/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 21:51:01,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 21:51:01,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 21:51:02,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 21:51:02,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 21:51:02,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 21:51:02,003 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 21:51:02,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 21:51:02,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 21:51:02,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 21:51:02,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 21:51:02,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 21:51:02,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 21:51:02,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 21:51:02,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 21:51:02,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 21:51:02,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 21:51:02,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 21:51:02,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 21:51:02,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 21:51:02,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 21:51:02,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 21:51:02,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 21:51:02,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 21:51:02,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 21:51:02,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 21:51:02,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 21:51:02,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 21:51:02,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 21:51:02,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 21:51:02,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 21:51:02,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 21:51:02,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 21:51:02,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 21:51:02,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 21:51:02,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 21:51:02,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 21:51:02,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 21:51:02,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 21:51:02,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 21:51:02,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 21:51:02,046 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 21:51:02,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 21:51:02,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 21:51:02,047 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 21:51:02,047 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 21:51:02,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 21:51:02,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 21:51:02,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 21:51:02,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 21:51:02,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 21:51:02,048 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 21:51:02,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 21:51:02,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 21:51:02,407 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 21:51:02,409 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 21:51:02,409 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 21:51:02,410 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 21:51:02,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d58107cfb/75de08d14e4b4480ae9baa7108cc1f07/FLAG9e3eaad77 [2020-08-22 21:51:02,932 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 21:51:02,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 21:51:02,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d58107cfb/75de08d14e4b4480ae9baa7108cc1f07/FLAG9e3eaad77 [2020-08-22 21:51:03,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d58107cfb/75de08d14e4b4480ae9baa7108cc1f07 [2020-08-22 21:51:03,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 21:51:03,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 21:51:03,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 21:51:03,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 21:51:03,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 21:51:03,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e9d6c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03, skipping insertion in model container [2020-08-22 21:51:03,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 21:51:03,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 21:51:03,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:51:03,698 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 21:51:03,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 21:51:03,903 INFO L208 MainTranslator]: Completed translation [2020-08-22 21:51:03,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03 WrapperNode [2020-08-22 21:51:03,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 21:51:03,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 21:51:03,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 21:51:03,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 21:51:03,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... [2020-08-22 21:51:03,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 21:51:03,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 21:51:03,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 21:51:03,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 21:51:03,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 21:51:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 21:51:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 21:51:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 21:51:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 21:51:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 21:51:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 21:51:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 21:51:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 21:51:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 21:51:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 21:51:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 21:51:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 21:51:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 21:51:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 21:51:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 21:51:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 21:51:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 21:51:04,535 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 21:51:04,535 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 21:51:04,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:51:04 BoogieIcfgContainer [2020-08-22 21:51:04,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 21:51:04,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 21:51:04,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 21:51:04,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 21:51:04,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 09:51:03" (1/3) ... [2020-08-22 21:51:04,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73360e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:51:04, skipping insertion in model container [2020-08-22 21:51:04,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 09:51:03" (2/3) ... [2020-08-22 21:51:04,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73360e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 09:51:04, skipping insertion in model container [2020-08-22 21:51:04,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 09:51:04" (3/3) ... [2020-08-22 21:51:04,551 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-22 21:51:04,563 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 21:51:04,571 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 21:51:04,585 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 21:51:04,612 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 21:51:04,613 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 21:51:04,615 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 21:51:04,615 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 21:51:04,615 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 21:51:04,615 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 21:51:04,616 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 21:51:04,616 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 21:51:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-08-22 21:51:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 21:51:04,661 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:04,662 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:04,663 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:04,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2062280112, now seen corresponding path program 1 times [2020-08-22 21:51:04,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:04,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994059454] [2020-08-22 21:51:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:04,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 21:51:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 21:51:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 21:51:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:05,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994059454] [2020-08-22 21:51:05,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:05,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 21:51:05,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397013479] [2020-08-22 21:51:05,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:51:05,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:05,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:51:05,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:51:05,114 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-08-22 21:51:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:05,280 INFO L93 Difference]: Finished difference Result 286 states and 363 transitions. [2020-08-22 21:51:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 21:51:05,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-08-22 21:51:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:05,316 INFO L225 Difference]: With dead ends: 286 [2020-08-22 21:51:05,317 INFO L226 Difference]: Without dead ends: 168 [2020-08-22 21:51:05,321 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 [2020-08-22 21:51:05,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-08-22 21:51:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 145. [2020-08-22 21:51:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-08-22 21:51:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2020-08-22 21:51:05,387 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 100 [2020-08-22 21:51:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:05,388 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2020-08-22 21:51:05,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:51:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2020-08-22 21:51:05,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 21:51:05,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:05,394 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:05,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 21:51:05,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1947593625, now seen corresponding path program 1 times [2020-08-22 21:51:05,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:05,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587664421] [2020-08-22 21:51:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 21:51:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 21:51:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 21:51:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:05,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587664421] [2020-08-22 21:51:05,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:05,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 21:51:05,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635471747] [2020-08-22 21:51:05,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:51:05,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:05,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:51:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:51:05,531 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand 4 states. [2020-08-22 21:51:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:05,626 INFO L93 Difference]: Finished difference Result 278 states and 331 transitions. [2020-08-22 21:51:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:51:05,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-08-22 21:51:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:05,630 INFO L225 Difference]: With dead ends: 278 [2020-08-22 21:51:05,630 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 21:51:05,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 21:51:05,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 157. [2020-08-22 21:51:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 21:51:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-08-22 21:51:05,668 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 103 [2020-08-22 21:51:05,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:05,669 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-08-22 21:51:05,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:51:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-08-22 21:51:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 21:51:05,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:05,680 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:05,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 21:51:05,680 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1622356113, now seen corresponding path program 1 times [2020-08-22 21:51:05,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:05,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641849151] [2020-08-22 21:51:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 21:51:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 21:51:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 21:51:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:05,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641849151] [2020-08-22 21:51:05,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:05,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 21:51:05,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891067844] [2020-08-22 21:51:05,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:51:05,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:05,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:51:05,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:05,812 INFO L87 Difference]: Start difference. First operand 157 states and 185 transitions. Second operand 5 states. [2020-08-22 21:51:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:05,917 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 21:51:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 21:51:05,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 21:51:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:05,921 INFO L225 Difference]: With dead ends: 314 [2020-08-22 21:51:05,921 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 21:51:05,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 21:51:05,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2020-08-22 21:51:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 21:51:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2020-08-22 21:51:05,950 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 108 [2020-08-22 21:51:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:05,951 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2020-08-22 21:51:05,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:51:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2020-08-22 21:51:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-08-22 21:51:05,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:05,954 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:05,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 21:51:05,954 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:05,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:05,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1409900093, now seen corresponding path program 1 times [2020-08-22 21:51:05,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:05,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577393141] [2020-08-22 21:51:05,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 21:51:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 21:51:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 21:51:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:06,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577393141] [2020-08-22 21:51:06,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 21:51:06,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642817762] [2020-08-22 21:51:06,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:51:06,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:51:06,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:06,216 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 5 states. [2020-08-22 21:51:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,327 INFO L93 Difference]: Finished difference Result 314 states and 375 transitions. [2020-08-22 21:51:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 21:51:06,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-08-22 21:51:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,330 INFO L225 Difference]: With dead ends: 314 [2020-08-22 21:51:06,331 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 21:51:06,332 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 [2020-08-22 21:51:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 21:51:06,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-08-22 21:51:06,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-22 21:51:06,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2020-08-22 21:51:06,356 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 108 [2020-08-22 21:51:06,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,356 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2020-08-22 21:51:06,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:51:06,356 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2020-08-22 21:51:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 21:51:06,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,359 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:06,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 21:51:06,359 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2129807001, now seen corresponding path program 2 times [2020-08-22 21:51:06,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332949748] [2020-08-22 21:51:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 21:51:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:51:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 21:51:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:06,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332949748] [2020-08-22 21:51:06,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 21:51:06,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287817096] [2020-08-22 21:51:06,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 21:51:06,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 21:51:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:06,482 INFO L87 Difference]: Start difference. First operand 176 states and 207 transitions. Second operand 6 states. [2020-08-22 21:51:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,588 INFO L93 Difference]: Finished difference Result 348 states and 416 transitions. [2020-08-22 21:51:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:51:06,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 21:51:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,591 INFO L225 Difference]: With dead ends: 348 [2020-08-22 21:51:06,591 INFO L226 Difference]: Without dead ends: 218 [2020-08-22 21:51:06,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:51:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-22 21:51:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2020-08-22 21:51:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 21:51:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 21:51:06,614 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 21:51:06,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,614 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 21:51:06,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 21:51:06,614 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 21:51:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 21:51:06,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:06,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 21:51:06,617 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash -902449205, now seen corresponding path program 1 times [2020-08-22 21:51:06,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815100872] [2020-08-22 21:51:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 21:51:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 21:51:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 21:51:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:06,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815100872] [2020-08-22 21:51:06,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:06,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 21:51:06,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294855547] [2020-08-22 21:51:06,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 21:51:06,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 21:51:06,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:06,766 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 6 states. [2020-08-22 21:51:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:06,917 INFO L93 Difference]: Finished difference Result 342 states and 410 transitions. [2020-08-22 21:51:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 21:51:06,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2020-08-22 21:51:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:06,920 INFO L225 Difference]: With dead ends: 342 [2020-08-22 21:51:06,920 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 21:51:06,922 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 [2020-08-22 21:51:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 21:51:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 