/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:25:10,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:25:10,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:25:10,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:25:10,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:25:10,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:25:10,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:25:10,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:25:10,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:25:10,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:25:10,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:25:10,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:25:10,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:25:10,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:25:10,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:25:10,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:25:10,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:25:10,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:25:10,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:25:10,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:25:10,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:25:10,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:25:10,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:25:10,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:25:10,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 11:25:10,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:25:10,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:25:10,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:25:10,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:25:10,289 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:25:10,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:25:10,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:25:10,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:25:10,294 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:25:10,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:25:10,295 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:25:10,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:25:10,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:25:10,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:25:10,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:25:10,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:25:10,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:25:10,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:25:10,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:25:10,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:25:10,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:25:10,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:25:10,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:25:10,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:25:10,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:25:10,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:25:10,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:25:10,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:25:10,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:25:10,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:25:10,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:25:10,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:25:10,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:25:10,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 11:25:10,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:25:10,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:25:10,649 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:25:10,651 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:25:10,652 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:25:10,652 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 11:25:10,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a069f047/cbae04e29f4e44e79242b39a2a0296b7/FLAG9b0681aa7 [2020-08-18 11:25:11,420 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:25:11,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 11:25:11,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a069f047/cbae04e29f4e44e79242b39a2a0296b7/FLAG9b0681aa7 [2020-08-18 11:25:11,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a069f047/cbae04e29f4e44e79242b39a2a0296b7 [2020-08-18 11:25:11,682 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:25:11,684 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:25:11,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:25:11,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:25:11,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:25:11,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:25:11" (1/1) ... [2020-08-18 11:25:11,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678b2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:11, skipping insertion in model container [2020-08-18 11:25:11,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:25:11" (1/1) ... [2020-08-18 11:25:11,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:25:11,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:25:12,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:25:12,334 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:25:12,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:25:12,491 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:25:12,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12 WrapperNode [2020-08-18 11:25:12,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:25:12,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:25:12,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:25:12,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:25:12,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... [2020-08-18 11:25:12,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... [2020-08-18 11:25:12,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... [2020-08-18 11:25:12,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... [2020-08-18 11:25:12,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... [2020-08-18 11:25:12,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... [2020-08-18 11:25:12,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... [2020-08-18 11:25:12,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:25:12,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:25:12,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:25:12,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:25:12,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:25:12,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:25:12,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:25:12,716 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 11:25:12,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:25:12,717 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 11:25:12,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:25:12,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 11:25:12,717 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 11:25:12,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:25:12,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:25:12,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:25:14,113 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:25:14,113 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 11:25:14,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:25:14 BoogieIcfgContainer [2020-08-18 11:25:14,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:25:14,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:25:14,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:25:14,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:25:14,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:25:11" (1/3) ... [2020-08-18 11:25:14,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bebc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:25:14, skipping insertion in model container [2020-08-18 11:25:14,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:25:12" (2/3) ... [2020-08-18 11:25:14,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71bebc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:25:14, skipping insertion in model container [2020-08-18 11:25:14,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:25:14" (3/3) ... [2020-08-18 11:25:14,129 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-18 11:25:14,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:25:14,148 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:25:14,161 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:25:14,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:25:14,184 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:25:14,184 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:25:14,184 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:25:14,185 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:25:14,185 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:25:14,185 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:25:14,185 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:25:14,208 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 11:25:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 11:25:14,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:14,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:14,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-18 11:25:14,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:14,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108450662] [2020-08-18 11:25:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:25:14,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108450662] [2020-08-18 11:25:14,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:25:14,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 11:25:14,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731327510] [2020-08-18 11:25:14,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:25:14,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:14,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:25:14,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:25:14,584 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 11:25:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:17,501 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-18 11:25:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 11:25:17,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-18 11:25:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:17,535 INFO L225 Difference]: With dead ends: 886 [2020-08-18 11:25:17,536 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 11:25:17,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 11:25:17,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-18 11:25:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-18 11:25:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-18 11:25:17,644 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-18 11:25:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:17,645 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-18 11:25:17,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:25:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-18 11:25:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 11:25:17,652 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:17,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:17,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:25:17,653 