/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -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 [2020-08-19 01:13:55,221 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 01:13:55,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:13:55,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:13:55,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:13:55,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:13:55,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:13:55,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:13:55,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:13:55,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:13:55,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:13:55,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:13:55,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:13:55,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:13:55,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:13:55,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:13:55,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:13:55,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:13:55,341 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 [2020-08-19 01:13:55,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:13:55,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:13:55,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:13:55,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:13:55,388 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:13:55,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:13:55,389 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:13:55,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:13:55,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:13:55,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:13:55,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:13:55,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:13:55,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:13:55,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:13:55,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:13:55,391 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:13:55,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:13:55,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:13:55,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:13:55,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:13:55,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:13:55,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:13:55,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:13:55,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:13:55,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:13:55,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:13:55,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:13:55,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:13:55,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:13:55,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:13:55,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:13:55,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:13:55,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:13:55,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:13:55,721 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:13:55,721 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-19 01:13:55,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae0e6c41e/eff960d8db7648fbadbf0d90c52d536b/FLAGb971170ec [2020-08-19 01:13:56,407 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:13:56,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-19 01:13:56,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae0e6c41e/eff960d8db7648fbadbf0d90c52d536b/FLAGb971170ec [2020-08-19 01:13:56,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ae0e6c41e/eff960d8db7648fbadbf0d90c52d536b [2020-08-19 01:13:56,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:13:56,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:13:56,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:13:56,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:13:56,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:13:56,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:13:56" (1/1) ... [2020-08-19 01:13:56,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b9b7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:56, skipping insertion in model container [2020-08-19 01:13:56,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:13:56" (1/1) ... [2020-08-19 01:13:56,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:13:56,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:13:57,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:13:57,336 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:13:57,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:13:57,571 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:13:57,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57 WrapperNode [2020-08-19 01:13:57,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:13:57,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:13:57,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:13:57,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:13:57,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (1/1) ... [2020-08-19 01:13:57,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (1/1) ... [2020-08-19 01:13:57,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (1/1) ... [2020-08-19 01:13:57,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (1/1) ... [2020-08-19 01:13:57,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (1/1) ... [2020-08-19 01:13:57,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (1/1) ... [2020-08-19 01:13:57,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (1/1) ... [2020-08-19 01:13:57,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:13:57,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:13:57,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:13:57,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:13:57,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (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 [2020-08-19 01:13:57,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:13:57,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:13:57,853 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-19 01:13:57,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:13:57,854 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-19 01:13:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:13:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:13:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-19 01:13:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:13:57,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:13:57,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:13:59,639 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:13:59,640 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 01:13:59,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:13:59 BoogieIcfgContainer [2020-08-19 01:13:59,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:13:59,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:13:59,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:13:59,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:13:59,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:13:56" (1/3) ... [2020-08-19 01:13:59,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1e5951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:13:59, skipping insertion in model container [2020-08-19 01:13:59,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:13:57" (2/3) ... [2020-08-19 01:13:59,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f1e5951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:13:59, skipping insertion in model container [2020-08-19 01:13:59,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:13:59" (3/3) ... [2020-08-19 01:13:59,656 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-19 01:13:59,670 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:13:59,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:13:59,696 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:13:59,727 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:13:59,727 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:13:59,727 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:13:59,727 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:13:59,727 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:13:59,728 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:13:59,728 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:13:59,728 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:13:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-19 01:13:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 01:13:59,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:13:59,768 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] [2020-08-19 01:13:59,769 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:13:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:13:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-19 01:13:59,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:13:59,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482870192] [2020-08-19 01:13:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:13:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:00,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:14:00,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482870192] [2020-08-19 01:14:00,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:14:00,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 01:14:00,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014685486] [2020-08-19 01:14:00,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:14:00,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:14:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:14:00,267 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-19 