186. [2020-08-22 21:51:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 21:51:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2020-08-22 21:51:06,948 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 113 [2020-08-22 21:51:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:06,951 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2020-08-22 21:51:06,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 21:51:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2020-08-22 21:51:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 21:51:06,955 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:06,956 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:06,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 21:51:06,956 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash 139965841, now seen corresponding path program 3 times [2020-08-22 21:51:06,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:06,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980124120] [2020-08-22 21:51:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 21:51:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 21:51:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 21:51:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:07,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980124120] [2020-08-22 21:51:07,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:07,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 21:51:07,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724211611] [2020-08-22 21:51:07,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:51:07,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:07,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:51:07,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:51:07,122 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand 7 states. [2020-08-22 21:51:07,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:07,257 INFO L93 Difference]: Finished difference Result 375 states and 449 transitions. [2020-08-22 21:51:07,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 21:51:07,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 21:51:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:07,263 INFO L225 Difference]: With dead ends: 375 [2020-08-22 21:51:07,264 INFO L226 Difference]: Without dead ends: 240 [2020-08-22 21:51:07,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-08-22 21:51:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 196. [2020-08-22 21:51:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 21:51:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 21:51:07,299 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 21:51:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:07,300 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 21:51:07,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:51:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 21:51:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 21:51:07,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:07,304 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:07,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 21:51:07,304 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1402676931, now seen corresponding path program 2 times [2020-08-22 21:51:07,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:07,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385184395] [2020-08-22 21:51:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 21:51:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 21:51:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 21:51:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:07,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385184395] [2020-08-22 21:51:07,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:07,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 21:51:07,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947364057] [2020-08-22 21:51:07,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 21:51:07,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:07,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 21:51:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 21:51:07,515 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 7 states. [2020-08-22 21:51:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:07,651 INFO L93 Difference]: Finished difference Result 361 states and 435 transitions. [2020-08-22 21:51:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 21:51:07,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-08-22 21:51:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:07,654 INFO L225 Difference]: With dead ends: 361 [2020-08-22 21:51:07,654 INFO L226 Difference]: Without dead ends: 228 [2020-08-22 21:51:07,655 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 [2020-08-22 21:51:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-08-22 21:51:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-08-22 21:51:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-08-22 21:51:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 233 transitions. [2020-08-22 21:51:07,675 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 233 transitions. Word has length 118 [2020-08-22 21:51:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:07,676 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 233 transitions. [2020-08-22 21:51:07,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 21:51:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 233 transitions. [2020-08-22 21:51:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 21:51:07,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:07,678 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:07,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 21:51:07,678 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash -229056103, now seen corresponding path program 4 times [2020-08-22 21:51:07,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:07,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461940709] [2020-08-22 21:51:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 21:51:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:51:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 21:51:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:07,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461940709] [2020-08-22 21:51:07,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:07,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 21:51:07,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196287589] [2020-08-22 21:51:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:51:07,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:51:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:07,814 INFO L87 Difference]: Start difference. First operand 196 states and 233 transitions. Second operand 8 states. [2020-08-22 21:51:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:07,963 INFO L93 Difference]: Finished difference Result 402 states and 482 transitions. [2020-08-22 21:51:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 21:51:07,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 21:51:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:07,966 INFO L225 Difference]: With dead ends: 402 [2020-08-22 21:51:07,966 INFO L226 Difference]: Without dead ends: 262 [2020-08-22 21:51:07,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-22 21:51:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 206. [2020-08-22 21:51:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 21:51:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 21:51:07,992 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 21:51:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:07,992 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 21:51:07,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:51:07,993 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 21:51:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 21:51:07,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:07,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:07,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 21:51:07,995 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:07,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1033654987, now seen corresponding path program 3 times [2020-08-22 21:51:07,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:07,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619912468] [2020-08-22 21:51:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 21:51:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 21:51:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 21:51:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:08,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619912468] [2020-08-22 21:51:08,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:08,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 21:51:08,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784145996] [2020-08-22 21:51:08,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:51:08,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:08,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:51:08,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:08,192 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 8 states. [2020-08-22 21:51:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:08,351 INFO L93 Difference]: Finished difference Result 380 states and 460 transitions. [2020-08-22 21:51:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 21:51:08,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 123 [2020-08-22 21:51:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:08,354 INFO L225 Difference]: With dead ends: 380 [2020-08-22 21:51:08,354 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 21:51:08,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 21:51:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2020-08-22 21:51:08,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-08-22 21:51:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 246 transitions. [2020-08-22 21:51:08,380 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 246 transitions. Word has length 123 [2020-08-22 21:51:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:08,380 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 246 transitions. [2020-08-22 21:51:08,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:51:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 246 transitions. [2020-08-22 21:51:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 21:51:08,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:08,383 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:08,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 21:51:08,383 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:08,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1138358929, now seen corresponding path program 5 times [2020-08-22 21:51:08,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:08,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109926384] [2020-08-22 21:51:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 21:51:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 21:51:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 21:51:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 72 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:08,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109926384] [2020-08-22 21:51:08,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:08,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 21:51:08,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484444579] [2020-08-22 21:51:08,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 21:51:08,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:08,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 21:51:08,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:08,517 INFO L87 Difference]: Start difference. First operand 206 states and 246 transitions. Second operand 9 states. [2020-08-22 21:51:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:08,697 INFO L93 Difference]: Finished difference Result 429 states and 515 transitions. [2020-08-22 21:51:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 21:51:08,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 21:51:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:08,700 INFO L225 Difference]: With dead ends: 429 [2020-08-22 21:51:08,701 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 21:51:08,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 21:51:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2020-08-22 21:51:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 21:51:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 21:51:08,726 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 21:51:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:08,727 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 21:51:08,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 21:51:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 21:51:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 21:51:08,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:08,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:08,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 21:51:08,730 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:08,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1893897277, now seen corresponding path program 4 times [2020-08-22 21:51:08,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:08,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286138347] [2020-08-22 21:51:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 21:51:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 21:51:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 21:51:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:08,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286138347] [2020-08-22 21:51:08,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:08,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 21:51:08,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423158754] [2020-08-22 21:51:08,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 21:51:08,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:08,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 21:51:08,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:08,900 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 9 states. [2020-08-22 21:51:09,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:09,081 INFO L93 Difference]: Finished difference Result 399 states and 485 transitions. [2020-08-22 21:51:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 21:51:09,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2020-08-22 21:51:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:09,084 INFO L225 Difference]: With dead ends: 399 [2020-08-22 21:51:09,084 INFO L226 Difference]: Without dead ends: 256 [2020-08-22 21:51:09,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-08-22 21:51:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 216. [2020-08-22 21:51:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 21:51:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 259 transitions. [2020-08-22 21:51:09,108 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 259 transitions. Word has length 128 [2020-08-22 21:51:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:09,108 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 259 transitions. [2020-08-22 21:51:09,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 21:51:09,108 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 259 transitions. [2020-08-22 21:51:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 21:51:09,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:09,110 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:09,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 21:51:09,111 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1450818713, now seen corresponding path program 6 times [2020-08-22 21:51:09,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:09,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746276391] [2020-08-22 21:51:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 21:51:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:51:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 21:51:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:09,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746276391] [2020-08-22 21:51:09,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:09,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:09,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914144620] [2020-08-22 21:51:09,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:09,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:09,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:09,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:09,304 INFO L87 Difference]: Start difference. First operand 216 states and 259 transitions. Second operand 10 states. [2020-08-22 21:51:09,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:09,518 INFO L93 Difference]: Finished difference Result 456 states and 548 transitions. [2020-08-22 21:51:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 21:51:09,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 21:51:09,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:09,521 INFO L225 Difference]: With dead ends: 456 [2020-08-22 21:51:09,521 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 21:51:09,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 21:51:09,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 226. [2020-08-22 21:51:09,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 21:51:09,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 21:51:09,545 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 21:51:09,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:09,545 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 21:51:09,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 21:51:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 21:51:09,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:09,548 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:09,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 21:51:09,548 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1581437493, now seen corresponding path program 5 times [2020-08-22 21:51:09,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:09,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089285542] [2020-08-22 21:51:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 21:51:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 21:51:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 21:51:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 7 proven. 89 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:09,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089285542] [2020-08-22 21:51:09,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:09,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:09,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640614511] [2020-08-22 21:51:09,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:09,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:09,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:09,748 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 10 states. [2020-08-22 21:51:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:09,966 INFO L93 Difference]: Finished difference Result 418 states and 510 transitions. [2020-08-22 21:51:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 21:51:09,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-08-22 21:51:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:09,969 INFO L225 Difference]: With dead ends: 418 [2020-08-22 21:51:09,969 INFO L226 Difference]: Without dead ends: 270 [2020-08-22 21:51:09,971 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 [2020-08-22 21:51:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-08-22 21:51:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 226. [2020-08-22 21:51:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 21:51:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 272 transitions. [2020-08-22 21:51:10,001 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 272 transitions. Word has length 133 [2020-08-22 21:51:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:10,001 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 272 transitions. [2020-08-22 21:51:10,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 272 transitions. [2020-08-22 21:51:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 21:51:10,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:10,005 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:10,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 21:51:10,006 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:10,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash 688521105, now seen corresponding path program 7 times [2020-08-22 21:51:10,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:10,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373815704] [2020-08-22 21:51:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 21:51:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 21:51:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 21:51:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 6 proven. 131 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:10,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373815704] [2020-08-22 21:51:10,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:10,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 21:51:10,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598570200] [2020-08-22 21:51:10,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 21:51:10,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 21:51:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:10,208 INFO L87 Difference]: Start difference. First operand 226 states and 272 transitions. Second operand 11 states. [2020-08-22 21:51:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:10,359 INFO L93 Difference]: Finished difference Result 483 states and 581 transitions. [2020-08-22 21:51:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:10,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 21:51:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:10,362 INFO L225 Difference]: With dead ends: 483 [2020-08-22 21:51:10,363 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 21:51:10,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 21:51:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 236. [2020-08-22 21:51:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 21:51:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 21:51:10,393 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 21:51:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:10,393 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 21:51:10,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 21:51:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 21:51:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-08-22 21:51:10,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:10,396 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:10,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 21:51:10,396 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1951232195, now seen corresponding path program 6 times [2020-08-22 21:51:10,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:10,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811255654] [2020-08-22 21:51:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 21:51:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 21:51:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 21:51:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 7 proven. 