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:17,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-18 11:25:17,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:17,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37391347] [2020-08-18 11:25:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:17,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:25:17,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37391347] [2020-08-18 11:25:17,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:25:17,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:25:17,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116347056] [2020-08-18 11:25:17,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:25:17,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:25:17,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:25:17,923 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-18 11:25:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:19,884 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-18 11:25:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:25:19,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-18 11:25:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:19,891 INFO L225 Difference]: With dead ends: 1320 [2020-08-18 11:25:19,891 INFO L226 Difference]: Without dead ends: 768 [2020-08-18 11:25:19,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:25:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-18 11:25:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-18 11:25:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-18 11:25:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-18 11:25:19,939 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-18 11:25:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:19,939 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-18 11:25:19,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:25:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-18 11:25:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-18 11:25:19,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:19,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:19,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:25:19,946 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-18 11:25:19,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:19,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956594662] [2020-08-18 11:25:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:20,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:20,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:20,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:25:20,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956594662] [2020-08-18 11:25:20,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:25:20,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 11:25:20,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963687577] [2020-08-18 11:25:20,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:25:20,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:20,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:25:20,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:25:20,252 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-18 11:25:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:22,141 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-18 11:25:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 11:25:22,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-18 11:25:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:22,148 INFO L225 Difference]: With dead ends: 1330 [2020-08-18 11:25:22,148 INFO L226 Difference]: Without dead ends: 770 [2020-08-18 11:25:22,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 11:25:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-18 11:25:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-18 11:25:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-18 11:25:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-18 11:25:22,184 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-18 11:25:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:22,185 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-18 11:25:22,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:25:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-18 11:25:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-18 11:25:22,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:22,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:22,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 11:25:22,192 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-18 11:25:22,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:22,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782842055] [2020-08-18 11:25:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:22,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:22,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:22,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 11:25:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-18 11:25:22,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782842055] [2020-08-18 11:25:22,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:22,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 11:25:22,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564735983] [2020-08-18 11:25:22,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:25:22,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:22,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:25:22,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:25:22,524 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-18 11:25:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:24,525 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-18 11:25:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:25:24,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-18 11:25:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:24,544 INFO L225 Difference]: With dead ends: 2246 [2020-08-18 11:25:24,544 INFO L226 Difference]: Without dead ends: 1498 [2020-08-18 11:25:24,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:25:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-18 11:25:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-18 11:25:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-18 11:25:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-18 11:25:24,631 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-18 11:25:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:24,633 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-18 11:25:24,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:25:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-18 11:25:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-18 11:25:24,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:24,648 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2020-08-18 11:25:24,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 11:25:24,649 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-18 11:25:24,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:24,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124151937] [2020-08-18 11:25:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:24,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:24,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:24,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 11:25:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:25,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-18 11:25:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 11:25:25,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124151937] [2020-08-18 11:25:25,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:25,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:25:25,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782259257] [2020-08-18 11:25:25,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:25:25,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:25:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:25:25,448 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-18 11:25:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:28,040 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-18 11:25:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 11:25:28,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-18 11:25:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:28,051 INFO L225 Difference]: With dead ends: 3081 [2020-08-18 11:25:28,051 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 11:25:28,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 11:25:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 11:25:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-18 11:25:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-18 11:25:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-18 11:25:28,105 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-18 11:25:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:28,106 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-18 11:25:28,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:25:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-18 11:25:28,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-18 11:25:28,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:28,113 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:28,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 11:25:28,114 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:28,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-18 11:25:28,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:28,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952422643] [2020-08-18 11:25:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:28,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:28,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:28,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 11:25:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:28,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 11:25:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-18 11:25:29,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952422643] [2020-08-18 11:25:29,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:29,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 11:25:29,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814902370] [2020-08-18 11:25:29,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 11:25:29,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:29,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 11:25:29,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 11:25:29,048 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-18 11:25:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:31,280 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-18 11:25:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 11:25:31,281 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-18 11:25:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:31,291 INFO L225 Difference]: With dead ends: 3607 [2020-08-18 11:25:31,292 INFO L226 Difference]: Without dead ends: 1923 [2020-08-18 11:25:31,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:25:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-18 11:25:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-18 11:25:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 11:25:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-18 11:25:31,358 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-18 