/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:01:32,911 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 13:01:32,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:01:32,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:01:32,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:01:32,974 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 13:01:32,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:01:32,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:01:32,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:01:32,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:01:32,998 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:01:32,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:01:32,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:01:32,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:01:32,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:01:32,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:01:33,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:01:33,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:01:33,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:01:33,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:01:33,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:01:33,000 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:01:33,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:01:33,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:01:33,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:01:33,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:01:33,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:01:33,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:01:33,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:01:33,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:01:33,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:01:33,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:01:33,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:01:33,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:01:33,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:01:33,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:01:33,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:01:33,326 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:01:33,330 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:01:33,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:01:33,332 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:01:33,333 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 13:01:33,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce5ee232/538ec470dcde4a69bccbe938534b6713/FLAGc5854a5fd [2020-08-18 13:01:33,989 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:01:33,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-18 13:01:34,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce5ee232/538ec470dcde4a69bccbe938534b6713/FLAGc5854a5fd [2020-08-18 13:01:34,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ce5ee232/538ec470dcde4a69bccbe938534b6713 [2020-08-18 13:01:34,267 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:01:34,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:01:34,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:01:34,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:01:34,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:01:34,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:01:34" (1/1) ... [2020-08-18 13:01:34,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee0cdab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:34, skipping insertion in model container [2020-08-18 13:01:34,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:01:34" (1/1) ... [2020-08-18 13:01:34,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:01:34,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:01:34,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:01:34,885 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:01:35,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:01:35,165 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:01:35,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35 WrapperNode [2020-08-18 13:01:35,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:01:35,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:01:35,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:01:35,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:01:35,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... [2020-08-18 13:01:35,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... [2020-08-18 13:01:35,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... [2020-08-18 13:01:35,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... [2020-08-18 13:01:35,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... [2020-08-18 13:01:35,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... [2020-08-18 13:01:35,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... [2020-08-18 13:01:35,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:01:35,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:01:35,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:01:35,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:01:35,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:01:35,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:01:35,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:01:35,401 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 13:01:35,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:01:35,401 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 13:01:35,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:01:35,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 13:01:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 13:01:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:01:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:01:35,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:01:36,743 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:01:36,743 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 13:01:36,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:01:36 BoogieIcfgContainer [2020-08-18 13:01:36,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:01:36,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:01:36,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:01:36,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:01:36,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:01:34" (1/3) ... [2020-08-18 13:01:36,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e7b065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:01:36, skipping insertion in model container [2020-08-18 13:01:36,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:35" (2/3) ... [2020-08-18 13:01:36,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e7b065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:01:36, skipping insertion in model container [2020-08-18 13:01:36,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:01:36" (3/3) ... [2020-08-18 13:01:36,760 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-18 13:01:36,771 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:01:36,779 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 13:01:36,795 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 13:01:36,823 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:01:36,824 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:01:36,824 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:01:36,824 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:01:36,824 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:01:36,825 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:01:36,825 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:01:36,825 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:01:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 13:01:36,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 13:01:36,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:36,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:36,864 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:36,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-18 13:01:36,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:36,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939078017] [2020-08-18 13:01:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:37,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:01:37,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939078017] [2020-08-18 13:01:37,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:01:37,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:01:37,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315746021] [2020-08-18 13:01:37,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:01:37,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:01:37,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:01:37,297 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 13:01:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:39,883 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-18 13:01:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 13:01:39,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-18 13:01:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:39,908 INFO L225 Difference]: With dead ends: 886 [2020-08-18 13:01:39,909 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 13:01:39,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:01:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 13:01:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-18 13:01:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-18 13:01:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-18 13:01:40,017 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-18 13:01:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:40,018 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-18 13:01:40,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:01:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-18 13:01:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 13:01:40,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:40,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:40,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:01:40,026 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:40,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:40,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-18 13:01:40,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:40,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097118029] [2020-08-18 13:01:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:40,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:40,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:01:40,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097118029] [2020-08-18 13:01:40,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:01:40,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 13:01:40,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496846814] [2020-08-18 13:01:40,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:01:40,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:40,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:01:40,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:01:40,343 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-18 13:01:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:42,339 