119 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:10,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811255654] [2020-08-22 21:51:10,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:10,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 21:51:10,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048578859] [2020-08-22 21:51:10,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 21:51:10,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 21:51:10,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:10,669 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 11 states. [2020-08-22 21:51:10,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:10,950 INFO L93 Difference]: Finished difference Result 437 states and 535 transitions. [2020-08-22 21:51:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:10,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 138 [2020-08-22 21:51:10,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:10,953 INFO L225 Difference]: With dead ends: 437 [2020-08-22 21:51:10,953 INFO L226 Difference]: Without dead ends: 284 [2020-08-22 21:51:10,954 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 [2020-08-22 21:51:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-08-22 21:51:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 236. [2020-08-22 21:51:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-22 21:51:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 285 transitions. [2020-08-22 21:51:10,977 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 285 transitions. Word has length 138 [2020-08-22 21:51:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:10,978 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 285 transitions. [2020-08-22 21:51:10,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 21:51:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 285 transitions. [2020-08-22 21:51:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 21:51:10,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:10,980 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:10,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 21:51:10,981 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1216030823, now seen corresponding path program 8 times [2020-08-22 21:51:10,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:10,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634703268] [2020-08-22 21:51:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 21:51:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:51:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 21:51:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:11,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634703268] [2020-08-22 21:51:11,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:11,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 21:51:11,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830930919] [2020-08-22 21:51:11,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 21:51:11,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 21:51:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:11,198 INFO L87 Difference]: Start difference. First operand 236 states and 285 transitions. Second operand 12 states. [2020-08-22 21:51:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:11,478 INFO L93 Difference]: Finished difference Result 510 states and 614 transitions. [2020-08-22 21:51:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 21:51:11,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 21:51:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:11,482 INFO L225 Difference]: With dead ends: 510 [2020-08-22 21:51:11,483 INFO L226 Difference]: Without dead ends: 350 [2020-08-22 21:51:11,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-22 21:51:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 246. [2020-08-22 21:51:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 21:51:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 21:51:11,521 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 21:51:11,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:11,521 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 21:51:11,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 21:51:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 21:51:11,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 21:51:11,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:11,524 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:11,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 21:51:11,524 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash 46680267, now seen corresponding path program 7 times [2020-08-22 21:51:11,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:11,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860258731] [2020-08-22 21:51:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 21:51:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-08-22 21:51:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-22 21:51:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 154 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:11,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860258731] [2020-08-22 21:51:11,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:11,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 21:51:11,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841724232] [2020-08-22 21:51:11,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 21:51:11,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:11,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 21:51:11,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:11,927 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 12 states. [2020-08-22 21:51:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:12,277 INFO L93 Difference]: Finished difference Result 456 states and 560 transitions. [2020-08-22 21:51:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 21:51:12,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 143 [2020-08-22 21:51:12,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:12,280 INFO L225 Difference]: With dead ends: 456 [2020-08-22 21:51:12,280 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 21:51:12,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 21:51:12,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2020-08-22 21:51:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-08-22 21:51:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 298 transitions. [2020-08-22 21:51:12,304 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 298 transitions. Word has length 143 [2020-08-22 21:51:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:12,304 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 298 transitions. [2020-08-22 21:51:12,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 21:51:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 298 transitions. [2020-08-22 21:51:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 21:51:12,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:12,307 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:12,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 21:51:12,307 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:12,308 INFO L82 PathProgramCache]: Analyzing trace with hash -910703471, now seen corresponding path program 9 times [2020-08-22 21:51:12,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:12,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234692303] [2020-08-22 21:51:12,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 21:51:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 21:51:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 21:51:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 6 proven. 210 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:12,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234692303] [2020-08-22 21:51:12,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:12,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 21:51:12,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836105975] [2020-08-22 21:51:12,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 21:51:12,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:12,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 21:51:12,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:12,514 INFO L87 Difference]: Start difference. First operand 246 states and 298 transitions. Second operand 13 states. [2020-08-22 21:51:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:12,758 INFO L93 Difference]: Finished difference Result 537 states and 647 transitions. [2020-08-22 21:51:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 21:51:12,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 21:51:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:12,761 INFO L225 Difference]: With dead ends: 537 [2020-08-22 21:51:12,761 INFO L226 Difference]: Without dead ends: 372 [2020-08-22 21:51:12,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-08-22 21:51:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 256. [2020-08-22 21:51:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 21:51:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 21:51:12,789 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 21:51:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:12,789 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 21:51:12,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 21:51:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 21:51:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 21:51:12,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:12,792 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:12,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 21:51:12,792 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash 352007619, now seen corresponding path program 8 times [2020-08-22 21:51:12,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:12,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208670416] [2020-08-22 21:51:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 21:51:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 21:51:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 21:51:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 7 proven. 194 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208670416] [2020-08-22 21:51:13,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:13,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 21:51:13,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117694182] [2020-08-22 21:51:13,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 21:51:13,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 21:51:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:13,069 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 13 states. [2020-08-22 21:51:13,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:13,398 INFO L93 Difference]: Finished difference Result 475 states and 585 transitions. [2020-08-22 21:51:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 21:51:13,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 148 [2020-08-22 21:51:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:13,401 INFO L225 Difference]: With dead ends: 475 [2020-08-22 21:51:13,401 INFO L226 Difference]: Without dead ends: 312 [2020-08-22 21:51:13,402 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 [2020-08-22 21:51:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-08-22 21:51:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 256. [2020-08-22 21:51:13,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-22 21:51:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2020-08-22 21:51:13,425 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 148 [2020-08-22 21:51:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:13,426 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2020-08-22 21:51:13,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 21:51:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2020-08-22 21:51:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 21:51:13,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:13,428 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:13,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 21:51:13,428 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:13,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1515572583, now seen corresponding path program 10 times [2020-08-22 21:51:13,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:13,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911797753] [2020-08-22 21:51:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 21:51:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 21:51:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 21:51:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 6 proven. 257 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:13,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911797753] [2020-08-22 21:51:13,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:13,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 21:51:13,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605479850] [2020-08-22 21:51:13,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 21:51:13,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 21:51:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:13,684 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 14 states. [2020-08-22 21:51:13,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:13,867 INFO L93 Difference]: Finished difference Result 564 states and 680 transitions. [2020-08-22 21:51:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 21:51:13,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 21:51:13,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:13,871 INFO L225 Difference]: With dead ends: 564 [2020-08-22 21:51:13,871 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 21:51:13,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 21:51:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 266. [2020-08-22 21:51:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 21:51:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 21:51:13,898 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 21:51:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:13,898 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 21:51:13,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 21:51:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 21:51:13,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-08-22 21:51:13,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:13,901 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:13,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 21:51:13,901 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash -252861493, now seen corresponding path program 9 times [2020-08-22 21:51:13,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:13,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851132327] [2020-08-22 21:51:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:13,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 21:51:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-08-22 21:51:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-08-22 21:51:14,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 7 proven. 239 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:14,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851132327] [2020-08-22 21:51:14,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:14,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 21:51:14,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195237942] [2020-08-22 21:51:14,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 21:51:14,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 21:51:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 21:51:14,252 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 14 states. [2020-08-22 21:51:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:14,708 INFO L93 Difference]: Finished difference Result 494 states and 610 transitions. [2020-08-22 21:51:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 21:51:14,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 153 [2020-08-22 21:51:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:14,712 INFO L225 Difference]: With dead ends: 494 [2020-08-22 21:51:14,712 INFO L226 Difference]: Without dead ends: 326 [2020-08-22 21:51:14,715 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 [2020-08-22 21:51:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-22 21:51:14,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 266. [2020-08-22 21:51:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 21:51:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 324 transitions. [2020-08-22 21:51:14,745 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 324 transitions. Word has length 153 [2020-08-22 21:51:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:14,745 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 324 transitions. [2020-08-22 21:51:14,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 21:51:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 324 transitions. [2020-08-22 21:51:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 21:51:14,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:14,748 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:14,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 21:51:14,748 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:14,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:14,749 INFO L82 PathProgramCache]: Analyzing trace with hash 867387793, now seen corresponding path program 11 times [2020-08-22 21:51:14,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:14,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181641796] [2020-08-22 21:51:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 21:51:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 21:51:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:14,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 21:51:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 6 proven. 309 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:15,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181641796] [2020-08-22 21:51:15,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:15,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 21:51:15,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122208214] [2020-08-22 21:51:15,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 21:51:15,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:15,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 21:51:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:15,049 INFO L87 Difference]: Start difference. First operand 266 states and 324 transitions. Second operand 15 states. [2020-08-22 21:51:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:15,324 INFO L93 Difference]: Finished difference Result 591 states and 713 transitions. [2020-08-22 21:51:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 21:51:15,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 21:51:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:15,327 INFO L225 Difference]: With dead ends: 591 [2020-08-22 21:51:15,327 INFO L226 Difference]: Without dead ends: 416 [2020-08-22 21:51:15,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-22 21:51:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 276. [2020-08-22 21:51:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 21:51:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 21:51:15,361 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 21:51:15,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:15,361 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 21:51:15,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 21:51:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 21:51:15,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 21:51:15,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:15,364 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:15,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 21:51:15,364 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:15,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2130098883, now seen corresponding path program 10 times [2020-08-22 21:51:15,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:15,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964193544] [2020-08-22 21:51:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 21:51:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 21:51:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 21:51:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 7 proven. 