01:14:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:03,290 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-19 01:14:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:14:03,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-19 01:14:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:03,317 INFO L225 Difference]: With dead ends: 886 [2020-08-19 01:14:03,318 INFO L226 Difference]: Without dead ends: 564 [2020-08-19 01:14:03,328 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 [2020-08-19 01:14:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-19 01:14:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-19 01:14:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-19 01:14:03,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-19 01:14:03,449 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-19 01:14:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:03,449 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-19 01:14:03,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:14:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-19 01:14:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 01:14:03,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:03,458 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] [2020-08-19 01:14:03,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:14:03,458 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:03,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-19 01:14:03,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:03,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660118410] [2020-08-19 01:14:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:03,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:03,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:14:03,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660118410] [2020-08-19 01:14:03,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:14:03,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 01:14:03,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351819207] [2020-08-19 01:14:03,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:14:03,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:03,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:14:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:14:03,742 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-19 01:14:05,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:05,852 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-19 01:14:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:14:05,853 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-19 01:14:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:05,864 INFO L225 Difference]: With dead ends: 1320 [2020-08-19 01:14:05,864 INFO L226 Difference]: Without dead ends: 768 [2020-08-19 01:14:05,866 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 [2020-08-19 01:14:05,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-19 01:14:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-19 01:14:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-19 01:14:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-19 01:14:05,905 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-19 01:14:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:05,906 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-19 01:14:05,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:14:05,906 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-19 01:14:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-19 01:14:05,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:05,919 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] [2020-08-19 01:14:05,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:14:05,919 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:05,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-19 01:14:05,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:05,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620657500] [2020-08-19 01:14:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:06,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:06,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:14:06,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620657500] [2020-08-19 01:14:06,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:14:06,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 01:14:06,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766113383] [2020-08-19 01:14:06,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:14:06,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:14:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:14:06,253 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-19 01:14:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:08,182 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-19 01:14:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:14:08,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-19 01:14:08,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:08,193 INFO L225 Difference]: With dead ends: 1330 [2020-08-19 01:14:08,194 INFO L226 Difference]: Without dead ends: 770 [2020-08-19 01:14:08,195 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 [2020-08-19 01:14:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-19 01:14:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-19 01:14:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-19 01:14:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-19 01:14:08,225 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-19 01:14:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:08,226 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-19 01:14:08,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:14:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-19 01:14:08,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-19 01:14:08,232 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:08,232 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] [2020-08-19 01:14:08,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:14:08,233 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:08,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-19 01:14:08,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:08,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876960266] [2020-08-19 01:14:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:08,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:08,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:08,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 01:14:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-19 01:14:08,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876960266] [2020-08-19 01:14:08,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:08,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 01:14:08,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425130477] [2020-08-19 01:14:08,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:14:08,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:08,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:14:08,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:14:08,463 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-19 01:14:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:10,402 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-19 01:14:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:14:10,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-19 01:14:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:10,415 INFO L225 Difference]: With dead ends: 2246 [2020-08-19 01:14:10,416 INFO L226 Difference]: Without dead ends: 1498 [2020-08-19 01:14:10,420 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 [2020-08-19 01:14:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-19 01:14:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-19 01:14:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-19 01:14:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-19 01:14:10,484 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-19 01:14:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:10,487 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-19 01:14:10,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:14:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-19 01:14:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-19 01:14:10,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:10,496 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] [2020-08-19 01:14:10,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:14:10,497 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-19 01:14:10,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:10,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588240014] [2020-08-19 01:14:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:10,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:10,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:10,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 01:14:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:11,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-19 01:14:11,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 01:14:11,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588240014] [2020-08-19 01:14:11,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:11,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:14:11,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206858692] [2020-08-19 01:14:11,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:14:11,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:14:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:14:11,364 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-19 01:14:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:14,435 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-19 01:14:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 01:14:14,435 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-19 01:14:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:14,447 INFO L225 Difference]: With dead ends: 3081 [2020-08-19 01:14:14,447 INFO L226 Difference]: Without dead ends: 1734 [2020-08-19 01:14:14,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-19 01:14:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-19 01:14:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-19 01:14:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-19 01:14:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-19 01:14:14,515 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-19 01:14:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:14,516 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-19 01:14:14,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:14:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-19 01:14:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-19 01:14:14,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:14,526 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] [2020-08-19 01:14:14,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:14:14,526 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:14,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:14,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-19 01:14:14,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:14,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522578334] [2020-08-19 01:14:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:14,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:14,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 01:14:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:14,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-19 01:14:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-19 01:14:15,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522578334] [2020-08-19 01:14:15,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:15,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:14:15,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816715499] [2020-08-19 01:14:15,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:14:15,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:14:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:14:15,351 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-19 01:14:17,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:17,611 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-19 01:14:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:14:17,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-19 01:14:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:17,622 INFO L225 Difference]: With dead ends: 3607 [2020-08-19 01:14:17,622 INFO L226 Difference]: Without dead ends: 1923 [2020-08-19 01:14:17,627 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 [2020-08-19 01:14:17,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-19 01:14:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-19 01:14:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-19 01:14:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-19 01:14:17,686 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-19 01:14:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:17,686 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-19 01:14:17,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:14:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-19 01:14:17,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-19 01:14:17,694 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:17,695 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] [2020-08-19 01:14:17,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:14:17,695 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:17,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-19 01:14:17,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:17,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984529082] [2020-08-19 01:14:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:17,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:17,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:17,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-19 01:14:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:18,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-19 01:14:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-19 01:14:18,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984529082] [2020-08-19 01:14:18,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:18,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:14:18,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97011158] [2020-08-19 01:14:18,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:14:18,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:14:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:14:18,241 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-19 01:14:21,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:21,762 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-19 01:14:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 01:14:21,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-19 01:14:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:21,781 INFO L225 Difference]: With dead ends: 5807 [2020-08-19 01:14:21,781 INFO L226 Difference]: Without dead ends: 3550 [2020-08-19 01:14:21,789 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 [2020-08-19 01:14:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-19 01:14:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-19 01:14:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-19 01:14:21,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-19 01:14:21,876 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-19 01:14:21,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:21,876 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-19 01:14:21,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:14:21,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-19 01:14:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-19 01:14:21,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:21,895 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] [2020-08-19 01:14:21,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:14:21,895 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-19 01:14:21,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:21,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993909911] [2020-08-19 01:14:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:22,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:22,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:22,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:22,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:22,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-19 01:14:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:22,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-19 01:14:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-19 01:14:22,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993909911] [2020-08-19 01:14:22,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:22,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:14:22,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173369823] [2020-08-19 01:14:22,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:14:22,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:14:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:14:22,640 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-19 01:14:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:24,258 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-19 01:14:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:14:24,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-19 01:14:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:24,276 INFO L225 Difference]: With dead ends: 6928 [2020-08-19 01:14:24,276 INFO L226 Difference]: Without dead ends: 3938 [2020-08-19 01:14:24,284 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 [2020-08-19 01:14:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-19 01:14:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-19 01:14:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-19 01:14:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-19 01:14:24,396 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-19 01:14:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:24,398 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-19 01:14:24,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:14:24,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-19 01:14:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-19 01:14:24,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:24,451 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] [2020-08-19 01:14:24,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:14:24,452 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-19 01:14:24,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:24,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860988896] [2020-08-19 01:14:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:24,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:24,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:24,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:24,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:24,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 01:14:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:24,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-19 01:14:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-19 01:14:25,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860988896] [2020-08-19 01:14:25,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:25,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:14:25,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606596623] [2020-08-19 01:14:25,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:14:25,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:25,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:14:25,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:14:25,126 