/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:04:06,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:04:06,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:04:06,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:04:06,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:04:06,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:04:06,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:04:06,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:04:06,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:04:06,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:04:06,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:04:06,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:04:06,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:04:06,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:04:06,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:04:06,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:04:06,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:04:06,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:04:06,599 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:04:06,606 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:04:06,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:04:06,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:04:06,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:04:06,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:04:06,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:04:06,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:04:06,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:04:06,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:04:06,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:04:06,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 21:04:06,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:04:06,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:04:06,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:04:06,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:04:06,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:04:06,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:04:06,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:04:06,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:04:06,677 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:04:06,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:04:06,678 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:04:06,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:04:06,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:04:06,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:04:06,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:04:06,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:04:06,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:04:06,680 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:04:06,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:04:06,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:04:06,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:04:06,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:04:06,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:04:06,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:04:06,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:04:06,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:04:06,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:04:06,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:04:06,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:04:06,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:04:06,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:04:06,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:04:06,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:04:06,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:04:06,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:04:07,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:04:07,012 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:04:07,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:04:07,014 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:04:07,015 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-18 21:04:07,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee02c7283/a7d6cf7d68224b4ea15a441725ec07e9/FLAGe9abd257f [2020-08-18 21:04:07,549 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:04:07,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-18 21:04:07,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee02c7283/a7d6cf7d68224b4ea15a441725ec07e9/FLAGe9abd257f [2020-08-18 21:04:07,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee02c7283/a7d6cf7d68224b4ea15a441725ec07e9 [2020-08-18 21:04:07,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:04:07,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:04:07,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:04:07,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:04:07,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:04:07,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:04:07" (1/1) ... [2020-08-18 21:04:07,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3c5dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:07, skipping insertion in model container [2020-08-18 21:04:07,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:04:07" (1/1) ... [2020-08-18 21:04:07,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:04:07,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:04:08,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:04:08,289 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:04:08,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:04:08,444 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:04:08,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08 WrapperNode [2020-08-18 21:04:08,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:04:08,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:04:08,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:04:08,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:04:08,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... [2020-08-18 21:04:08,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... [2020-08-18 21:04:08,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... [2020-08-18 21:04:08,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... [2020-08-18 21:04:08,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... [2020-08-18 21:04:08,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... [2020-08-18 21:04:08,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... [2020-08-18 21:04:08,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:04:08,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:04:08,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:04:08,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:04:08,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:04:08,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:04:08,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:04:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 21:04:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-18 21:04:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-18 21:04:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-18 21:04:08,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:04:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:04:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 21:04:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 21:04:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 21:04:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-18 21:04:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-18 21:04:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-18 21:04:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:04:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:04:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:04:08,981 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:04:08,982 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 21:04:08,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:04:08 BoogieIcfgContainer [2020-08-18 21:04:08,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:04:08,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:04:08,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:04:08,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:04:08,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:04:07" (1/3) ... [2020-08-18 21:04:08,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9a13a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:04:08, skipping insertion in model container [2020-08-18 21:04:08,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:04:08" (2/3) ... [2020-08-18 21:04:09,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a9a13a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:04:08, skipping insertion in model container [2020-08-18 21:04:09,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:04:08" (3/3) ... [2020-08-18 21:04:09,002 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-18 21:04:09,012 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:04:09,022 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:04:09,033 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:04:09,057 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:04:09,057 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:04:09,058 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:04:09,058 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:04:09,058 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:04:09,058 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:04:09,058 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:04:09,059 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:04:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-18 21:04:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 21:04:09,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:09,089 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] [2020-08-18 21:04:09,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:09,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-18 21:04:09,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:09,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748613123] [2020-08-18 21:04:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 21:04:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 21:04:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 21:04:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:09,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748613123] [2020-08-18 21:04:09,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:09,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 21:04:09,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301910703] [2020-08-18 21:04:09,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:04:09,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:04:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:04:09,482 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-18 21:04:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:09,699 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-18 21:04:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:04:09,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-18 21:04:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:09,714 INFO L225 Difference]: With dead ends: 136 [2020-08-18 21:04:09,714 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 21:04:09,719 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 [2020-08-18 21:04:09,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 21:04:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-18 21:04:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 21:04:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-18 21:04:09,776 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-18 21:04:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:09,777 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-18 21:04:09,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:04:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-18 21:04:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 21:04:09,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:09,781 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] [2020-08-18 21:04:09,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:04:09,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-18 21:04:09,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:09,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448065977] [2020-08-18 21:04:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 21:04:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 21:04:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:04:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:09,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448065977] [2020-08-18 21:04:09,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:09,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 21:04:09,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490079726] [2020-08-18 21:04:09,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:04:09,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:09,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:04:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:04:09,909 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-18 21:04:10,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:10,004 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-18 21:04:10,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:04:10,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-18 21:04:10,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:10,021 INFO L225 Difference]: With dead ends: 129 [2020-08-18 21:04:10,021 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 21:04:10,023 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 [2020-08-18 21:04:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 21:04:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-18 21:04:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 21:04:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-18 21:04:10,043 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-18 21:04:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:10,043 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-18 21:04:10,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:04:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-18 21:04:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 21:04:10,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:10,047 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] [2020-08-18 21:04:10,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:04:10,047 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-18 21:04:10,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:10,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607421896] [2020-08-18 21:04:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 21:04:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 21:04:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:04:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:10,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607421896] [2020-08-18 21:04:10,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:10,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:04:10,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489622871] [2020-08-18 21:04:10,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:04:10,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:10,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:04:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:04:10,269 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-18 21:04:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:10,403 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-18 21:04:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:04:10,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-18 21:04:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:10,406 INFO L225 Difference]: With dead ends: 145 [2020-08-18 21:04:10,406 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 21:04:10,407 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 [2020-08-18 21:04:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 21:04:10,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-18 21:04:10,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 21:04:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-18 21:04:10,422 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-18 21:04:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:10,423 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-18 21:04:10,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:04:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-18 21:04:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 21:04:10,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:10,426 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] [2020-08-18 21:04:10,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:04:10,426 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:10,427 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-18 21:04:10,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:10,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389270094] [2020-08-18 21:04:10,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 21:04:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 21:04:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:04:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:10,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389270094] [2020-08-18 21:04:10,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:10,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:04:10,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903143880] [2020-08-18 21:04:10,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:04:10,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:10,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:04:10,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:04:10,563 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-18 21:04:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:10,645 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-18 21:04:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:04:10,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 21:04:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:10,648 INFO L225 Difference]: With dead ends: 156 [2020-08-18 21:04:10,648 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 21:04:10,650 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 [2020-08-18 21:04:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 21:04:10,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-18 21:04:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 21:04:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-18 21:04:10,664 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-18 21:04:10,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:10,665 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-18 21:04:10,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:04:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-18 21:04:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 21:04:10,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:10,668 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] [2020-08-18 21:04:10,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:04:10,669 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-18 21:04:10,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:10,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312819607] [2020-08-18 21:04:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 21:04:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 21:04:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 21:04:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:10,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312819607] [2020-08-18 21:04:10,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:10,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:04:10,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739970475] [2020-08-18 21:04:10,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:04:10,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:10,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:04:10,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:04:10,859 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-18 21:04:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:10,986 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-18 