,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:38,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877690386] [2020-08-21 18:06:38,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:39,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:39,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:39,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:39,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-21 18:06:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:39,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 18:06:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:39,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 18:06:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:39,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877690386] [2020-08-21 18:06:39,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:39,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 18:06:39,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690433689] [2020-08-21 18:06:39,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 18:06:39,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 18:06:39,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-21 18:06:39,584 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-21 18:06:40,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:40,473 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-21 18:06:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:06:40,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-21 18:06:40,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:40,482 INFO L225 Difference]: With dead ends: 370 [2020-08-21 18:06:40,482 INFO L226 Difference]: Without dead ends: 259 [2020-08-21 18:06:40,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:06:40,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-21 18:06:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-21 18:06:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-21 18:06:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-21 18:06:40,506 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-21 18:06:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:40,507 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-21 18:06:40,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 18:06:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-21 18:06:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 18:06:40,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:40,508 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:40,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-21 18:06:40,509 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-21 18:06:40,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:40,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498889009] [2020-08-21 18:06:40,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:40,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:40,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:40,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:40,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:40,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 18:06:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:40,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-21 18:06:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:40,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-21 18:06:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:40,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498889009] [2020-08-21 18:06:40,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:40,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 18:06:40,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300721225] [2020-08-21 18:06:40,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 18:06:40,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:40,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 18:06:40,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-21 18:06:40,965 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-21 18:06:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:41,309 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-21 18:06:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:06:41,311 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-21 18:06:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:41,313 INFO L225 Difference]: With dead ends: 465 [2020-08-21 18:06:41,313 INFO L226 Difference]: Without dead ends: 348 [2020-08-21 18:06:41,314 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 [2020-08-21 18:06:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-21 18:06:41,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-21 18:06:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-21 18:06:41,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-21 18:06:41,331 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-21 18:06:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:41,331 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-21 18:06:41,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 18:06:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-21 18:06:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-21 18:06:41,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:41,332 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:41,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-21 18:06:41,333 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-21 18:06:41,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:41,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292900069] [2020-08-21 18:06:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:41,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:41,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:41,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:41,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 18:06:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:41,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 18:06:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:41,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 18:06:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:41,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292900069] [2020-08-21 18:06:41,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:41,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 18:06:41,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050354095] [2020-08-21 18:06:41,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 18:06:41,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 18:06:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:06:41,999 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-21 18:06:43,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:43,166 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-21 18:06:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 18:06:43,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-21 18:06:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:43,170 INFO L225 Difference]: With dead ends: 382 [2020-08-21 18:06:43,170 INFO L226 Difference]: Without dead ends: 268 [2020-08-21 18:06:43,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:06:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-21 18:06:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-21 18:06:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-21 18:06:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-21 18:06:43,202 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-21 18:06:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:43,204 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-21 18:06:43,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 18:06:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-21 18:06:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-21 18:06:43,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:43,207 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:43,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-21 18:06:43,208 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:43,208 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-21 18:06:43,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:43,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276810993] [2020-08-21 18:06:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:43,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:43,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:43,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:43,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-21 18:06:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:43,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-21 18:06:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:43,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-21 18:06:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:43,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276810993] [2020-08-21 18:06:43,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:43,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 18:06:43,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765114795] [2020-08-21 18:06:43,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 18:06:43,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 18:06:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-21 18:06:43,775 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-21 18:06:44,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:44,191 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-21 18:06:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 18:06:44,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-21 18:06:44,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:44,194 INFO L225 Difference]: With dead ends: 482 [2020-08-21 18:06:44,194 INFO L226 Difference]: Without dead ends: 362 [2020-08-21 18:06:44,196 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 [2020-08-21 18:06:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-21 18:06:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-21 18:06:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-21 18:06:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-21 18:06:44,219 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-21 18:06:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:44,220 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-21 18:06:44,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 18:06:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-21 18:06:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-21 