/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:36:54,032 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 16:36:54,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:36:54,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:36:54,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:36:54,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:36:54,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:36:54,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:36:54,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:36:54,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:36:54,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:36:54,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:36:54,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:36:54,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:36:54,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:36:54,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:36:54,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:36:54,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:36:54,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:36:54,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:36:54,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:36:54,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:36:54,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 16:36:54,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:36:54,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:36:54,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:36:54,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:36:54,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:36:54,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:36:54,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:36:54,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:36:54,199 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:36:54,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:36:54,199 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:36:54,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:36:54,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:36:54,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:36:54,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:36:54,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:36:54,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:36:54,202 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:36:54,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:36:54,202 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:36:54,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:36:54,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:36:54,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:36:54,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:36:54,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:36:54,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:36:54,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:36:54,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:36:54,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:36:54,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:36:54,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:36:54,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:36:54,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:36:54,205 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:36:54,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:36:54,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:36:54,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:36:54,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:36:54,530 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:36:54,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-21 16:36:54,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f80f4effa/98de72e72726456dae912d4e50db6dad/FLAGd0ace3287 [2020-08-21 16:36:55,244 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:36:55,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-21 16:36:55,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f80f4effa/98de72e72726456dae912d4e50db6dad/FLAGd0ace3287 [2020-08-21 16:36:55,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f80f4effa/98de72e72726456dae912d4e50db6dad [2020-08-21 16:36:55,473 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:36:55,474 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:36:55,475 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:36:55,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:36:55,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:36:55,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:36:55" (1/1) ... [2020-08-21 16:36:55,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2939e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:55, skipping insertion in model container [2020-08-21 16:36:55,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:36:55" (1/1) ... [2020-08-21 16:36:55,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:36:55,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:36:56,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:36:56,087 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:36:56,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:36:56,234 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:36:56,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56 WrapperNode [2020-08-21 16:36:56,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:36:56,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:36:56,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:36:56,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:36:56,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... [2020-08-21 16:36:56,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... [2020-08-21 16:36:56,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... [2020-08-21 16:36:56,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... [2020-08-21 16:36:56,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... [2020-08-21 16:36:56,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... [2020-08-21 16:36:56,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... [2020-08-21 16:36:56,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:36:56,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:36:56,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:36:56,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:36:56,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:36:56,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:36:56,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:36:56,455 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-21 16:36:56,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:36:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-21 16:36:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:36:56,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:36:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 16:36:56,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:36:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:36:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:36:58,116 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:36:58,117 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:36:58,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:36:58 BoogieIcfgContainer [2020-08-21 16:36:58,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:36:58,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:36:58,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:36:58,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:36:58,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:36:55" (1/3) ... [2020-08-21 16:36:58,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230539e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:36:58, skipping insertion in model container [2020-08-21 16:36:58,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:36:56" (2/3) ... [2020-08-21 16:36:58,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230539e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:36:58, skipping insertion in model container [2020-08-21 16:36:58,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:36:58" (3/3) ... [2020-08-21 16:36:58,133 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-21 16:36:58,144 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:36:58,152 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:36:58,166 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:36:58,196 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:36:58,196 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:36:58,196 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:36:58,196 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:36:58,196 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:36:58,197 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:36:58,197 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:36:58,197 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:36:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-21 16:36:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 16:36:58,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:36:58,230 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] [2020-08-21 16:36:58,231 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:36:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:36:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-21 16:36:58,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:36:58,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750922330] [2020-08-21 16:36:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:36:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:36:58,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:36:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:36:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:36:58,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750922330] [2020-08-21 16:36:58,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:36:58,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:36:58,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283564989] [2020-08-21 16:36:58,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:36:58,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:36:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:36:58,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:36:58,674 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-21 16:37:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:01,489 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-21 16:37:01,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:37:01,494 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-21 16:37:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:01,533 INFO L225 Difference]: With dead ends: 886 [2020-08-21 16:37:01,539 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 16:37:01,554 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 [2020-08-21 16:37:01,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 16:37:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-21 16:37:01,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-21 16:37:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-21 16:37:01,666 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-21 16:37:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:01,666 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-21 16:37:01,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:37:01,667 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-21 16:37:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 16:37:01,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:01,674 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] [2020-08-21 16:37:01,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:37:01,674 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-21 16:37:01,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:01,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929386813] [2020-08-21 16:37:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:01,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:01,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:37:01,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929386813] [2020-08-21 16:37:01,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:37:01,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:37:01,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923127492] [2020-08-21 