21:04:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:04:10,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-18 21:04:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:10,990 INFO L225 Difference]: With dead ends: 166 [2020-08-18 21:04:10,990 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 21:04:10,992 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 [2020-08-18 21:04:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 21:04:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-18 21:04:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 21:04:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-18 21:04:11,022 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-18 21:04:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:11,023 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-18 21:04:11,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:04:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-18 21:04:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 21:04:11,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:11,029 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] [2020-08-18 21:04:11,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:04:11,033 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:11,034 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-18 21:04:11,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:11,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871329159] [2020-08-18 21:04:11,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 21:04:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 21:04:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:04:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:11,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871329159] [2020-08-18 21:04:11,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:11,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:04:11,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448898229] [2020-08-18 21:04:11,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:04:11,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:11,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:04:11,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:04:11,196 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-18 21:04:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:11,289 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-18 21:04:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:04:11,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-18 21:04:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:11,291 INFO L225 Difference]: With dead ends: 176 [2020-08-18 21:04:11,292 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 21:04:11,293 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 [2020-08-18 21:04:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 21:04:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-18 21:04:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 21:04:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-18 21:04:11,306 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-18 21:04:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:11,306 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-18 21:04:11,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:04:11,307 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-18 21:04:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 21:04:11,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:11,308 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] [2020-08-18 21:04:11,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:04:11,309 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-18 21:04:11,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:11,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719257345] [2020-08-18 21:04:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 21:04:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:04:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 21:04:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:11,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719257345] [2020-08-18 21:04:11,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:11,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:04:11,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047076007] [2020-08-18 21:04:11,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:04:11,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:11,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:04:11,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:04:11,446 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-18 21:04:11,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:11,664 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-18 21:04:11,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:04:11,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-18 21:04:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:11,666 INFO L225 Difference]: With dead ends: 178 [2020-08-18 21:04:11,666 INFO L226 Difference]: Without dead ends: 115 [2020-08-18 21:04:11,667 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 [2020-08-18 21:04:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-18 21:04:11,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-18 21:04:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 21:04:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-18 21:04:11,680 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-18 21:04:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:11,681 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-18 21:04:11,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:04:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-18 21:04:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 21:04:11,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:11,682 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] [2020-08-18 21:04:11,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:04:11,683 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-18 21:04:11,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:11,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453637906] [2020-08-18 21:04:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 21:04:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 21:04:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 21:04:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:11,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453637906] [2020-08-18 21:04:11,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:11,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 21:04:11,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914672128] [2020-08-18 21:04:11,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:04:11,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:11,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:04:11,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:04:11,777 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-18 21:04:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:11,862 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-18 21:04:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:04:11,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-18 21:04:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:11,865 INFO L225 Difference]: With dead ends: 193 [2020-08-18 21:04:11,865 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 21:04:11,866 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 [2020-08-18 21:04:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 21:04:11,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-18 21:04:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 21:04:11,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-18 21:04:11,876 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-18 21:04:11,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:11,876 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-18 21:04:11,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:04:11,877 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-18 21:04:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 21:04:11,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:11,878 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] [2020-08-18 21:04:11,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:04:11,878 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:11,879 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-18 21:04:11,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:11,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637353506] [2020-08-18 21:04:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:11,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 21:04:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:04:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 21:04:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:12,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637353506] [2020-08-18 21:04:12,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:12,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:04:12,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658062824] [2020-08-18 21:04:12,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:04:12,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:12,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:04:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:04:12,043 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-18 21:04:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:12,225 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-18 21:04:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:04:12,226 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-18 21:04:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:12,228 INFO L225 Difference]: With dead ends: 190 [2020-08-18 21:04:12,228 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 21:04:12,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:04:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 21:04:12,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-18 21:04:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 21:04:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-18 21:04:12,246 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-18 21:04:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:12,247 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-18 21:04:12,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:04:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-18 21:04:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 21:04:12,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:12,249 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] [2020-08-18 21:04:12,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:04:12,249 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:12,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-18 21:04:12,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:12,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652517140] [2020-08-18 21:04:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 21:04:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 21:04:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 21:04:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:12,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652517140] [2020-08-18 21:04:12,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:12,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 21:04:12,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742412036] [2020-08-18 21:04:12,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:04:12,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:04:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:04:12,399 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-18 21:04:12,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:12,491 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-18 21:04:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:04:12,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 21:04:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:12,494 INFO L225 Difference]: With dead ends: 210 [2020-08-18 21:04:12,494 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 21:04:12,495 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 [2020-08-18 21:04:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 21:04:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-18 21:04:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 21:04:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-18 21:04:12,505 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-18 21:04:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:12,505 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-18 21:04:12,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:04:12,505 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-18 21:04:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 21:04:12,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:12,506 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] [2020-08-18 21:04:12,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 21:04:12,507 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-18 21:04:12,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:12,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312492913] [2020-08-18 21:04:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 21:04:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:04:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 21:04:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:12,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312492913] [2020-08-18 21:04:12,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:12,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:04:12,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906662875] [2020-08-18 21:04:12,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:04:12,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:12,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:04:12,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:04:12,666 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-18 21:04:12,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:12,833 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-18 21:04:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:12,836 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-18 21:04:12,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:12,838 INFO L225 Difference]: With dead ends: 202 [2020-08-18 21:04:12,838 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 21:04:12,839 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 [2020-08-18 21:04:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 21:04:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-18 21:04:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-18 21:04:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-18 21:04:12,852 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-18 21:04:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:12,853 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-18 21:04:12,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:04:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-18 21:04:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 21:04:12,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:12,856 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] [2020-08-18 21:04:12,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 21:04:12,857 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-18 21:04:12,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:12,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215090145] [2020-08-18 21:04:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 21:04:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 21:04:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 21:04:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:12,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215090145] [2020-08-18 21:04:12,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:12,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:04:12,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916515869] [2020-08-18 21:04:12,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:04:12,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:12,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:04:12,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:04:12,979 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-18 21:04:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:13,083 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-18 21:04:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:13,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 21:04:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:13,085 INFO L225 Difference]: With dead ends: 227 [2020-08-18 21:04:13,085 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 21:04:13,086 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 [2020-08-18 21:04:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 21:04:13,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-18 21:04:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 21:04:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-18 21:04:13,096 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-18 21:04:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:13,096 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-18 21:04:13,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:04:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-18 21:04:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 21:04:13,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:13,098 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] [2020-08-18 21:04:13,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 21:04:13,098 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-18 21:04:13,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:13,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366622152] [2020-08-18 21:04:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 21:04:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 21:04:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 21:04:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:13,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366622152] [2020-08-18 21:04:13,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:13,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:04:13,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098821682] [2020-08-18 21:04:13,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:04:13,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:13,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:04:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:04:13,288 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-18 21:04:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:13,498 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-18 21:04:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:04:13,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-18 21:04:13,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:13,500 INFO L225 Difference]: With dead ends: 214 [2020-08-18 21:04:13,500 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 21:04:13,501 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 [2020-08-18 21:04:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 21:04:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-18 21:04:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 21:04:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-18 21:04:13,512 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-18 21:04:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:13,512 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-18 21:04:13,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:04:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-18 21:04:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 21:04:13,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:13,513 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] [2020-08-18 21:04:13,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 21:04:13,514 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-18 21:04:13,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:13,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889414763] [2020-08-18 21:04:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 21:04:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 