18:06:44,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:44,222 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:44,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-21 18:06:44,222 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:44,222 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-21 18:06:44,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:44,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562650461] [2020-08-21 18:06:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:44,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:44,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:44,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:44,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-21 18:06:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:44,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 18:06:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:44,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-21 18:06:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:44,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562650461] [2020-08-21 18:06:44,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:44,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 18:06:44,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568399393] [2020-08-21 18:06:44,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 18:06:44,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 18:06:44,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:06:44,956 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-21 18:06:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:46,270 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-21 18:06:46,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 18:06:46,279 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-21 18:06:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:46,281 INFO L225 Difference]: With dead ends: 394 [2020-08-21 18:06:46,281 INFO L226 Difference]: Without dead ends: 277 [2020-08-21 18:06:46,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:06:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-21 18:06:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-21 18:06:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-21 18:06:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-21 18:06:46,305 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-21 18:06:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:46,308 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-21 18:06:46,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 18:06:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-21 18:06:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-21 18:06:46,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:46,309 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:46,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-21 18:06:46,310 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-21 18:06:46,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:46,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59164659] [2020-08-21 18:06:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:46,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:46,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:46,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:46,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-21 18:06:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:46,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 18:06:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:46,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-21 18:06:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:46,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59164659] [2020-08-21 18:06:46,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:46,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 18:06:46,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257772013] [2020-08-21 18:06:46,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 18:06:46,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 18:06:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:06:46,835 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-21 18:06:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:47,235 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-21 18:06:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 18:06:47,236 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-21 18:06:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:47,238 INFO L225 Difference]: With dead ends: 499 [2020-08-21 18:06:47,238 INFO L226 Difference]: Without dead ends: 376 [2020-08-21 18:06:47,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:06:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-21 18:06:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-21 18:06:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-21 18:06:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-21 18:06:47,265 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-21 18:06:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:47,265 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-21 18:06:47,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 18:06:47,266 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-21 18:06:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-21 18:06:47,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:47,267 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:47,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-21 18:06:47,268 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:47,268 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-21 18:06:47,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:47,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417435878] [2020-08-21 18:06:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:47,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:47,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:47,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-21 18:06:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:47,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-21 18:06:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:47,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 18:06:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:48,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417435878] [2020-08-21 18:06:48,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:48,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 18:06:48,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465300927] [2020-08-21 18:06:48,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 18:06:48,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:48,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 18:06:48,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:06:48,007 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-21 18:06:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:49,353 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-21 18:06:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 18:06:49,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-21 18:06:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:49,359 INFO L225 Difference]: With dead ends: 406 [2020-08-21 18:06:49,359 INFO L226 Difference]: Without dead ends: 286 [2020-08-21 18:06:49,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:06:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-21 18:06:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-21 18:06:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-21 18:06:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-21 18:06:49,385 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-21 18:06:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:49,386 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-21 18:06:49,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 18:06:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-21 18:06:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-21 18:06:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:49,392 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:49,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-21 18:06:49,392 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:49,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:49,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-21 18:06:49,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:49,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642245326] [2020-08-21 18:06:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:49,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:49,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:49,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:49,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-21 18:06:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:49,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-21 18:06:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:49,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-21 18:06:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:49,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642245326] [2020-08-21 18:06:49,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:49,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 18:06:49,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107315741] [2020-08-21 18:06:49,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 18:06:49,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:49,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 18:06:49,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-21 18:06:49,970 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-21 18:06:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:50,299 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-21 18:06:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 18:06:50,300 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-21 18:06:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:50,302 INFO L225 Difference]: With dead ends: 516 [2020-08-21 18:06:50,302 INFO L226 Difference]: Without dead ends: 390 [2020-08-21 18:06:50,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:06:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-21 18:06:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-21 18:06:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 18:06:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-21 18:06:50,329 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-21 18:06:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:50,330 