289 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:15,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964193544] [2020-08-22 21:51:15,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:15,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 21:51:15,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278185993] [2020-08-22 21:51:15,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 21:51:15,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 21:51:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:15,757 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 15 states. [2020-08-22 21:51:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:16,223 INFO L93 Difference]: Finished difference Result 513 states and 635 transitions. [2020-08-22 21:51:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 21:51:16,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 158 [2020-08-22 21:51:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:16,226 INFO L225 Difference]: With dead ends: 513 [2020-08-22 21:51:16,226 INFO L226 Difference]: Without dead ends: 340 [2020-08-22 21:51:16,227 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 [2020-08-22 21:51:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-08-22 21:51:16,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 276. [2020-08-22 21:51:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 21:51:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2020-08-22 21:51:16,259 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 158 [2020-08-22 21:51:16,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:16,259 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2020-08-22 21:51:16,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 21:51:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2020-08-22 21:51:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 21:51:16,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:16,262 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:16,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 21:51:16,264 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:16,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash 890883481, now seen corresponding path program 12 times [2020-08-22 21:51:16,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:16,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999895370] [2020-08-22 21:51:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 21:51:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 21:51:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 21:51:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 6 proven. 366 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:16,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999895370] [2020-08-22 21:51:16,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:16,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 21:51:16,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577197045] [2020-08-22 21:51:16,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 21:51:16,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:16,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 21:51:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:16,540 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand 16 states. [2020-08-22 21:51:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:16,863 INFO L93 Difference]: Finished difference Result 618 states and 746 transitions. [2020-08-22 21:51:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 21:51:16,863 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 21:51:16,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:16,867 INFO L225 Difference]: With dead ends: 618 [2020-08-22 21:51:16,867 INFO L226 Difference]: Without dead ends: 438 [2020-08-22 21:51:16,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-08-22 21:51:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2020-08-22 21:51:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 21:51:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 21:51:16,911 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 21:51:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:16,911 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 21:51:16,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 21:51:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 21:51:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 21:51:16,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:16,916 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:16,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 21:51:16,916 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2141372725, now seen corresponding path program 11 times [2020-08-22 21:51:16,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:16,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686962261] [2020-08-22 21:51:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:16,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-08-22 21:51:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-08-22 21:51:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-08-22 21:51:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 7 proven. 344 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:17,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686962261] [2020-08-22 21:51:17,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:17,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 21:51:17,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736101716] [2020-08-22 21:51:17,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 21:51:17,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 21:51:17,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:17,409 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 16 states. [2020-08-22 21:51:17,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:17,917 INFO L93 Difference]: Finished difference Result 532 states and 660 transitions. [2020-08-22 21:51:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 21:51:17,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 163 [2020-08-22 21:51:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:17,920 INFO L225 Difference]: With dead ends: 532 [2020-08-22 21:51:17,920 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 21:51:17,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 21:51:17,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 286. [2020-08-22 21:51:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 21:51:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 350 transitions. [2020-08-22 21:51:17,949 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 350 transitions. Word has length 163 [2020-08-22 21:51:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:17,949 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 350 transitions. [2020-08-22 21:51:17,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 21:51:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 350 transitions. [2020-08-22 21:51:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 21:51:17,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:17,952 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:17,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 21:51:17,952 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:17,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:17,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1892454033, now seen corresponding path program 13 times [2020-08-22 21:51:17,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:17,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876194249] [2020-08-22 21:51:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:17,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 21:51:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 21:51:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 21:51:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 6 proven. 428 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:18,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876194249] [2020-08-22 21:51:18,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:18,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 21:51:18,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774062789] [2020-08-22 21:51:18,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 21:51:18,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 21:51:18,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:18,247 INFO L87 Difference]: Start difference. First operand 286 states and 350 transitions. Second operand 17 states. [2020-08-22 21:51:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:18,558 INFO L93 Difference]: Finished difference Result 645 states and 779 transitions. [2020-08-22 21:51:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 21:51:18,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 21:51:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:18,561 INFO L225 Difference]: With dead ends: 645 [2020-08-22 21:51:18,562 INFO L226 Difference]: Without dead ends: 460 [2020-08-22 21:51:18,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-08-22 21:51:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 296. [2020-08-22 21:51:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 21:51:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 21:51:18,599 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 21:51:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:18,599 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 21:51:18,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 21:51:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 21:51:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 21:51:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:18,602 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:18,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 21:51:18,602 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1139802173, now seen corresponding path program 12 times [2020-08-22 21:51:18,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:18,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615205525] [2020-08-22 21:51:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 21:51:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 21:51:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:18,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 21:51:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 7 proven. 404 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:19,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615205525] [2020-08-22 21:51:19,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:19,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 21:51:19,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817533320] [2020-08-22 21:51:19,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 21:51:19,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 21:51:19,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:19,035 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 17 states. [2020-08-22 21:51:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:19,579 INFO L93 Difference]: Finished difference Result 551 states and 685 transitions. [2020-08-22 21:51:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 21:51:19,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 168 [2020-08-22 21:51:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:19,583 INFO L225 Difference]: With dead ends: 551 [2020-08-22 21:51:19,584 INFO L226 Difference]: Without dead ends: 368 [2020-08-22 21:51:19,585 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 [2020-08-22 21:51:19,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-22 21:51:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2020-08-22 21:51:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 21:51:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 363 transitions. [2020-08-22 21:51:19,625 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 363 transitions. Word has length 168 [2020-08-22 21:51:19,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:19,626 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 363 transitions. [2020-08-22 21:51:19,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 21:51:19,626 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 363 transitions. [2020-08-22 21:51:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 21:51:19,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:19,629 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:19,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 21:51:19,629 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash -33314663, now seen corresponding path program 14 times [2020-08-22 21:51:19,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:19,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462751830] [2020-08-22 21:51:19,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 21:51:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 21:51:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 21:51:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 6 proven. 495 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:19,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462751830] [2020-08-22 21:51:19,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:19,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 21:51:19,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663588588] [2020-08-22 21:51:19,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 21:51:19,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:19,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 21:51:19,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:19,959 INFO L87 Difference]: Start difference. First operand 296 states and 363 transitions. Second operand 18 states. [2020-08-22 21:51:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:20,284 INFO L93 Difference]: Finished difference Result 672 states and 812 transitions. [2020-08-22 21:51:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 21:51:20,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 21:51:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:20,288 INFO L225 Difference]: With dead ends: 672 [2020-08-22 21:51:20,289 INFO L226 Difference]: Without dead ends: 482 [2020-08-22 21:51:20,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-08-22 21:51:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 306. [2020-08-22 21:51:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 21:51:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 21:51:20,322 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 21:51:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:20,323 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 21:51:20,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 21:51:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 21:51:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-08-22 21:51:20,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:20,326 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:20,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 21:51:20,326 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1229396427, now seen corresponding path program 13 times [2020-08-22 21:51:20,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:20,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405480548] [2020-08-22 21:51:20,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:20,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2020-08-22 21:51:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2020-08-22 21:51:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-08-22 21:51:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 7 proven. 469 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:20,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405480548] [2020-08-22 21:51:20,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:20,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 21:51:20,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428383171] [2020-08-22 21:51:20,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 21:51:20,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:20,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 21:51:20,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:20,746 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 18 states. [2020-08-22 21:51:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:21,397 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-08-22 21:51:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 21:51:21,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 173 [2020-08-22 21:51:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:21,400 INFO L225 Difference]: With dead ends: 570 [2020-08-22 21:51:21,401 INFO L226 Difference]: Without dead ends: 382 [2020-08-22 21:51:21,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-08-22 21:51:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 306. [2020-08-22 21:51:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-08-22 21:51:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 376 transitions. [2020-08-22 21:51:21,435 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 376 transitions. Word has length 173 [2020-08-22 21:51:21,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:21,436 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 376 transitions. [2020-08-22 21:51:21,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 21:51:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 376 transitions. [2020-08-22 21:51:21,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-22 21:51:21,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:21,440 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:21,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 21:51:21,441 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2032954479, now seen corresponding path program 15 times [2020-08-22 21:51:21,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:21,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576541010] [2020-08-22 21:51:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 21:51:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-08-22 21:51:21,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576541010] [2020-08-22 21:51:21,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:21,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 21:51:21,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983985894] [2020-08-22 21:51:21,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 21:51:21,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:21,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 21:51:21,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 21:51:21,518 INFO L87 Difference]: Start difference. First operand 306 states and 376 transitions. Second operand 3 states. [2020-08-22 21:51:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:21,551 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-08-22 21:51:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 21:51:21,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2020-08-22 21:51:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:21,554 INFO L225 Difference]: With dead ends: 321 [2020-08-22 21:51:21,554 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 21:51:21,555 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 [2020-08-22 21:51:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 21:51:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2020-08-22 21:51:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-08-22 21:51:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2020-08-22 21:51:21,590 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 178 [2020-08-22 21:51:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:21,590 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2020-08-22 21:51:21,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 21:51:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2020-08-22 21:51:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 21:51:21,593 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:21,593 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:21,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 21:51:21,594 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:21,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:21,594 INFO L82 PathProgramCache]: Analyzing trace with hash 368593816, now seen corresponding path program 1 times [2020-08-22 21:51:21,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:21,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011890130] [2020-08-22 21:51:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 21:51:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2020-08-22 21:51:21,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011890130] [2020-08-22 21:51:21,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:21,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 21:51:21,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439183827] [2020-08-22 21:51:21,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 21:51:21,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 21:51:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 21:51:21,676 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand 4 states. [2020-08-22 21:51:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:21,712 INFO L93 Difference]: Finished difference Result 321 states and 392 transitions. [2020-08-22 21:51:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 21:51:21,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-08-22 21:51:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:21,716 INFO L225 Difference]: With dead ends: 321 [2020-08-22 21:51:21,716 INFO L226 Difference]: Without dead ends: 304 [2020-08-22 21:51:21,716 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 [2020-08-22 21:51:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-08-22 21:51:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-08-22 21:51:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 21:51:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 372 transitions. [2020-08-22 21:51:21,747 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 372 transitions. Word has length 180 [2020-08-22 21:51:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:21,748 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 372 transitions. [2020-08-22 21:51:21,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 21:51:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 372 transitions. [2020-08-22 21:51:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 21:51:21,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:21,750 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:21,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 21:51:21,750 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1683689272, now seen corresponding path program 1 times [2020-08-22 21:51:21,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:21,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996654665] [2020-08-22 21:51:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:21,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 21:51:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 6 proven. 