21:04:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 21:04:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:13,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889414763] [2020-08-18 21:04:13,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:13,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:04:13,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37012290] [2020-08-18 21:04:13,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:04:13,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:13,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:04:13,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:04:13,653 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-18 21:04:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:13,770 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-18 21:04:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:04:13,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-18 21:04:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:13,772 INFO L225 Difference]: With dead ends: 244 [2020-08-18 21:04:13,773 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 21:04:13,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:04:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 21:04:13,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-18 21:04:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 21:04:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-18 21:04:13,783 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-18 21:04:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:13,783 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-18 21:04:13,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:04:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-18 21:04:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 21:04:13,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:13,784 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] [2020-08-18 21:04:13,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 21:04:13,785 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:13,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-18 21:04:13,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:13,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927432174] [2020-08-18 21:04:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 21:04:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 21:04:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 21:04:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:13,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927432174] [2020-08-18 21:04:13,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:13,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:04:13,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345015831] [2020-08-18 21:04:13,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:04:13,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:04:13,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:04:13,965 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-18 21:04:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:14,199 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-18 21:04:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:04:14,200 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-18 21:04:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:14,202 INFO L225 Difference]: With dead ends: 226 [2020-08-18 21:04:14,202 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 21:04:14,203 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 [2020-08-18 21:04:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 21:04:14,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-18 21:04:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 21:04:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-18 21:04:14,213 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-18 21:04:14,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:14,213 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-18 21:04:14,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:04:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-18 21:04:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 21:04:14,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:14,215 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] [2020-08-18 21:04:14,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 21:04:14,215 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-18 21:04:14,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:14,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12156479] [2020-08-18 21:04:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 21:04:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 21:04:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 21:04:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:14,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12156479] [2020-08-18 21:04:14,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:14,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:04:14,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079281808] [2020-08-18 21:04:14,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:04:14,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:14,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:04:14,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:04:14,374 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-18 21:04:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:14,518 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-18 21:04:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 21:04:14,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-18 21:04:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:14,521 INFO L225 Difference]: With dead ends: 261 [2020-08-18 21:04:14,521 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 21:04:14,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:04:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 21:04:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-18 21:04:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 21:04:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-18 21:04:14,533 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-18 21:04:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:14,533 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-18 21:04:14,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:04:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-18 21:04:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-18 21:04:14,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:14,534 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] [2020-08-18 21:04:14,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 21:04:14,535 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:14,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-18 21:04:14,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:14,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201436529] [2020-08-18 21:04:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 21:04:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 21:04:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 21:04:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:14,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201436529] [2020-08-18 21:04:14,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:14,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:04:14,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089607804] [2020-08-18 21:04:14,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:04:14,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:04:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:04:14,746 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-18 21:04:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:15,005 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-18 21:04:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 21:04:15,006 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-18 21:04:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:15,009 INFO L225 Difference]: With dead ends: 238 [2020-08-18 21:04:15,009 INFO L226 Difference]: Without dead ends: 160 [2020-08-18 21:04:15,010 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 [2020-08-18 21:04:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-18 21:04:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-18 21:04:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 21:04:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-18 21:04:15,024 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-18 21:04:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:15,025 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-18 21:04:15,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:04:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-18 21:04:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 21:04:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:15,028 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] [2020-08-18 21:04:15,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 21:04:15,028 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-18 21:04:15,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:15,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561250757] [2020-08-18 21:04:15,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 21:04:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 21:04:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 21:04:15,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:15,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561250757] [2020-08-18 21:04:15,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:15,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:04:15,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26611873] [2020-08-18 21:04:15,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:04:15,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:04:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:04:15,217 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-18 21:04:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:15,399 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-18 21:04:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 21:04:15,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-18 21:04:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:15,403 INFO L225 Difference]: With dead ends: 278 [2020-08-18 21:04:15,403 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 21:04:15,404 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 [2020-08-18 21:04:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 21:04:15,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-18 21:04:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 21:04:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-18 21:04:15,416 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-18 21:04:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:15,416 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-18 21:04:15,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:04:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-18 21:04:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 21:04:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:15,418 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] [2020-08-18 21:04:15,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 21:04:15,419 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:15,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-18 21:04:15,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:15,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754506195] [2020-08-18 21:04:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 21:04:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 21:04:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 21:04:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:15,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754506195] [2020-08-18 21:04:15,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:15,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:04:15,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810548198] [2020-08-18 21:04:15,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:04:15,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:04:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:04:15,705 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-18 21:04:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:15,949 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-18 21:04:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:04:15,950 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-18 21:04:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:15,951 INFO L225 Difference]: With dead ends: 250 [2020-08-18 21:04:15,951 INFO L226 Difference]: Without dead ends: 169 [2020-08-18 21:04:15,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:04:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-18 21:04:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-18 21:04:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 21:04:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-18 21:04:15,964 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-18 21:04:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:15,964 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-18 21:04:15,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:04:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-18 21:04:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 21:04:15,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:15,966 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] [2020-08-18 21:04:15,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 21:04:15,966 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:15,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:15,966 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-18 21:04:15,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:15,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603057324] [2020-08-18 21:04:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:15,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 21:04:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 21:04:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:04:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:16,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603057324] [2020-08-18 21:04:16,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:16,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:04:16,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238132514] [2020-08-18 21:04:16,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:04:16,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:16,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:04:16,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:04:16,141 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-18 21:04:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:16,286 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-18 21:04:16,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:04:16,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-18 21:04:16,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:16,288 INFO L225 Difference]: With dead ends: 295 [2020-08-18 21:04:16,288 INFO L226 Difference]: Without dead ends: 208 [2020-08-18 21:04:16,289 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 [2020-08-18 21:04:16,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-18 21:04:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-18 21:04:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 21:04:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-18 21:04:16,318 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-18 21:04:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:16,318 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-18 21:04:16,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:04:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-18 21:04:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 21:04:16,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:16,320 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] [2020-08-18 21:04:16,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 21:04:16,320 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:16,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-18 21:04:16,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:16,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910596759] [2020-08-18 21:04:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 21:04:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 21:04:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:04:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:16,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910596759] [2020-08-18 21:04:16,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:16,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:04:16,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090308199] [2020-08-18 21:04:16,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:04:16,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:04:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:04:16,666 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-18 21:04:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:17,060 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-18 21:04:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:04:17,060 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-18 21:04:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:17,062 INFO L225 Difference]: With dead ends: 262 [2020-08-18 21:04:17,062 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 21:04:17,063 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 [2020-08-18 21:04:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 21:04:17,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-18 21:04:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-18 21:04:17,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-18 21:04:17,075 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-18 21:04:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:17,076 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-18 21:04:17,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:04:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-18 21:04:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 21:04:17,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:17,077 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] [2020-08-18 21:04:17,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 21:04:17,079 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-18 21:04:17,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:17,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286416106] [2020-08-18 21:04:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 21:04:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 21:04:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 21:04:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:17,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286416106] [2020-08-18 21:04:17,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:17,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:04:17,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267193439] [2020-08-18 21:04:17,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 21:04:17,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:17,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 21:04:17,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:04:17,287 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-18 21:04:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:17,474 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-18 21:04:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:04:17,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-18 21:04:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:17,479 INFO L225 Difference]: With dead ends: 312 [2020-08-18 21:04:17,479 INFO L226 Difference]: Without dead ends: 222 [2020-08-18 21:04:17,481 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 [2020-08-18 21:04:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-18 21:04:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-18 21:04:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 21:04:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-18 21:04:17,513 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-18 21:04:17,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:17,513 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-18 