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-19 01:14:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:26,912 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-19 01:14:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:14:26,912 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-19 01:14:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:26,935 INFO L225 Difference]: With dead ends: 8034 [2020-08-19 01:14:26,935 INFO L226 Difference]: Without dead ends: 4484 [2020-08-19 01:14:26,943 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 [2020-08-19 01:14:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-19 01:14:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-19 01:14:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-19 01:14:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-19 01:14:27,075 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-19 01:14:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:27,076 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-19 01:14:27,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:14:27,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-19 01:14:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-19 01:14:27,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:27,094 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] [2020-08-19 01:14:27,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:14:27,095 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-19 01:14:27,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:27,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39948624] [2020-08-19 01:14:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-19 01:14:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-19 01:14:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-19 01:14:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:27,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-19 01:14:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-19 01:14:28,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39948624] [2020-08-19 01:14:28,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:28,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:14:28,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290054587] [2020-08-19 01:14:28,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:14:28,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:28,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:14:28,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:14:28,369 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-19 01:14:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:30,204 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-19 01:14:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:14:30,205 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-19 01:14:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:30,222 INFO L225 Difference]: With dead ends: 8817 [2020-08-19 01:14:30,222 INFO L226 Difference]: Without dead ends: 4494 [2020-08-19 01:14:30,233 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 [2020-08-19 01:14:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-19 01:14:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-19 01:14:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-19 01:14:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-19 01:14:30,329 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-19 01:14:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:30,330 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-19 01:14:30,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:14:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-19 01:14:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-19 01:14:30,348 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:30,349 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] [2020-08-19 01:14:30,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:14:30,349 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-19 01:14:30,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:30,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064501194] [2020-08-19 01:14:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:30,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:30,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:30,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:30,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:30,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 01:14:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:30,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-19 01:14:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:30,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-19 01:14:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-19 01:14:31,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064501194] [2020-08-19 01:14:31,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:31,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 01:14:31,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350733816] [2020-08-19 01:14:31,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 01:14:31,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:31,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 01:14:31,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:14:31,225 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-19 01:14:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:32,871 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-19 01:14:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:14:32,879 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-19 01:14:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:32,911 INFO L225 Difference]: With dead ends: 9674 [2020-08-19 01:14:32,912 INFO L226 Difference]: Without dead ends: 5398 [2020-08-19 01:14:32,923 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 [2020-08-19 01:14:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-19 01:14:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-19 01:14:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-19 01:14:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-19 01:14:33,080 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-19 01:14:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:33,082 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-19 01:14:33,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 01:14:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-19 01:14:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-19 01:14:33,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:33,100 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] [2020-08-19 01:14:33,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:14:33,101 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-19 01:14:33,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:33,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470986127] [2020-08-19 01:14:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-19 01:14:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-19 01:14:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-19 01:14:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:33,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-19 01:14:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-19 01:14:34,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470986127] [2020-08-19 01:14:34,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:34,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:14:34,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306696285] [2020-08-19 01:14:34,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:14:34,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:14:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:14:34,463 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-19 01:14:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:38,007 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-19 01:14:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 01:14:38,011 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-19 01:14:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:38,029 INFO L225 Difference]: With dead ends: 11142 [2020-08-19 01:14:38,029 INFO L226 Difference]: Without dead ends: 6124 [2020-08-19 01:14:38,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-19 01:14:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-19 01:14:38,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-19 01:14:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-19 01:14:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-19 01:14:38,151 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-19 01:14:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:38,152 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-19 01:14:38,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:14:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-19 01:14:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-19 01:14:38,171 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:38,172 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] [2020-08-19 01:14:38,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:14:38,172 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-19 01:14:38,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:38,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750158682] [2020-08-19 01:14:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:38,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:38,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:38,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:38,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 01:14:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:39,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-19 01:14:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:39,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-19 01:14:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:39,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-19 