567 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:22,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996654665] [2020-08-22 21:51:22,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:22,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 21:51:22,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758163053] [2020-08-22 21:51:22,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 21:51:22,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:22,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 21:51:22,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:22,142 INFO L87 Difference]: Start difference. First operand 304 states and 372 transitions. Second operand 19 states. [2020-08-22 21:51:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:22,520 INFO L93 Difference]: Finished difference Result 695 states and 837 transitions. [2020-08-22 21:51:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 21:51:22,521 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 21:51:22,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:22,524 INFO L225 Difference]: With dead ends: 695 [2020-08-22 21:51:22,524 INFO L226 Difference]: Without dead ends: 502 [2020-08-22 21:51:22,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 21:51:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-08-22 21:51:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 314. [2020-08-22 21:51:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 21:51:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 21:51:22,560 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 21:51:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:22,561 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 21:51:22,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 21:51:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 21:51:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-08-22 21:51:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:22,563 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:22,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 21:51:22,563 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -326698006, now seen corresponding path program 1 times [2020-08-22 21:51:22,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:22,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940610567] [2020-08-22 21:51:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 21:51:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:22,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 21:51:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 21:51:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 7 proven. 539 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:23,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940610567] [2020-08-22 21:51:23,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:23,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 21:51:23,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631969188] [2020-08-22 21:51:23,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 21:51:23,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:23,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 21:51:23,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 21:51:23,055 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 19 states. [2020-08-22 21:51:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:23,703 INFO L93 Difference]: Finished difference Result 585 states and 727 transitions. [2020-08-22 21:51:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 21:51:23,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 180 [2020-08-22 21:51:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:23,709 INFO L225 Difference]: With dead ends: 585 [2020-08-22 21:51:23,709 INFO L226 Difference]: Without dead ends: 394 [2020-08-22 21:51:23,711 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 [2020-08-22 21:51:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-08-22 21:51:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 314. [2020-08-22 21:51:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2020-08-22 21:51:23,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 385 transitions. [2020-08-22 21:51:23,745 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 385 transitions. Word has length 180 [2020-08-22 21:51:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:23,745 INFO L479 AbstractCegarLoop]: Abstraction has 314 states and 385 transitions. [2020-08-22 21:51:23,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 21:51:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 385 transitions. [2020-08-22 21:51:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 21:51:23,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:23,748 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:23,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 21:51:23,748 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:23,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1714201280, now seen corresponding path program 2 times [2020-08-22 21:51:23,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:23,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914328814] [2020-08-22 21:51:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:23,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 21:51:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 21:51:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 21:51:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 6 proven. 644 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:24,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914328814] [2020-08-22 21:51:24,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:24,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 21:51:24,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027514316] [2020-08-22 21:51:24,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 21:51:24,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 21:51:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 21:51:24,131 INFO L87 Difference]: Start difference. First operand 314 states and 385 transitions. Second operand 20 states. [2020-08-22 21:51:24,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:24,482 INFO L93 Difference]: Finished difference Result 722 states and 870 transitions. [2020-08-22 21:51:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 21:51:24,483 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 21:51:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:24,487 INFO L225 Difference]: With dead ends: 722 [2020-08-22 21:51:24,487 INFO L226 Difference]: Without dead ends: 524 [2020-08-22 21:51:24,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-08-22 21:51:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 324. [2020-08-22 21:51:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 21:51:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 21:51:24,523 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 21:51:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:24,524 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 21:51:24,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 21:51:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 21:51:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 21:51:24,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:24,526 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:24,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 21:51:24,526 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:24,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash 570378738, now seen corresponding path program 2 times [2020-08-22 21:51:24,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:24,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036497870] [2020-08-22 21:51:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-08-22 21:51:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2020-08-22 21:51:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:24,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2020-08-22 21:51:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 7 proven. 614 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:25,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036497870] [2020-08-22 21:51:25,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:25,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 21:51:25,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117736578] [2020-08-22 21:51:25,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 21:51:25,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 21:51:25,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 21:51:25,016 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 20 states. [2020-08-22 21:51:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:25,798 INFO L93 Difference]: Finished difference Result 604 states and 752 transitions. [2020-08-22 21:51:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 21:51:25,799 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 185 [2020-08-22 21:51:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:25,801 INFO L225 Difference]: With dead ends: 604 [2020-08-22 21:51:25,801 INFO L226 Difference]: Without dead ends: 408 [2020-08-22 21:51:25,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-08-22 21:51:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 324. [2020-08-22 21:51:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-08-22 21:51:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 398 transitions. [2020-08-22 21:51:25,837 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 398 transitions. Word has length 185 [2020-08-22 21:51:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:25,837 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 398 transitions. [2020-08-22 21:51:25,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 21:51:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 398 transitions. [2020-08-22 21:51:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 21:51:25,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:25,839 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:25,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 21:51:25,839 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash 922915896, now seen corresponding path program 3 times [2020-08-22 21:51:25,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:25,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862558472] [2020-08-22 21:51:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:25,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 21:51:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 21:51:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 21:51:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 6 proven. 726 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:26,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862558472] [2020-08-22 21:51:26,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:26,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 21:51:26,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473575650] [2020-08-22 21:51:26,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 21:51:26,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:26,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 21:51:26,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:26,260 INFO L87 Difference]: Start difference. First operand 324 states and 398 transitions. Second operand 21 states. [2020-08-22 21:51:26,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:26,650 INFO L93 Difference]: Finished difference Result 749 states and 903 transitions. [2020-08-22 21:51:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 21:51:26,654 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 21:51:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:26,657 INFO L225 Difference]: With dead ends: 749 [2020-08-22 21:51:26,658 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 21:51:26,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:51:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 21:51:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 334. [2020-08-22 21:51:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 21:51:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 21:51:26,697 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 21:51:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:26,697 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 21:51:26,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 21:51:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 21:51:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-08-22 21:51:26,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:26,699 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:26,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 21:51:26,699 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1087471382, now seen corresponding path program 3 times [2020-08-22 21:51:26,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:26,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899458471] [2020-08-22 21:51:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:26,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 21:51:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 21:51:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 21:51:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 7 proven. 694 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:27,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899458471] [2020-08-22 21:51:27,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:27,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 21:51:27,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100500511] [2020-08-22 21:51:27,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 21:51:27,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 21:51:27,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 21:51:27,293 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 21 states. [2020-08-22 21:51:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:28,139 INFO L93 Difference]: Finished difference Result 623 states and 777 transitions. [2020-08-22 21:51:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 21:51:28,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 190 [2020-08-22 21:51:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:28,141 INFO L225 Difference]: With dead ends: 623 [2020-08-22 21:51:28,141 INFO L226 Difference]: Without dead ends: 422 [2020-08-22 21:51:28,142 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 [2020-08-22 21:51:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-08-22 21:51:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 334. [2020-08-22 21:51:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 21:51:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 411 transitions. [2020-08-22 21:51:28,180 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 411 transitions. Word has length 190 [2020-08-22 21:51:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:28,180 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 411 transitions. [2020-08-22 21:51:28,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 21:51:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 411 transitions. [2020-08-22 21:51:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 21:51:28,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:28,182 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:28,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 21:51:28,183 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1276573760, now seen corresponding path program 4 times [2020-08-22 21:51:28,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:28,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214757268] [2020-08-22 21:51:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 21:51:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 21:51:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 21:51:28,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 6 proven. 813 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:28,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214757268] [2020-08-22 21:51:28,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:28,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 21:51:28,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013593322] [2020-08-22 21:51:28,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 21:51:28,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 21:51:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:51:28,801 INFO L87 Difference]: Start difference. First operand 334 states and 411 transitions. Second operand 22 states. [2020-08-22 21:51:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:29,429 INFO L93 Difference]: Finished difference Result 776 states and 936 transitions. [2020-08-22 21:51:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:51:29,429 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 21:51:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:29,434 INFO L225 Difference]: With dead ends: 776 [2020-08-22 21:51:29,434 INFO L226 Difference]: Without dead ends: 568 [2020-08-22 21:51:29,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2020-08-22 21:51:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2020-08-22 21:51:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 21:51:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 21:51:29,504 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 21:51:29,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:29,505 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 21:51:29,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 21:51:29,505 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 21:51:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 21:51:29,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:29,510 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:29,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 21:51:29,510 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:29,511 INFO L82 PathProgramCache]: Analyzing trace with hash -733813518, now seen corresponding path program 4 times [2020-08-22 21:51:29,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:29,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737056631] [2020-08-22 21:51:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:29,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:29,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:29,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2020-08-22 21:51:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-08-22 21:51:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2020-08-22 21:51:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 7 proven. 779 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:30,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737056631] [2020-08-22 21:51:30,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:30,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 21:51:30,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610692548] [2020-08-22 21:51:30,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 21:51:30,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 21:51:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 21:51:30,425 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 22 states. [2020-08-22 21:51:31,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:31,421 INFO L93 Difference]: Finished difference Result 642 states and 802 transitions. [2020-08-22 21:51:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 21:51:31,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-08-22 21:51:31,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:31,427 INFO L225 Difference]: With dead ends: 642 [2020-08-22 21:51:31,428 INFO L226 Difference]: Without dead ends: 436 [2020-08-22 21:51:31,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-08-22 21:51:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 344. [2020-08-22 21:51:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 21:51:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 424 transitions. [2020-08-22 21:51:31,469 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 424 transitions. Word has length 195 [2020-08-22 21:51:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:31,469 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 424 transitions. [2020-08-22 21:51:31,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 21:51:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 424 transitions. [2020-08-22 21:51:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 21:51:31,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:31,471 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:31,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 21:51:31,472 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:31,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash -171452104, now seen corresponding path program 5 times [2020-08-22 21:51:31,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:31,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376563474] [2020-08-22 21:51:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:31,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:31,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:31,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 21:51:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 21:51:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 21:51:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 944 backedges. 6 proven. 905 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:32,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376563474] [2020-08-22 21:51:32,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:32,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 21:51:32,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005961007] [2020-08-22 21:51:32,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 21:51:32,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:32,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 21:51:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:32,105 INFO L87 Difference]: Start difference. First operand 344 states and 424 transitions. Second operand 23 states. [2020-08-22 21:51:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:32,636 INFO L93 Difference]: Finished difference Result 803 states and 969 transitions. [2020-08-22 21:51:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 21:51:32,637 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 21:51:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:32,640 INFO L225 Difference]: With dead ends: 803 [2020-08-22 21:51:32,640 INFO L226 Difference]: Without dead ends: 590 [2020-08-22 21:51:32,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-08-22 21:51:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 354. [2020-08-22 21:51:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 21:51:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 21:51:32,683 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 21:51:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:32,684 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 21:51:32,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 21:51:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 21:51:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-22 21:51:32,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:32,686 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:32,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 21:51:32,686 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2113127914, now seen corresponding path program 5 times [2020-08-22 21:51:32,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:32,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473337672] [2020-08-22 21:51:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:32,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 21:51:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 21:51:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 21:51:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 7 proven. 