21:04:17,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 21:04:17,513 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-18 21:04:17,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 21:04:17,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:17,514 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] [2020-08-18 21:04:17,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 21:04:17,514 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:17,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:17,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-18 21:04:17,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:17,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944100063] [2020-08-18 21:04:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 21:04:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 21:04:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 21:04:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:17,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944100063] [2020-08-18 21:04:17,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:17,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 21:04:17,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941019395] [2020-08-18 21:04:17,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 21:04:17,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 21:04:17,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:04:17,816 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-18 21:04:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:18,231 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-18 21:04:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:04:18,231 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-18 21:04:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:18,233 INFO L225 Difference]: With dead ends: 274 [2020-08-18 21:04:18,233 INFO L226 Difference]: Without dead ends: 187 [2020-08-18 21:04:18,234 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 [2020-08-18 21:04:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-18 21:04:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-18 21:04:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 21:04:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-18 21:04:18,249 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-18 21:04:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:18,250 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-18 21:04:18,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 21:04:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-18 21:04:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 21:04:18,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:18,252 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] [2020-08-18 21:04:18,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 21:04:18,253 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:18,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:18,253 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-18 21:04:18,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:18,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428463675] [2020-08-18 21:04:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 21:04:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 21:04:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 21:04:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:18,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428463675] [2020-08-18 21:04:18,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:18,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 21:04:18,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138388291] [2020-08-18 21:04:18,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 21:04:18,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 21:04:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:04:18,463 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-18 21:04:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:18,645 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-18 21:04:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 21:04:18,645 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-18 21:04:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:18,647 INFO L225 Difference]: With dead ends: 329 [2020-08-18 21:04:18,647 INFO L226 Difference]: Without dead ends: 236 [2020-08-18 21:04:18,648 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 [2020-08-18 21:04:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-18 21:04:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-18 21:04:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 21:04:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-18 21:04:18,661 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-18 21:04:18,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:18,661 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-18 21:04:18,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 21:04:18,661 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-18 21:04:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 21:04:18,662 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:18,662 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] [2020-08-18 21:04:18,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 21:04:18,665 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:18,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-18 21:04:18,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:18,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133201678] [2020-08-18 21:04:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:18,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 21:04:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:04:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 21:04:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:19,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133201678] [2020-08-18 21:04:19,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:19,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 21:04:19,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099721602] [2020-08-18 21:04:19,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 21:04:19,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 21:04:19,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-18 21:04:19,155 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-18 21:04:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:19,729 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-18 21:04:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 21:04:19,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-18 21:04:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:19,731 INFO L225 Difference]: With dead ends: 286 [2020-08-18 21:04:19,731 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 21:04:19,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:04:19,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 21:04:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-18 21:04:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 21:04:19,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-18 21:04:19,747 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-18 21:04:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:19,748 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-18 21:04:19,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 21:04:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-18 21:04:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 21:04:19,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:19,749 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] [2020-08-18 21:04:19,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 21:04:19,750 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:19,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-18 21:04:19,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:19,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637766604] [2020-08-18 21:04:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 21:04:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 21:04:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 21:04:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:20,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637766604] [2020-08-18 21:04:20,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:20,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 21:04:20,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832718228] [2020-08-18 21:04:20,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 21:04:20,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 21:04:20,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 21:04:20,024 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-18 21:04:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:20,255 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-18 21:04:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 21:04:20,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-18 21:04:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:20,257 INFO L225 Difference]: With dead ends: 346 [2020-08-18 21:04:20,258 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 21:04:20,259 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 [2020-08-18 21:04:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 21:04:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-18 21:04:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 21:04:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-18 21:04:20,272 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-18 21:04:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:20,272 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-18 21:04:20,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 21:04:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-18 21:04:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 21:04:20,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:20,273 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] [2020-08-18 21:04:20,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 21:04:20,274 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:20,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:20,274 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-18 21:04:20,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:20,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717763105] [2020-08-18 21:04:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 21:04:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 21:04:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:04:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 21:04:20,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717763105] [2020-08-18 21:04:20,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:04:20,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 21:04:20,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61327324] [2020-08-18 21:04:20,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 21:04:20,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:20,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 21:04:20,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 21:04:20,348 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-18 21:04:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:20,364 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-18 21:04:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 21:04:20,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-18 21:04:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:20,366 INFO L225 Difference]: With dead ends: 160 [2020-08-18 21:04:20,366 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 21:04:20,367 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 [2020-08-18 21:04:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 21:04:20,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 21:04:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 21:04:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-18 21:04:20,379 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-18 21:04:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:20,380 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-18 21:04:20,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 21:04:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-18 21:04:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 21:04:20,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:20,381 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] [2020-08-18 21:04:20,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 21:04:20,382 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-18 21:04:20,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:20,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58990906] [2020-08-18 21:04:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 21:04:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 21:04:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 21:04:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 21:04:20,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58990906] [2020-08-18 21:04:20,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:04:20,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:04:20,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459502223] [2020-08-18 21:04:20,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:04:20,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:04:20,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:04:20,450 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-18 21:04:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:20,474 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-18 21:04:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:04:20,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-18 21:04:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:20,476 INFO L225 Difference]: With dead ends: 161 [2020-08-18 21:04:20,476 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 21:04:20,477 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 [2020-08-18 21:04:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 21:04:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 21:04:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 21:04:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-18 21:04:20,493 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-18 21:04:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:20,494 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-18 21:04:20,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:04:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-18 21:04:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 21:04:20,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:20,496 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] [2020-08-18 21:04:20,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 21:04:20,496 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-18 21:04:20,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:20,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914904828] [2020-08-18 21:04:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 21:04:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 21:04:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 21:04:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:20,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914904828] [2020-08-18 21:04:20,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:20,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 21:04:20,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585938565] [2020-08-18 21:04:20,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 21:04:20,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:20,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 21:04:20,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:04:20,881 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-18 21:04:21,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:21,457 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-18 21:04:21,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 21:04:21,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-18 21:04:21,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:21,460 INFO L225 Difference]: With dead ends: 298 [2020-08-18 21:04:21,460 INFO L226 Difference]: Without dead ends: 205 [2020-08-18 21:04:21,461 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 [2020-08-18 21:04:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-18 21:04:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-18 21:04:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 21:04:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-18 21:04:21,474 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-18 21:04:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:21,474 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-18 21:04:21,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 21:04:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-18 21:04:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 21:04:21,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:21,476 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] [2020-08-18 21:04:21,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 21:04:21,476 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:21,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:21,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-18 21:04:21,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:21,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048353001] [2020-08-18 21:04:21,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:21,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:21,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:21,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 21:04:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:21,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-18 21:04:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:21,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 21:04:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:21,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048353001] [2020-08-18 21:04:21,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:21,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 21:04:21,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696526201] [2020-08-18 21:04:21,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 21:04:21,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 21:04:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:04:21,752 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-18 21:04:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:21,959 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-18 21:04:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 21:04:21,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-18 21:04:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:21,962 INFO L225 Difference]: With dead ends: 363 [2020-08-18 21:04:21,962 INFO L226 Difference]: Without dead ends: 264 [2020-08-18 21:04:21,963 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 [2020-08-18 21:04:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-18 21:04:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-18 21:04:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 21:04:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-18 21:04:21,980 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-18 21:04:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:21,980 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-18 21:04:21,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 21:04:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-18 21:04:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 21:04:21,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:21,981 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] [2020-08-18 21:04:21,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 21:04:21,982 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-18 21:04:21,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:21,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689214927] [2020-08-18 21:04:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:22,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:22,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:22,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:22,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 21:04:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:22,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 