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-21 18:06:50,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 18:06:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-21 18:06:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 18:06:50,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:50,332 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:50,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-21 18:06:50,332 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-21 18:06:50,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:50,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103154971] [2020-08-21 18:06:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:50,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:50,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:51,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-21 18:06:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:51,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 18:06:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:51,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-21 18:06:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:51,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103154971] [2020-08-21 18:06:51,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:51,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 18:06:51,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963772388] [2020-08-21 18:06:51,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 18:06:51,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:51,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 18:06:51,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:06:51,126 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-21 18:06:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:52,578 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-21 18:06:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 18:06:52,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-21 18:06:52,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:52,582 INFO L225 Difference]: With dead ends: 418 [2020-08-21 18:06:52,582 INFO L226 Difference]: Without dead ends: 295 [2020-08-21 18:06:52,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:06:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-21 18:06:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-21 18:06:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-21 18:06:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-21 18:06:52,606 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-21 18:06:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:52,606 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-21 18:06:52,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 18:06:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-21 18:06:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-21 18:06:52,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:52,608 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:52,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-21 18:06:52,608 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:52,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-21 18:06:52,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:52,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073647306] [2020-08-21 18:06:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:52,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:52,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:52,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 18:06:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-21 18:06:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-21 18:06:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-21 18:06:53,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073647306] [2020-08-21 18:06:53,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:53,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 18:06:53,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238566128] [2020-08-21 18:06:53,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 18:06:53,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 18:06:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:06:53,222 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-21 18:06:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:53,646 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-21 18:06:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 18:06:53,646 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-21 18:06:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:53,649 INFO L225 Difference]: With dead ends: 533 [2020-08-21 18:06:53,649 INFO L226 Difference]: Without dead ends: 404 [2020-08-21 18:06:53,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:06:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-21 18:06:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-21 18:06:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-21 18:06:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-21 18:06:53,671 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-21 18:06:53,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:53,671 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-21 18:06:53,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 18:06:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-21 18:06:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 18:06:53,672 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:53,673 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:53,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-21 18:06:53,673 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:53,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:53,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-21 18:06:53,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:53,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725573690] [2020-08-21 18:06:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 18:06:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-21 18:06:53,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725573690] [2020-08-21 18:06:53,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:53,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-21 18:06:53,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575764534] [2020-08-21 18:06:53,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:06:53,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:53,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:06:53,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:06:53,861 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-21 18:06:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:54,373 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-21 18:06:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:06:54,375 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-21 18:06:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:54,377 INFO L225 Difference]: With dead ends: 271 [2020-08-21 18:06:54,378 INFO L226 Difference]: Without dead ends: 261 [2020-08-21 18:06:54,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:06:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-21 18:06:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-21 18:06:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-21 18:06:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-21 18:06:54,402 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-21 18:06:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:54,403 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-21 18:06:54,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:06:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-21 18:06:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-21 18:06:54,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:54,405 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:54,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-21 18:06:54,406 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:54,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:54,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-21 18:06:54,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:54,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657933699] [2020-08-21 18:06:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:54,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:54,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:54,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:54,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:54,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:54,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 18:06:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 18:06:54,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657933699] [2020-08-21 18:06:54,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:54,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:06:54,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41716063] [2020-08-21 18:06:54,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:06:54,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:54,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:06:54,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:06:54,713 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-21 18:06:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:54,996 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-21 18:06:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:06:55,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-21 18:06:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:55,005 INFO L225 Difference]: With dead ends: 285 [2020-08-21 18:06:55,006 INFO L226 Difference]: Without dead ends: 280 [2020-08-21 18:06:55,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:06:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-21 18:06:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-21 18:06:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-21 18:06:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-21 18:06:55,058 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-21 18:06:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:55,058 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-21 18:06:55,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:06:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-21 18:06:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-21 18:06:55,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:55,060 