869 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:33,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473337672] [2020-08-22 21:51:33,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:33,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 21:51:33,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298405545] [2020-08-22 21:51:33,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 21:51:33,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:33,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 21:51:33,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 21:51:33,290 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 23 states. [2020-08-22 21:51:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:34,615 INFO L93 Difference]: Finished difference Result 661 states and 827 transitions. [2020-08-22 21:51:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 21:51:34,616 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-08-22 21:51:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:34,619 INFO L225 Difference]: With dead ends: 661 [2020-08-22 21:51:34,619 INFO L226 Difference]: Without dead ends: 450 [2020-08-22 21:51:34,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-22 21:51:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 354. [2020-08-22 21:51:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-08-22 21:51:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 437 transitions. [2020-08-22 21:51:34,695 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 437 transitions. Word has length 200 [2020-08-22 21:51:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:34,696 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 437 transitions. [2020-08-22 21:51:34,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 21:51:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 437 transitions. [2020-08-22 21:51:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 21:51:34,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:34,700 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:34,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 21:51:34,701 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:34,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1093348544, now seen corresponding path program 6 times [2020-08-22 21:51:34,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:34,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50410823] [2020-08-22 21:51:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:34,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:34,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:34,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 21:51:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 21:51:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 21:51:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 6 proven. 1002 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:35,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50410823] [2020-08-22 21:51:35,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:35,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:51:35,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265897619] [2020-08-22 21:51:35,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:51:35,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:51:35,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:35,318 INFO L87 Difference]: Start difference. First operand 354 states and 437 transitions. Second operand 24 states. [2020-08-22 21:51:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:35,883 INFO L93 Difference]: Finished difference Result 830 states and 1002 transitions. [2020-08-22 21:51:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 21:51:35,884 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 21:51:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:35,888 INFO L225 Difference]: With dead ends: 830 [2020-08-22 21:51:35,888 INFO L226 Difference]: Without dead ends: 612 [2020-08-22 21:51:35,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-08-22 21:51:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 364. [2020-08-22 21:51:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 21:51:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 21:51:35,935 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 21:51:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:35,936 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 21:51:35,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:51:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 21:51:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-08-22 21:51:35,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:35,939 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:35,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 21:51:35,939 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1191231474, now seen corresponding path program 6 times [2020-08-22 21:51:35,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:35,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75274447] [2020-08-22 21:51:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:35,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2020-08-22 21:51:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-08-22 21:51:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2020-08-22 21:51:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 7 proven. 964 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:36,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75274447] [2020-08-22 21:51:36,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:36,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 21:51:36,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679200524] [2020-08-22 21:51:36,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 21:51:36,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 21:51:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 21:51:36,624 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 24 states. [2020-08-22 21:51:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:37,715 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2020-08-22 21:51:37,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 21:51:37,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 205 [2020-08-22 21:51:37,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:37,720 INFO L225 Difference]: With dead ends: 680 [2020-08-22 21:51:37,721 INFO L226 Difference]: Without dead ends: 464 [2020-08-22 21:51:37,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-08-22 21:51:37,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 364. [2020-08-22 21:51:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-08-22 21:51:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 450 transitions. [2020-08-22 21:51:37,766 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 450 transitions. Word has length 205 [2020-08-22 21:51:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:37,770 INFO L479 AbstractCegarLoop]: Abstraction has 364 states and 450 transitions. [2020-08-22 21:51:37,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 21:51:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 450 transitions. [2020-08-22 21:51:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 21:51:37,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:37,772 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:37,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 21:51:37,773 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1719328312, now seen corresponding path program 7 times [2020-08-22 21:51:37,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:37,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407803761] [2020-08-22 21:51:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:37,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:38,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 21:51:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:38,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 21:51:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:38,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 21:51:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 6 proven. 1104 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:38,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407803761] [2020-08-22 21:51:38,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:38,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 21:51:38,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489593116] [2020-08-22 21:51:38,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 21:51:38,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 21:51:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:38,410 INFO L87 Difference]: Start difference. First operand 364 states and 450 transitions. Second operand 25 states. [2020-08-22 21:51:38,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:38,976 INFO L93 Difference]: Finished difference Result 857 states and 1035 transitions. [2020-08-22 21:51:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:51:38,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 21:51:38,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:38,986 INFO L225 Difference]: With dead ends: 857 [2020-08-22 21:51:38,986 INFO L226 Difference]: Without dead ends: 634 [2020-08-22 21:51:38,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-08-22 21:51:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 374. [2020-08-22 21:51:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 21:51:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 21:51:39,033 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 21:51:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:39,034 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 21:51:39,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 21:51:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 21:51:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 21:51:39,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:39,036 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:39,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 21:51:39,037 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash -291058966, now seen corresponding path program 7 times [2020-08-22 21:51:39,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:39,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573993483] [2020-08-22 21:51:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 21:51:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 21:51:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 21:51:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 7 proven. 1064 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:39,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573993483] [2020-08-22 21:51:39,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:39,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 21:51:39,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522647482] [2020-08-22 21:51:39,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 21:51:39,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:39,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 21:51:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:51:39,729 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 25 states. [2020-08-22 21:51:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:40,822 INFO L93 Difference]: Finished difference Result 699 states and 877 transitions. [2020-08-22 21:51:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 21:51:40,822 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 210 [2020-08-22 21:51:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:40,824 INFO L225 Difference]: With dead ends: 699 [2020-08-22 21:51:40,824 INFO L226 Difference]: Without dead ends: 478 [2020-08-22 21:51:40,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-08-22 21:51:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 374. [2020-08-22 21:51:40,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-08-22 21:51:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 463 transitions. [2020-08-22 21:51:40,868 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 463 transitions. Word has length 210 [2020-08-22 21:51:40,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:40,869 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 463 transitions. [2020-08-22 21:51:40,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 21:51:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 463 transitions. [2020-08-22 21:51:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 21:51:40,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:40,871 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:40,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 21:51:40,871 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:40,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1312616000, now seen corresponding path program 8 times [2020-08-22 21:51:40,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:40,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381883340] [2020-08-22 21:51:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:40,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:41,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 21:51:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:41,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 21:51:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:41,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 21:51:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 6 proven. 1211 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:41,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381883340] [2020-08-22 21:51:41,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:41,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:51:41,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518947223] [2020-08-22 21:51:41,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:51:41,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:41,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:51:41,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:41,475 INFO L87 Difference]: Start difference. First operand 374 states and 463 transitions. Second operand 26 states. [2020-08-22 21:51:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:42,146 INFO L93 Difference]: Finished difference Result 884 states and 1068 transitions. [2020-08-22 21:51:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 21:51:42,147 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 21:51:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:42,151 INFO L225 Difference]: With dead ends: 884 [2020-08-22 21:51:42,151 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 21:51:42,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 21:51:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 384. [2020-08-22 21:51:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 21:51:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 21:51:42,198 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 21:51:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:42,199 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 21:51:42,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:51:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 21:51:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 21:51:42,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:42,201 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:42,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 21:51:42,201 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -697771278, now seen corresponding path program 8 times [2020-08-22 21:51:42,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:42,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166028013] [2020-08-22 21:51:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2020-08-22 21:51:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-08-22 21:51:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:42,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2020-08-22 21:51:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 7 proven. 1169 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:43,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166028013] [2020-08-22 21:51:43,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:43,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 21:51:43,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681621801] [2020-08-22 21:51:43,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 21:51:43,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:43,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 21:51:43,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 21:51:43,018 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 26 states. [2020-08-22 21:51:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:44,350 INFO L93 Difference]: Finished difference Result 718 states and 902 transitions. [2020-08-22 21:51:44,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 21:51:44,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 215 [2020-08-22 21:51:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:44,352 INFO L225 Difference]: With dead ends: 718 [2020-08-22 21:51:44,352 INFO L226 Difference]: Without dead ends: 492 [2020-08-22 21:51:44,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-08-22 21:51:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 384. [2020-08-22 21:51:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 21:51:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 476 transitions. [2020-08-22 21:51:44,395 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 476 transitions. Word has length 215 [2020-08-22 21:51:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:44,396 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 476 transitions. [2020-08-22 21:51:44,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 21:51:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 476 transitions. [2020-08-22 21:51:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 21:51:44,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:44,398 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:44,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 21:51:44,398 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:44,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1256956728, now seen corresponding path program 9 times [2020-08-22 21:51:44,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:44,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699217384] [2020-08-22 21:51:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 21:51:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 21:51:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 21:51:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1362 backedges. 6 proven. 1323 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:44,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699217384] [2020-08-22 21:51:44,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:44,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 21:51:44,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309959429] [2020-08-22 21:51:44,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 21:51:44,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:44,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 21:51:44,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:44,996 INFO L87 Difference]: Start difference. First operand 384 states and 476 transitions. Second operand 27 states. [2020-08-22 21:51:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:45,588 INFO L93 Difference]: Finished difference Result 911 states and 1101 transitions. [2020-08-22 21:51:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 21:51:45,589 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 21:51:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:45,592 INFO L225 Difference]: With dead ends: 911 [2020-08-22 21:51:45,593 INFO L226 Difference]: Without dead ends: 678 [2020-08-22 21:51:45,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:51:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-08-22 21:51:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 394. [2020-08-22 21:51:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 21:51:45,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 21:51:45,639 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 21:51:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:45,639 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 21:51:45,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 21:51:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 21:51:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-08-22 21:51:45,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:45,641 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:45,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 21:51:45,642 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash -753430550, now seen corresponding path program 9 times [2020-08-22 21:51:45,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:45,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393454710] [2020-08-22 21:51:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:45,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:45,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:45,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 21:51:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 21:51:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 21:51:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 7 proven. 