11:25:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:31,359 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-18 11:25:31,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 11:25:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-18 11:25:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-18 11:25:31,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:31,367 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:31,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 11:25:31,367 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-18 11:25:31,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:31,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826294486] [2020-08-18 11:25:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:31,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:31,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:31,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 11:25:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:31,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-18 11:25:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-18 11:25:31,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826294486] [2020-08-18 11:25:31,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:31,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:25:31,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267336690] [2020-08-18 11:25:31,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:25:31,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:31,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:25:31,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:25:31,933 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-18 11:25:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:35,784 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-18 11:25:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 11:25:35,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-18 11:25:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:35,803 INFO L225 Difference]: With dead ends: 5807 [2020-08-18 11:25:35,803 INFO L226 Difference]: Without dead ends: 3550 [2020-08-18 11:25:35,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-18 11:25:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-18 11:25:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-18 11:25:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 11:25:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-18 11:25:35,898 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-18 11:25:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:35,899 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-18 11:25:35,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:25:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-18 11:25:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-18 11:25:35,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:35,916 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:25:35,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 11:25:35,916 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:35,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-18 11:25:35,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:35,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476092382] [2020-08-18 11:25:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 11:25:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-18 11:25:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-18 11:25:36,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476092382] [2020-08-18 11:25:36,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:36,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 11:25:36,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770520772] [2020-08-18 11:25:36,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:25:36,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:36,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:25:36,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:36,702 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-18 11:25:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:38,264 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-18 11:25:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:25:38,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-18 11:25:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:38,283 INFO L225 Difference]: With dead ends: 6928 [2020-08-18 11:25:38,283 INFO L226 Difference]: Without dead ends: 3938 [2020-08-18 11:25:38,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:25:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-18 11:25:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-18 11:25:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-18 11:25:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-18 11:25:38,384 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-18 11:25:38,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:38,385 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-18 11:25:38,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:25:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-18 11:25:38,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-18 11:25:38,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:38,409 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 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] [2020-08-18 11:25:38,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 11:25:38,409 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-18 11:25:38,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:38,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182636043] [2020-08-18 11:25:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:38,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:38,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:38,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:38,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:38,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:38,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-18 11:25:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-18 11:25:39,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182636043] [2020-08-18 11:25:39,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:39,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 11:25:39,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992535194] [2020-08-18 11:25:39,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:25:39,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:25:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:39,154 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-18 11:25:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:40,761 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-18 11:25:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:25:40,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-18 11:25:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:40,781 INFO L225 Difference]: With dead ends: 8034 [2020-08-18 11:25:40,781 INFO L226 Difference]: Without dead ends: 4484 [2020-08-18 11:25:40,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:25:40,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-18 11:25:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-18 11:25:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-18 11:25:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-18 11:25:40,898 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-18 11:25:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:40,899 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-18 11:25:40,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:25:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-18 11:25:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-18 11:25:40,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:40,918 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:40,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 11:25:40,918 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-18 11:25:40,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:40,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507778798] [2020-08-18 11:25:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 11:25:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-18 11:25:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-18 11:25:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:41,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-18 11:25:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-18 11:25:42,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507778798] [2020-08-18 11:25:42,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:42,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 11:25:42,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61426475] [2020-08-18 11:25:42,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:25:42,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:42,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:25:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:42,188 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-18 11:25:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:44,014 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-18 11:25:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:25:44,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-18 11:25:44,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:44,034 INFO L225 Difference]: With dead ends: 8817 [2020-08-18 11:25:44,034 INFO L226 Difference]: Without dead ends: 4494 [2020-08-18 11:25:44,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 11:25:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-18 11:25:44,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-18 11:25:44,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-18 11:25:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-18 11:25:44,171 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-18 11:25:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:44,172 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-18 11:25:44,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:25:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-18 11:25:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-18 11:25:44,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:44,191 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:44,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 11:25:44,191 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:44,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:44,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-18 11:25:44,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:44,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980638897] [2020-08-18 11:25:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 11:25:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:44,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-18 11:25:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-18 11:25:45,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980638897] [2020-08-18 11:25:45,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:45,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 11:25:45,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897558173] [2020-08-18 11:25:45,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 11:25:45,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 11:25:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 11:25:45,232 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-18 