16:37:01,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:37:01,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:01,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:37:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:37:01,957 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-21 16:37:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:03,918 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-21 16:37:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:37:03,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-21 16:37:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:03,926 INFO L225 Difference]: With dead ends: 1320 [2020-08-21 16:37:03,926 INFO L226 Difference]: Without dead ends: 768 [2020-08-21 16:37:03,929 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 [2020-08-21 16:37:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-21 16:37:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-21 16:37:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-21 16:37:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-21 16:37:03,997 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-21 16:37:03,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:03,999 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-21 16:37:03,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:37:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-21 16:37:04,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-21 16:37:04,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:04,010 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] [2020-08-21 16:37:04,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:37:04,011 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:04,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-21 16:37:04,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:04,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73629276] [2020-08-21 16:37:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:04,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:04,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:37:04,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73629276] [2020-08-21 16:37:04,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:37:04,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:37:04,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192762419] [2020-08-21 16:37:04,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:37:04,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:04,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:37:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:37:04,372 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-21 16:37:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:06,268 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-21 16:37:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:37:06,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-21 16:37:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:06,274 INFO L225 Difference]: With dead ends: 1330 [2020-08-21 16:37:06,274 INFO L226 Difference]: Without dead ends: 770 [2020-08-21 16:37:06,276 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 [2020-08-21 16:37:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-21 16:37:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-21 16:37:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-21 16:37:06,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-21 16:37:06,304 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-21 16:37:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:06,305 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-21 16:37:06,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:37:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-21 16:37:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-21 16:37:06,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:06,310 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] [2020-08-21 16:37:06,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:37:06,311 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:06,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-21 16:37:06,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:06,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472598940] [2020-08-21 16:37:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:06,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:06,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:06,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 16:37:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-21 16:37:06,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472598940] [2020-08-21 16:37:06,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:06,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 16:37:06,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867715607] [2020-08-21 16:37:06,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:37:06,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:37:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:37:06,603 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-21 16:37:08,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:08,310 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-21 16:37:08,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:37:08,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-21 16:37:08,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:08,322 INFO L225 Difference]: With dead ends: 2246 [2020-08-21 16:37:08,322 INFO L226 Difference]: Without dead ends: 1498 [2020-08-21 16:37:08,325 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 [2020-08-21 16:37:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-21 16:37:08,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-21 16:37:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-21 16:37:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-21 16:37:08,366 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-21 16:37:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:08,367 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-21 16:37:08,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:37:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-21 16:37:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-21 16:37:08,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:08,373 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] [2020-08-21 16:37:08,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:37:08,374 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:08,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-21 16:37:08,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:08,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820197068] [2020-08-21 16:37:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:08,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:08,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:08,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 16:37:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:08,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-21 16:37:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 16:37:09,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820197068] [2020-08-21 16:37:09,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:09,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:37:09,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212397915] [2020-08-21 16:37:09,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:37:09,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:09,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:37:09,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:37:09,017 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-21 16:37:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:11,646 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-21 16:37:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:37:11,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-21 16:37:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:11,658 INFO L225 Difference]: With dead ends: 3081 [2020-08-21 16:37:11,658 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 16:37:11,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:37:11,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 16:37:11,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-21 16:37:11,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-21 16:37:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-21 16:37:11,718 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-21 16:37:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:11,718 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-21 16:37:11,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:37:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-21 16:37:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-21 16:37:11,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:11,725 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] [2020-08-21 16:37:11,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:37:11,726 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:11,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-21 16:37:11,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:11,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677192179] [2020-08-21 16:37:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:11,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:11,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:11,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-21 16:37:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:12,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-21 16:37:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-21 16:37:12,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677192179] [2020-08-21 16:37:12,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:12,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 16:37:12,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151930444] [2020-08-21 16:37:12,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:37:12,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:12,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:37:12,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:37:12,502 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-21 16:37:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:14,609 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-21 16:37:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:37:14,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-21 16:37:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:14,620 INFO L225 Difference]: With dead ends: 3607 [2020-08-21 16:37:14,621 INFO L226 Difference]: Without dead ends: 1923 [2020-08-21 16:37:14,625 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 [2020-08-21 16:37:14,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-21 16:37:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-21 16:37:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-21 16:37:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-21 16:37:14,686 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-21 16:37:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:14,687 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-21 16:37:14,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:37:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-21 16:37:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-21 16:37:14,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:14,697 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] [2020-08-21 16:37:14,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:37:14,699 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:14,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:14,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-21 16:37:14,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:14,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382446400] [2020-08-21 16:37:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:14,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:14,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:15,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-21 16:37:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:15,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-21 16:37:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-21 16:37:15,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382446400] [2020-08-21 