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:55,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-21 18:06:55,060 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-21 18:06:55,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:55,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265372056] [2020-08-21 18:06:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 18:06:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-21 18:06:55,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265372056] [2020-08-21 18:06:55,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:55,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 18:06:55,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522093541] [2020-08-21 18:06:55,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 18:06:55,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:55,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 18:06:55,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:06:55,165 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-21 18:06:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:55,223 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-21 18:06:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 18:06:55,224 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-21 18:06:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:55,226 INFO L225 Difference]: With dead ends: 271 [2020-08-21 18:06:55,226 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 18:06:55,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 18:06:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-21 18:06:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-21 18:06:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-21 18:06:55,259 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-21 18:06:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:55,259 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-21 18:06:55,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 18:06:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-21 18:06:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-21 18:06:55,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:55,262 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:55,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-21 18:06:55,262 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-21 18:06:55,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:55,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032578736] [2020-08-21 18:06:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:55,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 18:06:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 18:06:55,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032578736] [2020-08-21 18:06:55,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:55,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:06:55,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407169580] [2020-08-21 18:06:55,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:06:55,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:55,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:06:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:06:55,548 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-21 18:06:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:55,808 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-21 18:06:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:06:55,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-21 18:06:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:55,812 INFO L225 Difference]: With dead ends: 284 [2020-08-21 18:06:55,812 INFO L226 Difference]: Without dead ends: 274 [2020-08-21 18:06:55,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:06:55,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-21 18:06:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-21 18:06:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-21 18:06:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-21 18:06:55,853 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-21 18:06:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:55,853 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-21 18:06:55,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:06:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-21 18:06:55,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 18:06:55,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:55,856 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:55,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-21 18:06:55,857 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-21 18:06:55,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:55,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679756798] [2020-08-21 18:06:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:55,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-21 18:06:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-21 18:06:56,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679756798] [2020-08-21 18:06:56,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:56,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:06:56,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368399530] [2020-08-21 18:06:56,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:56,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:56,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:56,026 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-21 18:06:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:56,163 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-21 18:06:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:06:56,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-21 18:06:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:56,166 INFO L225 Difference]: With dead ends: 303 [2020-08-21 18:06:56,166 INFO L226 Difference]: Without dead ends: 280 [2020-08-21 18:06:56,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:06:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-21 18:06:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-21 18:06:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-21 18:06:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-21 18:06:56,203 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-21 18:06:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:56,204 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-21 18:06:56,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-21 18:06:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-21 18:06:56,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:56,206 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:56,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-21 18:06:56,207 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-21 18:06:56,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:56,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390539001] [2020-08-21 18:06:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 18:06:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-21 18:06:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 18:06:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 18:06:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,339 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-21 18:06:56,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390539001] [2020-08-21 18:06:56,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:56,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 18:06:56,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115225377] [2020-08-21 18:06:56,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:06:56,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:56,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:06:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:56,341 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-21 18:06:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:56,456 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-21 18:06:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:06:56,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-21 18:06:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:56,458 INFO L225 Difference]: With dead ends: 409 [2020-08-21 18:06:56,458 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 18:06:56,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:06:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 18:06:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-21 18:06:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 18:06:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-21 18:06:56,483 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-21 18:06:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:56,483 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-21 18:06:56,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:06:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-21 18:06:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 18:06:56,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:56,485 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:56,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-21 18:06:56,485 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:56,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:56,485 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-21 18:06:56,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:56,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372098976] [2020-08-21 18:06:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 18:06:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-21 18:06:56,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372098976] [2020-08-21 18:06:56,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:06:56,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 18:06:56,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169300685] [2020-08-21 18:06:56,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:56,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:56,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:56,691 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-21 18:06:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:56,835 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-21 18:06:56,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:06:56,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-21 18:06:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:56,838 INFO L225 Difference]: With dead ends: 158 [2020-08-21 18:06:56,838 INFO L226 Difference]: Without dead ends: 143 [2020-08-21 