21:04:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:22,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 21:04:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:22,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689214927] [2020-08-18 21:04:22,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:22,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 21:04:22,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36723039] [2020-08-18 21:04:22,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 21:04:22,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:22,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 21:04:22,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:04:22,451 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-18 21:04:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:23,120 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-18 21:04:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 21:04:23,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-18 21:04:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:23,123 INFO L225 Difference]: With dead ends: 310 [2020-08-18 21:04:23,123 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 21:04:23,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:04:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 21:04:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-18 21:04:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 21:04:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-18 21:04:23,139 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-18 21:04:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:23,140 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-18 21:04:23,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 21:04:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-18 21:04:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-18 21:04:23,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:23,141 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] [2020-08-18 21:04:23,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 21:04:23,142 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:23,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-18 21:04:23,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:23,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054971581] [2020-08-18 21:04:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 21:04:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 21:04:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 21:04:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:23,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054971581] [2020-08-18 21:04:23,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:23,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 21:04:23,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194574944] [2020-08-18 21:04:23,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 21:04:23,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:23,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 21:04:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:04:23,448 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-18 21:04:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:23,652 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-18 21:04:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 21:04:23,653 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-18 21:04:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:23,655 INFO L225 Difference]: With dead ends: 380 [2020-08-18 21:04:23,655 INFO L226 Difference]: Without dead ends: 278 [2020-08-18 21:04:23,657 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 [2020-08-18 21:04:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-18 21:04:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-18 21:04:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-18 21:04:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-18 21:04:23,675 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-18 21:04:23,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:23,675 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-18 21:04:23,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 21:04:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-18 21:04:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 21:04:23,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:23,677 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] [2020-08-18 21:04:23,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 21:04:23,678 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-18 21:04:23,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:23,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689128254] [2020-08-18 21:04:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:24,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 21:04:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:24,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 21:04:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:24,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 21:04:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:24,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689128254] [2020-08-18 21:04:24,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:24,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 21:04:24,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870470934] [2020-08-18 21:04:24,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 21:04:24,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 21:04:24,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:04:24,127 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-18 21:04:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:24,805 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-18 21:04:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 21:04:24,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 21:04:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:24,809 INFO L225 Difference]: With dead ends: 322 [2020-08-18 21:04:24,809 INFO L226 Difference]: Without dead ends: 223 [2020-08-18 21:04:24,813 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 [2020-08-18 21:04:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-18 21:04:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-18 21:04:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-18 21:04:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-18 21:04:24,828 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-18 21:04:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:24,829 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-18 21:04:24,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 21:04:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-18 21:04:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 21:04:24,831 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:24,831 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] [2020-08-18 21:04:24,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 21:04:24,832 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-18 21:04:24,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:24,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576533830] [2020-08-18 21:04:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:24,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:24,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 21:04:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 21:04:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 21:04:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:25,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576533830] [2020-08-18 21:04:25,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:25,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 21:04:25,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747679725] [2020-08-18 21:04:25,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 21:04:25,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:25,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 21:04:25,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 21:04:25,144 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-18 21:04:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:25,390 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-18 21:04:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 21:04:25,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-18 21:04:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:25,400 INFO L225 Difference]: With dead ends: 397 [2020-08-18 21:04:25,400 INFO L226 Difference]: Without dead ends: 292 [2020-08-18 21:04:25,401 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 [2020-08-18 21:04:25,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-18 21:04:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-18 21:04:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-18 21:04:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-18 21:04:25,416 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-18 21:04:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:25,417 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-18 21:04:25,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 21:04:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-18 21:04:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 21:04:25,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:25,418 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] [2020-08-18 21:04:25,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 21:04:25,419 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:25,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:25,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-18 21:04:25,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:25,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625211693] [2020-08-18 21:04:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 21:04:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 21:04:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 21:04:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:25,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625211693] [2020-08-18 21:04:25,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:25,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 21:04:25,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658114616] [2020-08-18 21:04:25,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 21:04:25,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:25,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 21:04:25,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-18 21:04:25,928 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-18 21:04:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:26,681 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-18 21:04:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 21:04:26,689 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-18 21:04:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:26,693 INFO L225 Difference]: With dead ends: 334 [2020-08-18 21:04:26,693 INFO L226 Difference]: Without dead ends: 232 [2020-08-18 21:04:26,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:04:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-18 21:04:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-18 21:04:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 21:04:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-18 21:04:26,709 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-18 21:04:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:26,710 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-18 21:04:26,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 21:04:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-18 21:04:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-18 21:04:26,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:26,712 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] [2020-08-18 21:04:26,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 21:04:26,712 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-18 21:04:26,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:26,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224184353] [2020-08-18 21:04:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:26,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:26,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:26,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 21:04:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 21:04:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 21:04:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:27,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224184353] [2020-08-18 21:04:27,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:27,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 21:04:27,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383743938] [2020-08-18 21:04:27,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 21:04:27,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 21:04:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 21:04:27,050 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-18 21:04:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:27,351 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-18 21:04:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 21:04:27,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-18 21:04:27,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:27,354 INFO L225 Difference]: With dead ends: 414 [2020-08-18 21:04:27,354 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 21:04:27,355 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 [2020-08-18 21:04:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 21:04:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-18 21:04:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-18 21:04:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-18 21:04:27,372 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-18 21:04:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:27,372 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-18 21:04:27,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 21:04:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-18 21:04:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 21:04:27,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:27,376 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] [2020-08-18 21:04:27,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 21:04:27,377 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-18 21:04:27,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:27,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489933349] [2020-08-18 21:04:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 21:04:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 21:04:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 21:04:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:27,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489933349] [2020-08-18 21:04:27,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:27,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 21:04:27,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433231241] [2020-08-18 21:04:27,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 21:04:27,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 21:04:27,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:04:27,897 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-18 21:04:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:28,686 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-18 21:04:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 21:04:28,687 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-18 21:04:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:28,688 INFO L225 Difference]: With dead ends: 346 [2020-08-18 21:04:28,689 INFO L226 Difference]: Without dead ends: 241 [2020-08-18 21:04:28,689 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 [2020-08-18 21:04:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-18 21:04:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-18 21:04:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 21:04:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-18 21:04:28,704 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-18 21:04:28,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:28,704 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-18 21:04:28,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 21:04:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-18 21:04:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-18 21:04:28,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:28,706 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] [2020-08-18 21:04:28,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 21:04:28,706 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:28,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:28,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-18 21:04:28,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:28,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095961200] [2020-08-18 21:04:28,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:28,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:28,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:28,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 21:04:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 21:04:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 21:04:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:29,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095961200] [2020-08-18 21:04:29,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:29,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 21:04:29,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943783221] [2020-08-18 21:04:29,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 21:04:29,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:29,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 21:04:29,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 21:04:29,103 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-18 21:04:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:29,407 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-18 21:04:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 21:04:29,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-18 21:04:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:29,411 INFO L225 Difference]: With dead ends: 431 [2020-08-18 21:04:29,411 INFO L226 Difference]: Without dead ends: 320 [2020-08-18 21:04:29,412 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 [2020-08-18 21:04:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-18 21:04:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-18 21:04:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-18 21:04:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-18 21:04:29,427 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-18 21:04:29,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:29,428 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-18 21:04:29,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 21:04:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-18 21:04:29,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 21:04:29,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:29,430 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] [2020-08-18 21:04:29,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 21:04:29,430 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-18 21:04:29,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:29,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042820323] [2020-08-18 21:04:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 21:04:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 21:04:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:04:29,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:29,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042820323] [2020-08-18 21:04:29,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:29,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 21:04:29,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220980224] [2020-08-18 21:04:29,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 21:04:29,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:29,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 21:04:29,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-18 21:04:29,950 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-18 21:04:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:30,794 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-18 