01:14:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-19 01:14:39,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750158682] [2020-08-19 01:14:39,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:39,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 01:14:39,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98875733] [2020-08-19 01:14:39,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 01:14:39,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:39,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 01:14:39,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-19 01:14:39,946 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-19 01:14:40,508 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-08-19 01:14:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:43,534 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-19 01:14:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 01:14:43,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-19 01:14:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:43,550 INFO L225 Difference]: With dead ends: 11324 [2020-08-19 01:14:43,551 INFO L226 Difference]: Without dead ends: 5758 [2020-08-19 01:14:43,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-19 01:14:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-19 01:14:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-19 01:14:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-19 01:14:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-19 01:14:43,660 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-19 01:14:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:43,661 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-19 01:14:43,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 01:14:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-19 01:14:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-19 01:14:43,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:43,681 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] [2020-08-19 01:14:43,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:14:43,682 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:43,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-19 01:14:43,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:43,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083900482] [2020-08-19 01:14:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:43,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:43,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:44,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:44,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 01:14:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:44,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-19 01:14:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:44,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-19 01:14:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:44,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-19 01:14:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-19 01:14:44,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083900482] [2020-08-19 01:14:44,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:44,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:14:44,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47396719] [2020-08-19 01:14:44,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:14:44,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:44,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:14:44,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:14:44,689 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-19 01:14:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:47,944 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-19 01:14:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 01:14:47,951 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-19 01:14:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:47,974 INFO L225 Difference]: With dead ends: 13170 [2020-08-19 01:14:47,975 INFO L226 Difference]: Without dead ends: 7602 [2020-08-19 01:14:47,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-19 01:14:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-19 01:14:48,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-19 01:14:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-19 01:14:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-19 01:14:48,123 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-19 01:14:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:48,124 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-19 01:14:48,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:14:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-19 01:14:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-19 01:14:48,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:48,156 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] [2020-08-19 01:14:48,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:14:48,157 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:48,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:48,158 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-19 01:14:48,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:48,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643642166] [2020-08-19 01:14:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 01:14:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-19 01:14:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-19 01:14:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-19 01:14:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-19 01:14:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:48,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-19 01:14:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-19 01:14:49,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643642166] [2020-08-19 01:14:49,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:49,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 01:14:49,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912198100] [2020-08-19 01:14:49,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 01:14:49,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:49,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 01:14:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-19 01:14:49,600 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-19 01:14:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:14:52,529 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-19 01:14:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 01:14:52,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-19 01:14:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:14:52,565 INFO L225 Difference]: With dead ends: 17064 [2020-08-19 01:14:52,565 INFO L226 Difference]: Without dead ends: 9836 [2020-08-19 01:14:52,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-08-19 01:14:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-19 01:14:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-19 01:14:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-19 01:14:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-19 01:14:52,812 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-19 01:14:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:14:52,813 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-19 01:14:52,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 01:14:52,814 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions. [2020-08-19 01:14:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2020-08-19 01:14:52,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:14:52,875 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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, 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, 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] [2020-08-19 01:14:52,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 01:14:52,876 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:14:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:14:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash 166705873, now seen corresponding path program 1 times [2020-08-19 01:14:52,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:14:52,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268880233] [2020-08-19 01:14:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:14:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:14:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-19 01:14:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 01:14:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-19 01:14:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-19 01:14:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-19 01:14:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-19 01:14:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-19 01:14:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 707 [2020-08-19 01:14:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2020-08-19 01:14:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:53,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1029 [2020-08-19 01:14:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:14:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4471 backedges. 1117 proven. 1250 refuted. 0 times theorem prover too weak. 2104 trivial. 0 not checked. [2020-08-19 01:14:54,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268880233] [2020-08-19 01:14:54,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:14:54,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 01:14:54,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847619379] [2020-08-19 01:14:54,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 01:14:54,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:14:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 01:14:54,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-19 01:14:54,554 INFO L87 Difference]: Start difference. First operand 8722 states and 9968 transitions. Second operand 12 states.