16:37:15,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:15,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:37:15,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946873865] [2020-08-21 16:37:15,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:37:15,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:37:15,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:37:15,333 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-21 16:37:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:19,011 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-21 16:37:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 16:37:19,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-21 16:37:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:19,036 INFO L225 Difference]: With dead ends: 5807 [2020-08-21 16:37:19,036 INFO L226 Difference]: Without dead ends: 3550 [2020-08-21 16:37:19,043 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 [2020-08-21 16:37:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-21 16:37:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-21 16:37:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-21 16:37:19,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-21 16:37:19,140 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-21 16:37:19,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:19,140 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-21 16:37:19,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:37:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-21 16:37:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-21 16:37:19,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:19,157 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] [2020-08-21 16:37:19,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:37:19,157 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-21 16:37:19,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:19,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338277259] [2020-08-21 16:37:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:19,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:19,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:19,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:19,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-21 16:37:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:19,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-21 16:37:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-21 16:37:19,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338277259] [2020-08-21 16:37:19,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:19,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:37:19,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235624090] [2020-08-21 16:37:19,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:37:19,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:19,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:37:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:37:19,990 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-21 16:37:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:21,573 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-21 16:37:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:37:21,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-21 16:37:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:21,590 INFO L225 Difference]: With dead ends: 6928 [2020-08-21 16:37:21,590 INFO L226 Difference]: Without dead ends: 3938 [2020-08-21 16:37:21,597 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 [2020-08-21 16:37:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-21 16:37:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-21 16:37:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-21 16:37:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-21 16:37:21,689 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-21 16:37:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:21,691 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-21 16:37:21,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:37:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-21 16:37:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-21 16:37:21,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:21,702 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] [2020-08-21 16:37:21,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:37:21,702 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-21 16:37:21,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:21,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557594331] [2020-08-21 16:37:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:21,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:21,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:21,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:21,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:22,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 16:37:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:22,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-21 16:37:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-21 16:37:22,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557594331] [2020-08-21 16:37:22,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:22,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:37:22,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199342235] [2020-08-21 16:37:22,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:37:22,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:37:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:37:22,548 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-21 16:37:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:24,181 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-21 16:37:24,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:37:24,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-21 16:37:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:24,200 INFO L225 Difference]: With dead ends: 8034 [2020-08-21 16:37:24,200 INFO L226 Difference]: Without dead ends: 4484 [2020-08-21 16:37:24,207 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 [2020-08-21 16:37:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-21 16:37:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-21 16:37:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-21 16:37:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-21 16:37:24,315 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-21 16:37:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:24,316 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-21 16:37:24,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:37:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-21 16:37:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-21 16:37:24,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:24,333 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] [2020-08-21 16:37:24,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:37:24,333 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-21 16:37:24,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:24,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314236614] [2020-08-21 16:37:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-21 16:37:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-21 16:37:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-21 16:37:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:24,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-21 16:37:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-21 16:37:25,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314236614] [2020-08-21 16:37:25,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:25,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:37:25,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081625915] [2020-08-21 16:37:25,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:37:25,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:37:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:37:25,625 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-21 16:37:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:27,444 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-21 16:37:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:37:27,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-21 16:37:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:27,463 INFO L225 Difference]: With dead ends: 8817 [2020-08-21 16:37:27,463 INFO L226 Difference]: Without dead ends: 4494 [2020-08-21 16:37:27,473 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 [2020-08-21 16:37:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-21 16:37:27,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-21 16:37:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-21 16:37:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-21 16:37:27,570 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-21 16:37:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:27,571 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-21 16:37:27,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:37:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-21 16:37:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-21 16:37:27,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:27,588 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] [2020-08-21 16:37:27,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:37:27,588 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-21 16:37:27,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:27,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289303785] [2020-08-21 16:37:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:27,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:27,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:27,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:27,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 16:37:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:28,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 16:37:28,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:28,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-21 16:37:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:28,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-21 16:37:28,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289303785] [2020-08-21 16:37:28,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:28,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:37:28,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027914073] [2020-08-21 16:37:28,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:37:28,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:37:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:37:28,647 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-21 16:37:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:30,136 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-21 16:37:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:37:30,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-21 16:37:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:30,159 INFO L225 Difference]: With dead ends: 9674 [2020-08-21 16:37:30,159 INFO L226 Difference]: Without dead ends: 5398 [2020-08-21 16:37:30,169 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 [2020-08-21 16:37:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-21 16:37:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-21 16:37:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-21 16:37:30,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-21 16:37:30,277 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-21 16:37:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:30,278 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-21 16:37:30,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:37:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-21 16:37:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-21 16:37:30,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:30,294 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] [2020-08-21 16:37:30,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:37:30,295 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:30,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-21 16:37:30,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:30,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457699891] [2020-08-21 16:37:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-21 