21:04:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 21:04:30,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-18 21:04:30,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:30,797 INFO L225 Difference]: With dead ends: 358 [2020-08-18 21:04:30,797 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 21:04:30,798 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 [2020-08-18 21:04:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 21:04:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-18 21:04:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-18 21:04:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-18 21:04:30,812 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-18 21:04:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:30,812 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-18 21:04:30,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 21:04:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-18 21:04:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 21:04:30,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:30,814 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] [2020-08-18 21:04:30,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 21:04:30,814 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-18 21:04:30,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:30,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35975482] [2020-08-18 21:04:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:30,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:30,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:30,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:31,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 21:04:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:31,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 21:04:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:31,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:31,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35975482] [2020-08-18 21:04:31,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:31,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 21:04:31,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92675241] [2020-08-18 21:04:31,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 21:04:31,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:31,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 21:04:31,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 21:04:31,204 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-18 21:04:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:31,474 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-18 21:04:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 21:04:31,477 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-18 21:04:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:31,479 INFO L225 Difference]: With dead ends: 448 [2020-08-18 21:04:31,479 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 21:04:31,480 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 [2020-08-18 21:04:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 21:04:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-18 21:04:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 21:04:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-18 21:04:31,506 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-18 21:04:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:31,506 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-18 21:04:31,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 21:04:31,506 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-18 21:04:31,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 21:04:31,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:31,508 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] [2020-08-18 21:04:31,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 21:04:31,508 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:31,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:31,509 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-18 21:04:31,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:31,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765415066] [2020-08-18 21:04:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:31,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:31,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:32,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 21:04:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:32,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 21:04:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:32,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 21:04:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:32,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765415066] [2020-08-18 21:04:32,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:32,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 21:04:32,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255553703] [2020-08-18 21:04:32,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 21:04:32,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 21:04:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-18 21:04:32,159 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-18 21:04:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:33,066 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-18 21:04:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:04:33,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-18 21:04:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:33,069 INFO L225 Difference]: With dead ends: 370 [2020-08-18 21:04:33,069 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 21:04:33,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-18 21:04:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 21:04:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-18 21:04:33,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-18 21:04:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-18 21:04:33,085 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-18 21:04:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:33,086 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-18 21:04:33,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 21:04:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-18 21:04:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 21:04:33,087 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:33,087 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] [2020-08-18 21:04:33,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 21:04:33,088 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-18 21:04:33,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:33,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870241280] [2020-08-18 21:04:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:33,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:33,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:33,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:33,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 21:04:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:33,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 21:04:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:33,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 21:04:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:33,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870241280] [2020-08-18 21:04:33,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:33,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 21:04:33,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295877469] [2020-08-18 21:04:33,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 21:04:33,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:33,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 21:04:33,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 21:04:33,588 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-18 21:04:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:33,947 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-18 21:04:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 21:04:33,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-18 21:04:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:33,950 INFO L225 Difference]: With dead ends: 465 [2020-08-18 21:04:33,950 INFO L226 Difference]: Without dead ends: 348 [2020-08-18 21:04:33,951 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 [2020-08-18 21:04:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-18 21:04:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-18 21:04:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-18 21:04:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-18 21:04:33,968 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-18 21:04:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:33,969 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-18 21:04:33,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 21:04:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-18 21:04:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-18 21:04:33,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:33,970 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] [2020-08-18 21:04:33,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 21:04:33,971 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-18 21:04:33,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:33,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337150017] [2020-08-18 21:04:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:34,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:34,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:34,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:34,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 21:04:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:34,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 21:04:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:34,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 21:04:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:34,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337150017] [2020-08-18 21:04:34,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:34,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 21:04:34,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022542024] [2020-08-18 21:04:34,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 21:04:34,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:34,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 21:04:34,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-18 21:04:34,661 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-18 21:04:35,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:35,775 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-18 21:04:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 21:04:35,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-18 21:04:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:35,777 INFO L225 Difference]: With dead ends: 382 [2020-08-18 21:04:35,778 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 21:04:35,779 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 [2020-08-18 21:04:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 21:04:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-18 21:04:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-18 21:04:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-18 21:04:35,803 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-18 21:04:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:35,805 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-18 21:04:35,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 21:04:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-18 21:04:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-18 21:04:35,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:35,807 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] [2020-08-18 21:04:35,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 21:04:35,808 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-18 21:04:35,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:35,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409196080] [2020-08-18 21:04:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:35,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:35,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:35,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:36,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 21:04:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 21:04:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:36,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 21:04:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:36,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409196080] [2020-08-18 21:04:36,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:36,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 21:04:36,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176437822] [2020-08-18 21:04:36,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 21:04:36,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:36,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 21:04:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 21:04:36,320 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-18 21:04:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:36,768 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-18 21:04:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 21:04:36,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-18 21:04:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:36,771 INFO L225 Difference]: With dead ends: 482 [2020-08-18 21:04:36,771 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 21:04:36,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:04:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 21:04:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-18 21:04:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-18 21:04:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-18 21:04:36,791 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-18 21:04:36,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:36,791 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-18 21:04:36,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 21:04:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-18 21:04:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 21:04:36,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:36,793 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] [2020-08-18 21:04:36,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 21:04:36,793 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-18 21:04:36,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:36,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633976945] [2020-08-18 21:04:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:36,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:36,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:36,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:37,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 21:04:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:37,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 21:04:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:37,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 21:04:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:37,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633976945] [2020-08-18 21:04:37,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:37,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 21:04:37,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487637480] [2020-08-18 21:04:37,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 21:04:37,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 21:04:37,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:04:37,521 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-18 21:04:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:38,716 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-18 21:04:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 21:04:38,719 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-18 21:04:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:38,721 INFO L225 Difference]: With dead ends: 394 [2020-08-18 21:04:38,721 INFO L226 Difference]: Without dead ends: 277 [2020-08-18 21:04:38,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-18 21:04:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-18 21:04:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-18 21:04:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-18 21:04:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-18 21:04:38,739 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-18 21:04:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:38,740 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-18 21:04:38,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 21:04:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-18 21:04:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-18 21:04:38,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:38,741 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] [2020-08-18 21:04:38,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 21:04:38,741 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-18 21:04:38,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:38,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435571736] [2020-08-18 21:04:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:38,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:38,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:38,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:39,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 21:04:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:39,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 21:04:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:39,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 21:04:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:39,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435571736] [2020-08-18 21:04:39,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:39,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 21:04:39,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147689438] [2020-08-18 21:04:39,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 21:04:39,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:39,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 21:04:39,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 21:04:39,224 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-18 21:04:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:39,563 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-18 21:04:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 21:04:39,563 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-18 21:04:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:39,565 INFO L225 Difference]: With dead ends: 499 [2020-08-18 21:04:39,566 INFO L226 Difference]: Without dead ends: 376 [2020-08-18 21:04:39,567 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 [2020-08-18 21:04:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-18 21:04:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-18 21:04:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-18 21:04:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-18 21:04:39,587 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-18 21:04:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:39,587 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-18 21:04:39,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 21:04:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-18 21:04:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 21:04:39,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:39,589 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] [2020-08-18 21:04:39,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-18 21:04:39,589 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-18 21:04:39,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:39,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699478639] [2020-08-18 21:04:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:39,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:39,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:39,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:40,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 21:04:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:40,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 