18:06:56,838 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 [2020-08-21 18:06:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-21 18:06:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-21 18:06:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 18:06:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-21 18:06:56,866 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-21 18:06:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:56,867 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-21 18:06:56,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-21 18:06:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 18:06:56,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:56,869 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] [2020-08-21 18:06:56,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-21 18:06:56,870 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-21 18:06:56,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:56,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513371765] [2020-08-21 18:06:56,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:56,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 18:06:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-21 18:06:57,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513371765] [2020-08-21 18:06:57,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:57,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:06:57,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519307955] [2020-08-21 18:06:57,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:57,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:57,027 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-21 18:06:57,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:57,149 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-21 18:06:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:06:57,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-21 18:06:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:57,151 INFO L225 Difference]: With dead ends: 176 [2020-08-21 18:06:57,151 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 18:06:57,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:06:57,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 18:06:57,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-21 18:06:57,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-21 18:06:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-21 18:06:57,181 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-21 18:06:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:57,181 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-21 18:06:57,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-21 18:06:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-21 18:06:57,183 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:57,183 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] [2020-08-21 18:06:57,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-21 18:06:57,184 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:57,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:57,184 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-21 18:06:57,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:57,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137122057] [2020-08-21 18:06:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-21 18:06:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-21 18:06:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-21 18:06:57,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137122057] [2020-08-21 18:06:57,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:57,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:06:57,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290252354] [2020-08-21 18:06:57,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:57,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:57,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:57,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:57,367 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-21 18:06:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:57,573 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-21 18:06:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 18:06:57,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-21 18:06:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:57,577 INFO L225 Difference]: With dead ends: 170 [2020-08-21 18:06:57,577 INFO L226 Difference]: Without dead ends: 150 [2020-08-21 18:06:57,577 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 [2020-08-21 18:06:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-21 18:06:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-21 18:06:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-21 18:06:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-21 18:06:57,604 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-21 18:06:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:57,605 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-21 18:06:57,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-21 18:06:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 18:06:57,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:57,606 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:57,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-21 18:06:57,607 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-21 18:06:57,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:57,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191900899] [2020-08-21 18:06:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 18:06:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 18:06:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-21 18:06:57,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191900899] [2020-08-21 18:06:57,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:57,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:06:57,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903141478] [2020-08-21 18:06:57,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:06:57,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:06:57,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:06:57,771 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-21 18:06:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:57,858 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-21 18:06:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:06:57,859 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-21 18:06:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:57,860 INFO L225 Difference]: With dead ends: 173 [2020-08-21 18:06:57,860 INFO L226 Difference]: Without dead ends: 163 [2020-08-21 18:06:57,861 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 [2020-08-21 18:06:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-21 18:06:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-21 18:06:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-21 18:06:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-21 18:06:57,884 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-21 18:06:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:57,884 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-21 18:06:57,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:06:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-21 18:06:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-21 18:06:57,886 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:06:57,886 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:06:57,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-21 18:06:57,887 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:06:57,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:06:57,887 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-21 18:06:57,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:06:57,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787862515] [2020-08-21 18:06:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:06:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:06:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:57,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:06:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:58,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-21 18:06:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:58,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-21 18:06:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:58,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-21 18:06:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:58,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 18:06:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:06:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-21 18:06:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787862515] [2020-08-21 18:06:58,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:06:58,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:06:58,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572537023] [2020-08-21 18:06:58,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:06:58,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:06:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:06:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:06:58,138 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-21 18:06:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:06:58,291 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-21 18:06:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:06:58,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-21 18:06:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:06:58,292 INFO L225 Difference]: With dead ends: 157 [2020-08-21 18:06:58,292 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:06:58,293 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 [2020-08-21 18:06:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:06:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:06:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:06:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:06:58,295 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-21 18:06:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:06:58,295 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:06:58,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:06:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:06:58,296 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:06:58,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-21 18:06:58,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.