11:25:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:46,764 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-18 11:25:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 11:25:46,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-18 11:25:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:46,790 INFO L225 Difference]: With dead ends: 9674 [2020-08-18 11:25:46,790 INFO L226 Difference]: Without dead ends: 5398 [2020-08-18 11:25:46,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 11:25:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-18 11:25:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-18 11:25:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-18 11:25:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-18 11:25:46,913 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-18 11:25:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:46,915 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-18 11:25:46,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 11:25:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-18 11:25:46,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-18 11:25:46,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:46,937 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:46,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 11:25:46,937 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:46,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-18 11:25:46,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:46,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77236905] [2020-08-18 11:25:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 11:25:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-18 11:25:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-18 11:25:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:47,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-18 11:25:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-18 11:25:48,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77236905] [2020-08-18 11:25:48,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:48,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:25:48,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390225402] [2020-08-18 11:25:48,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:25:48,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:25:48,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:25:48,738 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-18 11:25:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:51,589 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-18 11:25:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 11:25:51,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-18 11:25:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:51,614 INFO L225 Difference]: With dead ends: 11142 [2020-08-18 11:25:51,614 INFO L226 Difference]: Without dead ends: 6124 [2020-08-18 11:25:51,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-18 11:25:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-18 11:25:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-18 11:25:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-18 11:25:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-18 11:25:51,776 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-18 11:25:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:51,777 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-18 11:25:51,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:25:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-18 11:25:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-18 11:25:51,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:51,797 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:51,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 11:25:51,798 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-18 11:25:51,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:51,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701398866] [2020-08-18 11:25:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:51,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:52,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:52,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:52,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:52,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:52,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 11:25:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:52,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-18 11:25:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:52,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-18 11:25:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-18 11:25:53,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701398866] [2020-08-18 11:25:53,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:53,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 11:25:53,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304214864] [2020-08-18 11:25:53,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 11:25:53,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:53,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 11:25:53,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 11:25:53,336 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-18 11:25:56,101 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-08-18 11:25:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:25:56,881 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-18 11:25:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 11:25:56,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-18 11:25:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:25:56,903 INFO L225 Difference]: With dead ends: 11324 [2020-08-18 11:25:56,903 INFO L226 Difference]: Without dead ends: 5758 [2020-08-18 11:25:56,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 11:25:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-18 11:25:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-18 11:25:57,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-18 11:25:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-18 11:25:57,036 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-18 11:25:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:25:57,037 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-18 11:25:57,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 11:25:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-18 11:25:57,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-18 11:25:57,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:25:57,060 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:25:57,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 11:25:57,061 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:25:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:25:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-18 11:25:57,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:25:57,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715736839] [2020-08-18 11:25:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:25:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:25:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:25:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:25:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:25:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:25:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 11:25:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-18 11:25:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:57,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-18 11:25:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:25:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-18 11:25:58,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715736839] [2020-08-18 11:25:58,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:25:58,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:25:58,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870453797] [2020-08-18 11:25:58,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:25:58,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:25:58,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:25:58,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:25:58,135 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-18 11:26:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:26:01,381 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-18 11:26:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 11:26:01,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-18 11:26:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:26:01,401 INFO L225 Difference]: With dead ends: 13170 [2020-08-18 11:26:01,401 INFO L226 Difference]: Without dead ends: 7602 [2020-08-18 11:26:01,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-18 11:26:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-18 11:26:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-18 11:26:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-18 11:26:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-18 11:26:01,565 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-18 11:26:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:26:01,566 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-18 11:26:01,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 11:26:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-18 11:26:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-18 11:26:01,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:26:01,597 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-08-18 11:26:01,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 11:26:01,598 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:26:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:26:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-18 11:26:01,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:26:01,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680422794] [2020-08-18 11:26:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:26:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:26:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:01,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 11:26:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 11:26:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 11:26:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 11:26:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 11:26:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 11:26:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-18 11:26:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-18 11:26:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:02,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-18 11:26:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:26:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-18 11:26:03,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680422794] [2020-08-18 11:26:03,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 11:26:03,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 11:26:03,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937190437] [2020-08-18 11:26:03,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 11:26:03,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:26:03,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 11:26:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 11:26:03,384 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states.