21:04:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:40,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 21:04:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:40,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699478639] [2020-08-18 21:04:40,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:40,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 21:04:40,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898646768] [2020-08-18 21:04:40,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 21:04:40,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:40,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 21:04:40,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-18 21:04:40,310 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-18 21:04:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:41,586 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-18 21:04:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 21:04:41,587 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-18 21:04:41,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:41,589 INFO L225 Difference]: With dead ends: 406 [2020-08-18 21:04:41,589 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 21:04:41,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-18 21:04:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 21:04:41,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-18 21:04:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 21:04:41,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-18 21:04:41,609 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-18 21:04:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:41,610 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-18 21:04:41,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 21:04:41,610 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-18 21:04:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-18 21:04:41,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:41,611 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] [2020-08-18 21:04:41,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-18 21:04:41,612 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:41,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-18 21:04:41,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:41,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12650945] [2020-08-18 21:04:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:41,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:41,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:41,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:42,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 21:04:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:42,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 21:04:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:42,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 21:04:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:42,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12650945] [2020-08-18 21:04:42,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:42,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 21:04:42,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854141546] [2020-08-18 21:04:42,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 21:04:42,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 21:04:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 21:04:42,216 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-18 21:04:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:42,513 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-18 21:04:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 21:04:42,516 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-18 21:04:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:42,520 INFO L225 Difference]: With dead ends: 516 [2020-08-18 21:04:42,520 INFO L226 Difference]: Without dead ends: 390 [2020-08-18 21:04:42,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 21:04:42,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-18 21:04:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-18 21:04:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 21:04:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-18 21:04:42,541 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-18 21:04:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:42,542 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-18 21:04:42,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 21:04:42,542 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-18 21:04:42,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 21:04:42,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:42,543 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] [2020-08-18 21:04:42,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-18 21:04:42,544 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-18 21:04:42,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:42,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934170673] [2020-08-18 21:04:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:42,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:42,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:42,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:43,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 21:04:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:43,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 21:04:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:43,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 21:04:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:43,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934170673] [2020-08-18 21:04:43,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:43,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 21:04:43,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097324656] [2020-08-18 21:04:43,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 21:04:43,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:43,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 21:04:43,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-18 21:04:43,263 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-18 21:04:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:44,716 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-18 21:04:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 21:04:44,717 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-18 21:04:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:44,718 INFO L225 Difference]: With dead ends: 418 [2020-08-18 21:04:44,718 INFO L226 Difference]: Without dead ends: 295 [2020-08-18 21:04:44,719 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 [2020-08-18 21:04:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-18 21:04:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-18 21:04:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-18 21:04:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-18 21:04:44,738 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-18 21:04:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:44,738 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-18 21:04:44,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 21:04:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-18 21:04:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 21:04:44,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:44,740 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] [2020-08-18 21:04:44,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-18 21:04:44,741 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-18 21:04:44,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:44,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002057932] [2020-08-18 21:04:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:44,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:44,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:44,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 21:04:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 21:04:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-18 21:04:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 21:04:45,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002057932] [2020-08-18 21:04:45,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:45,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 21:04:45,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633466274] [2020-08-18 21:04:45,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 21:04:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 21:04:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 21:04:45,297 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-18 21:04:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:45,767 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-18 21:04:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 21:04:45,768 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-18 21:04:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:45,770 INFO L225 Difference]: With dead ends: 533 [2020-08-18 21:04:45,770 INFO L226 Difference]: Without dead ends: 404 [2020-08-18 21:04:45,771 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 [2020-08-18 21:04:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-18 21:04:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-18 21:04:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-18 21:04:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-18 21:04:45,790 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-18 21:04:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:45,790 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-18 21:04:45,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 21:04:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-18 21:04:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 21:04:45,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:45,792 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] [2020-08-18 21:04:45,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-18 21:04:45,792 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:45,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-18 21:04:45,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:45,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419818339] [2020-08-18 21:04:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 21:04:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 21:04:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 21:04:45,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419818339] [2020-08-18 21:04:45,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:04:45,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 21:04:45,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939691865] [2020-08-18 21:04:45,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:04:45,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:45,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:04:45,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:04:45,960 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-18 21:04:46,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:46,167 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-18 21:04:46,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:46,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 21:04:46,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:46,169 INFO L225 Difference]: With dead ends: 271 [2020-08-18 21:04:46,170 INFO L226 Difference]: Without dead ends: 261 [2020-08-18 21:04:46,170 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 [2020-08-18 21:04:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-18 21:04:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-18 21:04:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-18 21:04:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-18 21:04:46,192 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-18 21:04:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:46,193 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-18 21:04:46,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:04:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-18 21:04:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 21:04:46,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:46,195 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] [2020-08-18 21:04:46,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-18 21:04:46,195 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:46,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-18 21:04:46,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:46,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727638969] [2020-08-18 21:04:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 21:04:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 21:04:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 21:04:46,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727638969] [2020-08-18 21:04:46,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:46,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:04:46,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973304934] [2020-08-18 21:04:46,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:04:46,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:04:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:04:46,464 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-18 21:04:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:46,687 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-18 21:04:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:46,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 21:04:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:46,692 INFO L225 Difference]: With dead ends: 285 [2020-08-18 21:04:46,692 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 21:04:46,693 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 [2020-08-18 21:04:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 21:04:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-18 21:04:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 21:04:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-18 21:04:46,728 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-18 21:04:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:46,728 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-18 21:04:46,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:04:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-18 21:04:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 21:04:46,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:46,731 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] [2020-08-18 21:04:46,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-18 21:04:46,731 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-18 21:04:46,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:46,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902949844] [2020-08-18 21:04:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 21:04:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 21:04:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-18 21:04:46,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902949844] [2020-08-18 21:04:46,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:04:46,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 21:04:46,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099136834] [2020-08-18 21:04:46,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:04:46,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:46,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:04:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:04:46,844 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-18 21:04:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:46,906 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-18 21:04:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:04:46,907 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-18 21:04:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:46,909 INFO L225 Difference]: With dead ends: 271 [2020-08-18 21:04:46,909 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 21:04:46,910 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 [2020-08-18 21:04:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 21:04:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-18 21:04:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 21:04:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-18 21:04:46,951 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-18 21:04:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:46,951 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-18 21:04:46,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:04:46,951 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-18 21:04:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 21:04:46,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:46,954 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] [2020-08-18 21:04:46,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-18 21:04:46,954 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-18 21:04:46,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:46,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681779578] [2020-08-18 21:04:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 21:04:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 21:04:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 21:04:47,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681779578] [2020-08-18 21:04:47,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:47,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:04:47,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310502223] [2020-08-18 21:04:47,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 21:04:47,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:47,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 21:04:47,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 21:04:47,297 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-18 21:04:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:47,555 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-18 21:04:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:47,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-18 21:04:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:47,558 INFO L225 Difference]: With dead ends: 284 [2020-08-18 21:04:47,558 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 21:04:47,559 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 [2020-08-18 21:04:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 21:04:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-18 21:04:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-18 21:04:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-18 21:04:47,587 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-18 21:04:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:47,588 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-18 21:04:47,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 21:04:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-18 21:04:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 21:04:47,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:47,590 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] [2020-08-18 21:04:47,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-18 21:04:47,590 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-18 21:04:47,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:47,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058908621] [2020-08-18 21:04:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 21:04:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 21:04:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 21:04:47,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058908621] [2020-08-18 21:04:47,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:04:47,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 21:04:47,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027152382] [2020-08-18 21:04:47,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 21:04:47,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:47,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 21:04:47,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 21:04:47,766 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-18 21:04:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:47,873 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-18 21:04:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:04:47,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-18 