1279 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-08-22 21:51:46,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393454710] [2020-08-22 21:51:46,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:46,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 21:51:46,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899512319] [2020-08-22 21:51:46,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 21:51:46,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:46,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 21:51:46,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 21:51:46,516 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 27 states. [2020-08-22 21:51:47,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:47,980 INFO L93 Difference]: Finished difference Result 737 states and 927 transitions. [2020-08-22 21:51:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 21:51:47,981 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 220 [2020-08-22 21:51:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:47,983 INFO L225 Difference]: With dead ends: 737 [2020-08-22 21:51:47,983 INFO L226 Difference]: Without dead ends: 506 [2020-08-22 21:51:47,984 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 [2020-08-22 21:51:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-22 21:51:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 394. [2020-08-22 21:51:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 21:51:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 489 transitions. [2020-08-22 21:51:48,025 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 489 transitions. Word has length 220 [2020-08-22 21:51:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:48,026 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 489 transitions. [2020-08-22 21:51:48,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 21:51:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 489 transitions. [2020-08-22 21:51:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 21:51:48,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:48,027 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:48,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 21:51:48,027 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:48,028 INFO L82 PathProgramCache]: Analyzing trace with hash -629192384, now seen corresponding path program 10 times [2020-08-22 21:51:48,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:48,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901965703] [2020-08-22 21:51:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 6 proven. 1440 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 21:51:48,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901965703] [2020-08-22 21:51:48,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:48,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 21:51:48,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084065076] [2020-08-22 21:51:48,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 21:51:48,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 21:51:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 21:51:48,669 INFO L87 Difference]: Start difference. First operand 394 states and 489 transitions. Second operand 28 states. [2020-08-22 21:51:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:49,301 INFO L93 Difference]: Finished difference Result 938 states and 1134 transitions. [2020-08-22 21:51:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 21:51:49,302 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 225 [2020-08-22 21:51:49,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:49,305 INFO L225 Difference]: With dead ends: 938 [2020-08-22 21:51:49,305 INFO L226 Difference]: Without dead ends: 700 [2020-08-22 21:51:49,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=407, Unknown=0, NotChecked=0, Total=812 [2020-08-22 21:51:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-08-22 21:51:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 404. [2020-08-22 21:51:49,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-08-22 21:51:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 502 transitions. [2020-08-22 21:51:49,354 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 502 transitions. Word has length 225 [2020-08-22 21:51:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:49,354 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 502 transitions. [2020-08-22 21:51:49,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 21:51:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 502 transitions. [2020-08-22 21:51:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-08-22 21:51:49,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:49,356 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:49,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 21:51:49,356 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1655387634, now seen corresponding path program 10 times [2020-08-22 21:51:49,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:49,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943132192] [2020-08-22 21:51:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-08-22 21:51:49,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943132192] [2020-08-22 21:51:49,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:49,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:49,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311235460] [2020-08-22 21:51:49,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:49,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:49,659 INFO L87 Difference]: Start difference. First operand 404 states and 502 transitions. Second operand 10 states. [2020-08-22 21:51:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:49,983 INFO L93 Difference]: Finished difference Result 459 states and 581 transitions. [2020-08-22 21:51:49,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:49,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 225 [2020-08-22 21:51:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:49,992 INFO L225 Difference]: With dead ends: 459 [2020-08-22 21:51:49,992 INFO L226 Difference]: Without dead ends: 453 [2020-08-22 21:51:49,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:49,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-08-22 21:51:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2020-08-22 21:51:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-08-22 21:51:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2020-08-22 21:51:50,056 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 225 [2020-08-22 21:51:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:50,057 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2020-08-22 21:51:50,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2020-08-22 21:51:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 21:51:50,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:50,059 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:50,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 21:51:50,060 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash -131719239, now seen corresponding path program 1 times [2020-08-22 21:51:50,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:50,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887945688] [2020-08-22 21:51:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-08-22 21:51:50,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887945688] [2020-08-22 21:51:50,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:50,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 21:51:50,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15282437] [2020-08-22 21:51:50,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 21:51:50,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:50,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 21:51:50,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 21:51:50,383 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand 12 states. [2020-08-22 21:51:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:50,695 INFO L93 Difference]: Finished difference Result 459 states and 579 transitions. [2020-08-22 21:51:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:50,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 227 [2020-08-22 21:51:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:50,698 INFO L225 Difference]: With dead ends: 459 [2020-08-22 21:51:50,698 INFO L226 Difference]: Without dead ends: 452 [2020-08-22 21:51:50,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-08-22 21:51:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-22 21:51:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-08-22 21:51:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-08-22 21:51:50,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 549 transitions. [2020-08-22 21:51:50,764 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 549 transitions. Word has length 227 [2020-08-22 21:51:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:50,765 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 549 transitions. [2020-08-22 21:51:50,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 21:51:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 549 transitions. [2020-08-22 21:51:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-08-22 21:51:50,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:50,767 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:50,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 21:51:50,768 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:50,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1678288039, now seen corresponding path program 1 times [2020-08-22 21:51:50,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:50,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722524550] [2020-08-22 21:51:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2020-08-22 21:51:50,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722524550] [2020-08-22 21:51:50,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:50,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 21:51:50,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441994323] [2020-08-22 21:51:50,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 21:51:50,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:50,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 21:51:50,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 21:51:50,922 INFO L87 Difference]: Start difference. First operand 438 states and 549 transitions. Second operand 6 states. [2020-08-22 21:51:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:51,021 INFO L93 Difference]: Finished difference Result 444 states and 554 transitions. [2020-08-22 21:51:51,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 21:51:51,022 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 227 [2020-08-22 21:51:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:51,024 INFO L225 Difference]: With dead ends: 444 [2020-08-22 21:51:51,024 INFO L226 Difference]: Without dead ends: 432 [2020-08-22 21:51:51,025 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 [2020-08-22 21:51:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-08-22 21:51:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2020-08-22 21:51:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-08-22 21:51:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 541 transitions. [2020-08-22 21:51:51,119 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 541 transitions. Word has length 227 [2020-08-22 21:51:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:51,119 INFO L479 AbstractCegarLoop]: Abstraction has 432 states and 541 transitions. [2020-08-22 21:51:51,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 21:51:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 541 transitions. [2020-08-22 21:51:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-22 21:51:51,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:51,121 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:51,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 21:51:51,121 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:51,122 INFO L82 PathProgramCache]: Analyzing trace with hash 947853182, now seen corresponding path program 1 times [2020-08-22 21:51:51,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:51,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352794258] [2020-08-22 21:51:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 21:51:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 21:51:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 21:51:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 21:51:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2020-08-22 21:51:51,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352794258] [2020-08-22 21:51:51,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:51,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 21:51:51,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455604076] [2020-08-22 21:51:51,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 21:51:51,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:51,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 21:51:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 21:51:51,285 INFO L87 Difference]: Start difference. First operand 432 states and 541 transitions. Second operand 5 states. [2020-08-22 21:51:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:51,433 INFO L93 Difference]: Finished difference Result 691 states and 868 transitions. [2020-08-22 21:51:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 21:51:51,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2020-08-22 21:51:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:51,436 INFO L225 Difference]: With dead ends: 691 [2020-08-22 21:51:51,437 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 21:51:51,438 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 [2020-08-22 21:51:51,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 21:51:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 263. [2020-08-22 21:51:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-08-22 21:51:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2020-08-22 21:51:51,481 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 230 [2020-08-22 21:51:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:51,482 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2020-08-22 21:51:51,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 21:51:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2020-08-22 21:51:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 21:51:51,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:51,485 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:51,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 21:51:51,485 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash -671277925, now seen corresponding path program 1 times [2020-08-22 21:51:51,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:51,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977073210] [2020-08-22 21:51:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:51,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2020-08-22 21:51:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1422 trivial. 0 not checked. [2020-08-22 21:51:51,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977073210] [2020-08-22 21:51:51,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 21:51:51,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 21:51:51,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753985188] [2020-08-22 21:51:51,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 21:51:51,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 21:51:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 21:51:51,746 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 8 states. [2020-08-22 21:51:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:51,892 INFO L93 Difference]: Finished difference Result 317 states and 389 transitions. [2020-08-22 21:51:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 21:51:51,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 236 [2020-08-22 21:51:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:51,894 INFO L225 Difference]: With dead ends: 317 [2020-08-22 21:51:51,894 INFO L226 Difference]: Without dead ends: 298 [2020-08-22 21:51:51,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-08-22 21:51:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 269. [2020-08-22 21:51:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-22 21:51:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-08-22 21:51:51,948 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 236 [2020-08-22 21:51:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:51,948 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-08-22 21:51:51,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 21:51:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-08-22 21:51:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-08-22 21:51:51,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:51,952 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:51,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 21:51:51,952 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 287100319, now seen corresponding path program 1 times [2020-08-22 21:51:51,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:51,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630574132] [2020-08-22 21:51:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2020-08-22 21:51:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2020-08-22 21:51:52,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630574132] [2020-08-22 21:51:52,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:52,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 21:51:52,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449864100] [2020-08-22 21:51:52,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 21:51:52,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:52,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 21:51:52,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 21:51:52,289 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 11 states. [2020-08-22 21:51:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:52,534 INFO L93 Difference]: Finished difference Result 334 states and 403 transitions. [2020-08-22 21:51:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:52,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 240 [2020-08-22 21:51:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:52,536 INFO L225 Difference]: With dead ends: 334 [2020-08-22 21:51:52,536 INFO L226 Difference]: Without dead ends: 272 [2020-08-22 21:51:52,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-08-22 21:51:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-08-22 21:51:52,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2020-08-22 21:51:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-08-22 21:51:52,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2020-08-22 21:51:52,593 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 240 [2020-08-22 21:51:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:52,595 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2020-08-22 21:51:52,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 21:51:52,595 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2020-08-22 21:51:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-08-22 21:51:52,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:52,599 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:52,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 21:51:52,599 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -333217243, now seen corresponding path program 1 times [2020-08-22 21:51:52,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:52,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756221510] [2020-08-22 21:51:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 21:51:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2020-08-22 21:51:52,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756221510] [2020-08-22 21:51:52,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:52,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 21:51:52,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120953021] [2020-08-22 21:51:52,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 21:51:52,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 21:51:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:51:52,860 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 9 states. [2020-08-22 21:51:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:53,067 INFO L93 Difference]: Finished difference Result 331 states and 402 transitions. [2020-08-22 21:51:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 21:51:53,068 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 241 [2020-08-22 21:51:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:53,070 INFO L225 Difference]: With dead ends: 331 [2020-08-22 21:51:53,070 INFO L226 Difference]: Without dead ends: 319 [2020-08-22 21:51:53,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:51:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-08-22 21:51:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 311. [2020-08-22 21:51:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-08-22 21:51:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 382 transitions. [2020-08-22 21:51:53,144 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 382 transitions. Word has length 241 [2020-08-22 21:51:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:53,144 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 382 transitions. [2020-08-22 21:51:53,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 21:51:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 382 transitions. [2020-08-22 21:51:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-22 21:51:53,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:53,147 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:53,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 21:51:53,147 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1780452488, now seen corresponding path program 1 times [2020-08-22 21:51:53,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:53,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496950764] [2020-08-22 21:51:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-08-22 21:51:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 21:51:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1433 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1424 trivial. 