16:37:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-21 16:37:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-21 16:37:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:30,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-21 16:37:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-21 16:37:31,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457699891] [2020-08-21 16:37:31,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:31,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:37:31,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699701501] [2020-08-21 16:37:31,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:37:31,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:31,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:37:31,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:37:31,576 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-21 16:37:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:34,358 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-21 16:37:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:37:34,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-21 16:37:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:34,377 INFO L225 Difference]: With dead ends: 11142 [2020-08-21 16:37:34,377 INFO L226 Difference]: Without dead ends: 6124 [2020-08-21 16:37:34,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-21 16:37:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-21 16:37:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-21 16:37:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-21 16:37:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-21 16:37:34,489 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-21 16:37:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:34,491 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-21 16:37:34,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:37:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-21 16:37:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-21 16:37:34,511 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:34,512 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] [2020-08-21 16:37:34,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:37:34,512 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-21 16:37:34,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:34,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703998449] [2020-08-21 16:37:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:34,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:34,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:34,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:34,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 16:37:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:35,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-21 16:37:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:35,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-21 16:37:35,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:35,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-21 16:37:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-21 16:37:35,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703998449] [2020-08-21 16:37:35,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:35,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:37:35,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700948402] [2020-08-21 16:37:35,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:37:35,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:37:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:37:35,861 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-21 16:37:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:39,444 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-21 16:37:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 16:37:39,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-21 16:37:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:39,458 INFO L225 Difference]: With dead ends: 11324 [2020-08-21 16:37:39,458 INFO L226 Difference]: Without dead ends: 5758 [2020-08-21 16:37:39,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-21 16:37:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-21 16:37:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-21 16:37:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-21 16:37:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-21 16:37:39,584 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-21 16:37:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:39,585 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-21 16:37:39,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:37:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-21 16:37:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-21 16:37:39,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:39,611 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] [2020-08-21 16:37:39,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:37:39,612 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-21 16:37:39,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:39,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321637069] [2020-08-21 16:37:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:39,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:39,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:40,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:40,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 16:37:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:40,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 16:37:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:40,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-21 16:37:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:40,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-21 16:37:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-21 16:37:40,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321637069] [2020-08-21 16:37:40,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:40,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:37:40,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112110291] [2020-08-21 16:37:40,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:37:40,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:37:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:37:40,793 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-21 16:37:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:44,100 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-21 16:37:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 16:37:44,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-21 16:37:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:44,121 INFO L225 Difference]: With dead ends: 13170 [2020-08-21 16:37:44,121 INFO L226 Difference]: Without dead ends: 7602 [2020-08-21 16:37:44,133 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 [2020-08-21 16:37:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-21 16:37:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-21 16:37:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-21 16:37:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-21 16:37:44,288 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-21 16:37:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:44,290 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-21 16:37:44,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:37:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-21 16:37:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-21 16:37:44,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:44,319 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] [2020-08-21 16:37:44,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:37:44,320 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-21 16:37:44,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:44,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879486637] [2020-08-21 16:37:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 16:37:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-21 16:37:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-21 16:37:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-21 16:37:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-21 16:37:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-21 16:37:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-21 16:37:45,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879486637] [2020-08-21 16:37:45,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:45,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:37:45,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087585555] [2020-08-21 16:37:45,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:37:45,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:37:45,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:37:45,555 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-21 16:37:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:37:48,513 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-21 16:37:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 16:37:48,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-21 16:37:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:37:48,555 INFO L225 Difference]: With dead ends: 17064 [2020-08-21 16:37:48,555 INFO L226 Difference]: Without dead ends: 9836 [2020-08-21 16:37:48,571 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 [2020-08-21 16:37:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-21 16:37:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-21 16:37:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-21 16:37:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-21 16:37:48,751 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-21 16:37:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:37:48,752 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-21 16:37:48,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:37:48,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions. [2020-08-21 16:37:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2020-08-21 16:37:48,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:37:48,790 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] [2020-08-21 16:37:48,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:37:48,791 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:37:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:37:48,792 INFO L82 PathProgramCache]: Analyzing trace with hash 166705873, now seen corresponding path program 1 times [2020-08-21 16:37:48,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:37:48,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554225800] [2020-08-21 16:37:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:37:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:48,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:37:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 16:37:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 16:37:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 16:37:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 16:37:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-21 16:37:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-21 16:37:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-21 16:37:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 707 [2020-08-21 16:37:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2020-08-21 16:37:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:49,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1029 [2020-08-21 16:37:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:37:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4471 backedges. 1117 proven. 1250 refuted. 0 times theorem prover too weak. 2104 trivial. 0 not checked. [2020-08-21 16:37:50,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554225800] [2020-08-21 16:37:50,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:37:50,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 16:37:50,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618088947] [2020-08-21 16:37:50,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:37:50,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:37:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:37:50,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:37:50,216 INFO L87 Difference]: Start difference. First operand 8722 states and 9968 transitions. Second operand 12 states.