21:04:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:47,875 INFO L225 Difference]: With dead ends: 303 [2020-08-18 21:04:47,876 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 21:04:47,877 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 [2020-08-18 21:04:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 21:04:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-18 21:04:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-18 21:04:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-18 21:04:47,907 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-18 21:04:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:47,907 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-18 21:04:47,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 21:04:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-18 21:04:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 21:04:47,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:47,910 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] [2020-08-18 21:04:47,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-18 21:04:47,910 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-18 21:04:47,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:47,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18039424] [2020-08-18 21:04:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:47,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 21:04:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 21:04:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 21:04:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 21:04:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 21:04:48,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18039424] [2020-08-18 21:04:48,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:48,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:04:48,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245313583] [2020-08-18 21:04:48,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:04:48,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:48,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:04:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:04:48,040 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-18 21:04:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:48,128 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-18 21:04:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:04:48,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-18 21:04:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:48,130 INFO L225 Difference]: With dead ends: 409 [2020-08-18 21:04:48,130 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 21:04:48,132 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 [2020-08-18 21:04:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 21:04:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-18 21:04:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 21:04:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-18 21:04:48,153 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-18 21:04:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:48,153 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-18 21:04:48,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:04:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-18 21:04:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 21:04:48,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:48,155 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] [2020-08-18 21:04:48,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-18 21:04:48,156 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:48,156 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-18 21:04:48,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:48,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788904509] [2020-08-18 21:04:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 21:04:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 21:04:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-18 21:04:48,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788904509] [2020-08-18 21:04:48,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:48,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 21:04:48,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617921947] [2020-08-18 21:04:48,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 21:04:48,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:48,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 21:04:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:04:48,328 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-18 21:04:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:48,452 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-18 21:04:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 21:04:48,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-18 21:04:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:48,454 INFO L225 Difference]: With dead ends: 173 [2020-08-18 21:04:48,454 INFO L226 Difference]: Without dead ends: 163 [2020-08-18 21:04:48,454 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 [2020-08-18 21:04:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-18 21:04:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-18 21:04:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 21:04:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-18 21:04:48,471 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-18 21:04:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:48,471 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-18 21:04:48,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 21:04:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-18 21:04:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 21:04:48,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:48,473 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] [2020-08-18 21:04:48,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-18 21:04:48,473 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:48,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:48,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-18 21:04:48,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:48,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010984008] [2020-08-18 21:04:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 21:04:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 21:04:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-18 21:04:48,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010984008] [2020-08-18 21:04:48,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:48,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:04:48,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511022922] [2020-08-18 21:04:48,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:04:48,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:48,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:04:48,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:04:48,735 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-18 21:04:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:48,985 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-18 21:04:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 21:04:48,986 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-18 21:04:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:48,987 INFO L225 Difference]: With dead ends: 175 [2020-08-18 21:04:48,988 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 21:04:48,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-18 21:04:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 21:04:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-18 21:04:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 21:04:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-18 21:04:49,006 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-18 21:04:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:49,007 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-18 21:04:49,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:04:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-18 21:04:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 21:04:49,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:49,008 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:04:49,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-18 21:04:49,008 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-18 21:04:49,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:49,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711112694] [2020-08-18 21:04:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 21:04:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:04:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-18 21:04:49,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711112694] [2020-08-18 21:04:49,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:04:49,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 21:04:49,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993738761] [2020-08-18 21:04:49,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:04:49,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:04:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:04:49,313 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-18 21:04:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:49,509 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-18 21:04:49,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:49,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-18 21:04:49,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:49,511 INFO L225 Difference]: With dead ends: 184 [2020-08-18 21:04:49,511 INFO L226 Difference]: Without dead ends: 174 [2020-08-18 21:04:49,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:04:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-18 21:04:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-18 21:04:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 21:04:49,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-18 21:04:49,532 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-18 21:04:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:49,533 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-18 21:04:49,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:04:49,533 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-18 21:04:49,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 21:04:49,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:49,535 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:04:49,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-18 21:04:49,535 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:49,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-18 21:04:49,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:49,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952395956] [2020-08-18 21:04:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 21:04:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:04:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 21:04:49,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952395956] [2020-08-18 21:04:49,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:49,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 21:04:49,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531959162] [2020-08-18 21:04:49,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 21:04:49,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 21:04:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:04:49,819 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-18 21:04:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:50,016 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-18 21:04:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:50,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-18 21:04:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:50,019 INFO L225 Difference]: With dead ends: 194 [2020-08-18 21:04:50,019 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 21:04:50,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:04:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 21:04:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-18 21:04:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 21:04:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-18 21:04:50,046 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-18 21:04:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:50,047 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-18 21:04:50,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 21:04:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-18 21:04:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 21:04:50,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:50,048 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] [2020-08-18 21:04:50,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-18 21:04:50,049 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-18 21:04:50,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:50,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449020414] [2020-08-18 21:04:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 21:04:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:04:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-18 21:04:50,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449020414] [2020-08-18 21:04:50,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:50,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:04:50,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294645729] [2020-08-18 21:04:50,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:04:50,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:04:50,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:04:50,307 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-18 21:04:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:50,484 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-18 21:04:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:50,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-18 21:04:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:50,486 INFO L225 Difference]: With dead ends: 160 [2020-08-18 21:04:50,487 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 21:04:50,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:04:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 21:04:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-18 21:04:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 21:04:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-18 21:04:50,506 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-18 21:04:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:50,507 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-18 21:04:50,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:04:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-18 21:04:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 21:04:50,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:50,508 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] [2020-08-18 21:04:50,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-18 21:04:50,509 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-18 21:04:50,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:50,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702138162] [2020-08-18 21:04:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 21:04:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:04:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 21:04:50,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702138162] [2020-08-18 21:04:50,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:50,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 21:04:50,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289023647] [2020-08-18 21:04:50,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:04:50,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:50,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:04:50,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:04:50,896 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-18 21:04:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:51,173 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-18 21:04:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 21:04:51,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-18 21:04:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:51,176 INFO L225 Difference]: With dead ends: 155 [2020-08-18 21:04:51,176 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 21:04:51,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-18 21:04:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 21:04:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-18 21:04:51,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 21:04:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-18 21:04:51,191 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-18 21:04:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:51,192 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-18 21:04:51,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:04:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-18 21:04:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 21:04:51,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:04:51,193 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:04:51,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-18 21:04:51,194 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:04:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:04:51,194 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-18 21:04:51,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:04:51,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537693035] [2020-08-18 21:04:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:04:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:51,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:04:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:51,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 21:04:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:51,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 21:04:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:51,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 21:04:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:51,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 21:04:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 21:04:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:04:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-18 21:04:51,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537693035] [2020-08-18 21:04:51,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:04:51,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 21:04:51,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973938469] [2020-08-18 21:04:51,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 21:04:51,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:04:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 21:04:51,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 21:04:51,466 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-18 21:04:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:04:51,638 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-18 21:04:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 21:04:51,639 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-18 21:04:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:04:51,639 INFO L225 Difference]: With dead ends: 137 [2020-08-18 21:04:51,640 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:04:51,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-18 21:04:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:04:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:04:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:04:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:04:51,642 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-18 21:04:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:04:51,642 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:04:51,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 21:04:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:04:51,642 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:04:51,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-18 21:04:51,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:04:52,330 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136 [2020-08-18 21:04:57,664 WARN L193 SmtUtils]: Spent 5.32 s on a formula simplification. DAG size of input: 558 DAG size of output: 226