0 not checked. [2020-08-22 21:51:53,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496950764] [2020-08-22 21:51:53,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:53,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 21:51:53,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81831763] [2020-08-22 21:51:53,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 21:51:53,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 21:51:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 21:51:53,398 INFO L87 Difference]: Start difference. First operand 311 states and 382 transitions. Second operand 10 states. [2020-08-22 21:51:53,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:51:53,678 INFO L93 Difference]: Finished difference Result 323 states and 393 transitions. [2020-08-22 21:51:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 21:51:53,679 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 244 [2020-08-22 21:51:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:51:53,681 INFO L225 Difference]: With dead ends: 323 [2020-08-22 21:51:53,681 INFO L226 Difference]: Without dead ends: 297 [2020-08-22 21:51:53,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 21:51:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-08-22 21:51:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 268. [2020-08-22 21:51:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-08-22 21:51:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 305 transitions. [2020-08-22 21:51:53,750 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 305 transitions. Word has length 244 [2020-08-22 21:51:53,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:51:53,752 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 305 transitions. [2020-08-22 21:51:53,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 21:51:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 305 transitions. [2020-08-22 21:51:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-08-22 21:51:53,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:51:53,755 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:51:53,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 21:51:53,755 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:51:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:51:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1623599199, now seen corresponding path program 1 times [2020-08-22 21:51:53,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:51:53,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841116106] [2020-08-22 21:51:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:51:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:51:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:51:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:53,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:51:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:51:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-08-22 21:51:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:54,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 21:51:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:51:56,541 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 32 [2020-08-22 21:51:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1421 trivial. 0 not checked. [2020-08-22 21:51:56,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841116106] [2020-08-22 21:51:56,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:51:56,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 21:51:56,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903209145] [2020-08-22 21:51:56,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 21:51:56,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:51:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 21:51:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 21:51:56,612 INFO L87 Difference]: Start difference. First operand 268 states and 305 transitions. Second operand 16 states. [2020-08-22 21:51:59,483 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-08-22 21:52:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:52:01,666 INFO L93 Difference]: Finished difference Result 327 states and 371 transitions. [2020-08-22 21:52:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 21:52:01,667 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 245 [2020-08-22 21:52:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:52:01,669 INFO L225 Difference]: With dead ends: 327 [2020-08-22 21:52:01,669 INFO L226 Difference]: Without dead ends: 315 [2020-08-22 21:52:01,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-08-22 21:52:01,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-08-22 21:52:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2020-08-22 21:52:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-22 21:52:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 351 transitions. [2020-08-22 21:52:01,726 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 351 transitions. Word has length 245 [2020-08-22 21:52:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:52:01,727 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 351 transitions. [2020-08-22 21:52:01,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 21:52:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 351 transitions. [2020-08-22 21:52:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-22 21:52:01,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 21:52:01,729 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 21:52:01,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 21:52:01,729 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 21:52:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 21:52:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash 818281555, now seen corresponding path program 2 times [2020-08-22 21:52:01,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 21:52:01,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845433856] [2020-08-22 21:52:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 21:52:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:52:01,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 21:52:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:52:01,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 21:52:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:52:01,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 21:52:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:52:01,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2020-08-22 21:52:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:52:01,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 21:52:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:52:01,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2020-08-22 21:52:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 21:52:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2020-08-22 21:52:02,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845433856] [2020-08-22 21:52:02,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 21:52:02,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 21:52:02,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990222878] [2020-08-22 21:52:02,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 21:52:02,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 21:52:02,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 21:52:02,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 21:52:02,104 INFO L87 Difference]: Start difference. First operand 307 states and 351 transitions. Second operand 9 states. [2020-08-22 21:52:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 21:52:02,327 INFO L93 Difference]: Finished difference Result 307 states and 351 transitions. [2020-08-22 21:52:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 21:52:02,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 246 [2020-08-22 21:52:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 21:52:02,329 INFO L225 Difference]: With dead ends: 307 [2020-08-22 21:52:02,329 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 21:52:02,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-08-22 21:52:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 21:52:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 21:52:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 21:52:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 21:52:02,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 246 [2020-08-22 21:52:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 21:52:02,333 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 21:52:02,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 21:52:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 21:52:02,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 21:52:02,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 21:52:02,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 21:52:06,136 WARN L193 SmtUtils]: Spent 3.64 s on a formula simplification. DAG size of input: 492 DAG size of output: 4 [2020-08-22 21:52:09,789 WARN L193 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 561 DAG size of output: 4 [2020-08-22 21:52:10,306 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 4 [2020-08-22 21:52:10,671 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 4 [2020-08-22 21:52:11,051 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 586 DAG size of output: 137 [2020-08-22 21:52:12,600 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 427 DAG size of output: 4 [2020-08-22 21:52:13,495 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 4 [2020-08-22 21:52:16,301 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 526 DAG size of output: 4 [2020-08-22 21:52:16,472 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 4 [2020-08-22 21:52:20,598 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 601 DAG size of output: 8 [2020-08-22 21:52:23,894 WARN L193 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 21:52:24,290 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:52:25,973 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 459 DAG size of output: 4 [2020-08-22 21:52:26,633 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 4 [2020-08-22 21:52:27,022 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 4 [2020-08-22 21:52:27,223 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 4 [2020-08-22 21:52:27,520 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:52:30,815 WARN L193 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 592 DAG size of output: 4 [2020-08-22 21:52:31,094 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:52:31,371 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 136 [2020-08-22 21:52:32,687 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 396 DAG size of output: 4 [2020-08-22 21:52:33,612 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 4 [2020-08-22 21:52:33,720 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 4 [2020-08-22 21:52:36,416 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 499 DAG size of output: 4 [2020-08-22 21:52:40,238 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 568 DAG size of output: 4 [2020-08-22 21:52:40,844 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 4 [2020-08-22 21:52:41,198 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 4 [2020-08-22 21:52:43,197 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 434 DAG size of output: 4 [2020-08-22 21:52:44,183 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 4 [2020-08-22 21:52:47,202 WARN L193 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 533 DAG size of output: 4 [2020-08-22 21:52:47,420 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 4 [2020-08-22 21:52:53,003 WARN L193 SmtUtils]: Spent 5.58 s on a formula simplification. DAG size of input: 578 DAG size of output: 8 [2020-08-22 21:52:58,948 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 21:52:59,233 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:53:01,402 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 466 DAG size of output: 4 [2020-08-22 21:53:02,186 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 4 [2020-08-22 21:53:02,683 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 4 [2020-08-22 21:53:02,942 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 4 [2020-08-22 21:53:03,228 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:53:09,026 WARN L193 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 571 DAG size of output: 4 [2020-08-22 21:53:09,374 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:53:09,661 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 578 DAG size of output: 13 [2020-08-22 21:53:11,336 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 403 DAG size of output: 4 [2020-08-22 21:53:12,497 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 373 DAG size of output: 4 [2020-08-22 21:53:12,636 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 4 [2020-08-22 21:53:13,141 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 4 [2020-08-22 21:53:13,431 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 4 [2020-08-22 21:53:13,777 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:14,008 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 4 [2020-08-22 21:53:14,136 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 4 [2020-08-22 21:53:14,615 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 4 [2020-08-22 21:53:14,973 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 4 [2020-08-22 21:53:15,274 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 21:53:15,443 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:15,688 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 4 [2020-08-22 21:53:15,800 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 4 [2020-08-22 21:53:16,117 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:16,399 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 4 [2020-08-22 21:53:16,568 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:16,737 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 137 [2020-08-22 21:53:16,939 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 4 [2020-08-22 21:53:17,079 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 4 [2020-08-22 21:53:34,855 WARN L193 SmtUtils]: Spent 16.26 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 21:54:00,730 WARN L193 SmtUtils]: Spent 25.87 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 21:54:03,724 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 21:54:05,450 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 21:54:22,952 WARN L193 SmtUtils]: Spent 17.50 s on a formula simplification. DAG size of input: 1495 DAG size of output: 9 [2020-08-22 21:54:23,282 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 21:54:32,725 WARN L193 SmtUtils]: Spent 9.44 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 21:54:38,070 WARN L193 SmtUtils]: Spent 5.34 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 21:54:57,896 WARN L193 SmtUtils]: Spent 19.82 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 21:54:58,869 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 21:55:26,475 WARN L193 SmtUtils]: Spent 27.60 s on a formula simplification. DAG size of input: 1154 DAG size of output: 11 [2020-08-22 21:55:26,645 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 21:55:56,639 WARN L193 SmtUtils]: Spent 29.99 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 21:56:11,786 WARN L193 SmtUtils]: Spent 15.14 s on a formula simplification. DAG size of input: 1153 DAG size of output: 991 [2020-08-22 21:56:24,346 WARN L193 SmtUtils]: Spent 12.54 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 21:56:28,572 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 21:56:30,841 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 21:56:32,112 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 21:56:47,112 WARN L193 SmtUtils]: Spent 15.00 s on a formula simplification. DAG size of input: 1154 DAG size of output: 992 [2020-08-22 21:57:17,032 WARN L193 SmtUtils]: Spent 29.91 s on a formula simplification. DAG size of input: 1135 DAG size of output: 9 [2020-08-22 21:57:32,143 WARN L193 SmtUtils]: Spent 15.11 s on a formula simplification. DAG size of input: 1154 DAG size of output: 992 [2020-08-22 21:57:47,238 WARN L193 SmtUtils]: Spent 15.09 s on a formula simplification. DAG size of input: 1154 DAG size of output: 992 [2020-08-22 21:57:47,697 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 21:57:55,438 WARN L193 SmtUtils]: Spent 7.74 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 21:58:01,718 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 21:58:02,373 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 21:58:02,491 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 21:58:19,770 WARN L193 SmtUtils]: Spent 16.43 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 21:58:46,173 WARN L193 SmtUtils]: Spent 26.40 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 21:58:49,448 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 21:58:51,213 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 21:59:09,850 WARN L193 SmtUtils]: Spent 18.63 s on a formula simplification. DAG size of input: 1498 DAG size of output: 9 [2020-08-22 21:59:10,182 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-08-22 21:59:20,013 WARN L193 SmtUtils]: Spent 9.82 s on a formula simplification. DAG size of input: 829 DAG size of output: 9 [2020-08-22 21:59:25,487 WARN L193 SmtUtils]: Spent 5.47 s on a formula simplification. DAG size of input: 653 DAG size of output: 9 [2020-08-22 21:59:46,306 WARN L193 SmtUtils]: Spent 20.82 s on a formula simplification. DAG size of input: 1024 DAG size of output: 9 [2020-08-22 21:59:47,249 WARN L193 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 9 [2020-08-22 22:00:16,801 WARN L193 SmtUtils]: Spent 29.55 s on a formula simplification. DAG size of input: 1159 DAG size of output: 11 [2020-08-22 22:00:16,978 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 9 [2020-08-22 22:00:49,091 WARN L193 SmtUtils]: Spent 32.11 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 22:01:05,231 WARN L193 SmtUtils]: Spent 16.14 s on a formula simplification. DAG size of input: 1158 DAG size of output: 997 [2020-08-22 22:01:18,042 WARN L193 SmtUtils]: Spent 12.79 s on a formula simplification. DAG size of input: 892 DAG size of output: 9 [2020-08-22 22:01:22,294 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 598 DAG size of output: 9 [2020-08-22 22:01:24,599 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 494 DAG size of output: 9 [2020-08-22 22:01:25,894 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 398 DAG size of output: 9 [2020-08-22 22:01:41,344 WARN L193 SmtUtils]: Spent 15.45 s on a formula simplification. DAG size of input: 1159 DAG size of output: 995 [2020-08-22 22:02:10,433 WARN L193 SmtUtils]: Spent 29.08 s on a formula simplification. DAG size of input: 1138 DAG size of output: 9 [2020-08-22 22:02:25,556 WARN L193 SmtUtils]: Spent 15.12 s on a formula simplification. DAG size of input: 1159 DAG size of output: 998 [2020-08-22 22:02:40,716 WARN L193 SmtUtils]: Spent 15.16 s on a formula simplification. DAG size of input: 1159 DAG size of output: 998 [2020-08-22 22:02:41,177 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-08-22 22:02:48,877 WARN L193 SmtUtils]: Spent 7.70 s on a formula simplification. DAG size of input: 768 DAG size of output: 9 [2020-08-22 22:02:55,142 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 709 DAG size of output: 9 [2020-08-22 22:02:55,799 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 9 [2020-08-22 22:02:55,920 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-08-22 22:02:57,851 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 445 DAG size of output: 4 [2020-08-22 22:03:00,815 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 510 DAG size of output: 4 [2020-08-22 22:03:01,217 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 4 [2020-08-22 22:03:01,442 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 4 [2020-08-22 22:03:02,139 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 8 [2020-08-22 22:03:03,568 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 384 DAG size of output: 4 [2020-08-22 22:03:04,235 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 4 [2020-08-22 22:03:06,646 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 477 DAG size of output: 4 [2020-08-22 22:03:06,765 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 4 [2020-08-22 22:03:09,650 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 546 DAG size of output: 8 [2020-08-22 22:03:12,035 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:03:12,151 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:13,533 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 414 DAG size of output: 4 [2020-08-22 22:03:14,072 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 4 [2020-08-22 22:03:14,384 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 4 [2020-08-22 22:03:14,537 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 4 [2020-08-22 22:03:14,661 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:17,070 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:03:17,186 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:17,304 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:18,488 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 355 DAG size of output: 4 [2020-08-22 22:03:19,347 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 4 [2020-08-22 22:03:21,557 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 445 DAG size of output: 4 [2020-08-22 22:03:24,515 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 510 DAG size of output: 4 [2020-08-22 22:03:24,915 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 4 [2020-08-22 22:03:25,140 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 4 [2020-08-22 22:03:25,836 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 8 [2020-08-22 22:03:27,255 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 384 DAG size of output: 4 [2020-08-22 22:03:27,923 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 4 [2020-08-22 22:03:30,335 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 477 DAG size of output: 4 [2020-08-22 22:03:30,460 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 4 [2020-08-22 22:03:33,343 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 546 DAG size of output: 8 [2020-08-22 22:03:35,734 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:03:35,852 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:37,250 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 414 DAG size of output: 4 [2020-08-22 22:03:37,793 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 4 [2020-08-22 22:03:38,109 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 4 [2020-08-22 22:03:38,264 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 4 [2020-08-22 22:03:38,389 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:40,763 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 540 DAG size of output: 4 [2020-08-22 22:03:40,880 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:40,998 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 4 [2020-08-22 22:03:42,182 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 355 DAG size of output: 4 [2020-08-22 22:03:43,039 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 4 [2020-08-22 22:03:59,715 WARN L193 SmtUtils]: Spent 16.39 s on a formula simplification. DAG size of input: 957 DAG size of output: 9 [2020-08-22 22:04:26,020 WARN L193 SmtUtils]: Spent 26.30 s on a formula simplification. DAG size of input: 1093 DAG size of output: 9 [2020-08-22 22:04:29,225 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 545 DAG size of output: 9 [2020-08-22 22:04:30,973 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 445 DAG size of output: 9 [2020-08-22 22:04:49,637 WARN L193 SmtUtils]: Spent 18.66 s on a formula simplification. DAG size of input: 1498 DAG size of output: 9 [2020-08-22 22:04:49,971 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9