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-18 13:01:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:01:42,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-18 13:01:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:42,347 INFO L225 Difference]: With dead ends: 1320 [2020-08-18 13:01:42,347 INFO L226 Difference]: Without dead ends: 768 [2020-08-18 13:01:42,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-18 13:01:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-18 13:01:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-18 13:01:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-18 13:01:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-18 13:01:42,390 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-18 13:01:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:42,391 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-18 13:01:42,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:01:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-18 13:01:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-18 13:01:42,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:42,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:42,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:01:42,395 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:42,395 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-18 13:01:42,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:42,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651634369] [2020-08-18 13:01:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:42,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:42,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:01:42,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651634369] [2020-08-18 13:01:42,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:01:42,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 13:01:42,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780227429] [2020-08-18 13:01:42,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:01:42,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:42,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:01:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:01:42,729 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-18 13:01:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:44,608 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-18 13:01:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 13:01:44,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-18 13:01:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:44,618 INFO L225 Difference]: With dead ends: 1330 [2020-08-18 13:01:44,618 INFO L226 Difference]: Without dead ends: 770 [2020-08-18 13:01:44,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:01:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-18 13:01:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-18 13:01:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-18 13:01:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-18 13:01:44,665 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-18 13:01:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:44,669 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-18 13:01:44,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:01:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-18 13:01:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-18 13:01:44,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:44,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:44,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:01:44,685 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:44,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-18 13:01:44,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:44,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184303815] [2020-08-18 13:01:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 13:01:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-18 13:01:44,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184303815] [2020-08-18 13:01:44,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:44,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 13:01:44,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377815409] [2020-08-18 13:01:44,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:01:44,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:44,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:01:44,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:01:44,992 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-18 13:01:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:46,862 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-18 13:01:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:01:46,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-18 13:01:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:46,877 INFO L225 Difference]: With dead ends: 2246 [2020-08-18 13:01:46,877 INFO L226 Difference]: Without dead ends: 1498 [2020-08-18 13:01:46,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 13:01:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-18 13:01:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-18 13:01:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-18 13:01:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-18 13:01:46,920 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-18 13:01:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:46,921 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-18 13:01:46,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:01:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-18 13:01:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-18 13:01:46,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:46,928 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:46,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:01:46,928 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:46,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-18 13:01:46,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:46,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525724426] [2020-08-18 13:01:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 13:01:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-18 13:01:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 13:01:47,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525724426] [2020-08-18 13:01:47,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:47,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:01:47,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122705419] [2020-08-18 13:01:47,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:01:47,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:47,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:01:47,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:01:47,729 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-18 13:01:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:50,462 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-18 13:01:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 13:01:50,463 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-18 13:01:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:50,475 INFO L225 Difference]: With dead ends: 3081 [2020-08-18 13:01:50,475 INFO L226 Difference]: Without dead ends: 1734 [2020-08-18 13:01:50,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-18 13:01:50,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-18 13:01:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-18 13:01:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-18 13:01:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-18 13:01:50,536 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-18 13:01:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:50,537 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-18 13:01:50,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:01:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-18 13:01:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-18 13:01:50,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:50,546 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:50,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:01:50,547 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:50,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-18 13:01:50,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:50,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547789677] [2020-08-18 13:01:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:50,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:50,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:50,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 13:01:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:50,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-18 13:01:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-18 13:01:51,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547789677] [2020-08-18 13:01:51,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:51,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 13:01:51,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141274705] [2020-08-18 13:01:51,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:01:51,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:51,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:01:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:01:51,369 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-18 13:01:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:53,595 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-18 13:01:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:01:53,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-18 13:01:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:53,611 INFO L225 Difference]: With dead ends: 3607 [2020-08-18 13:01:53,611 INFO L226 Difference]: Without dead ends: 1923 [2020-08-18 13:01:53,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-18 13:01:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-18 13:01:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-18 13:01:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 13:01:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-18 13:01:53,688 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-18 13:01:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:53,689 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-18 13:01:53,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:01:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-18 13:01:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-18 13:01:53,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:53,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:53,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 13:01:53,699 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:53,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-18 13:01:53,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:53,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851173246] [2020-08-18 13:01:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-18 13:01:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:54,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-18 13:01:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-18 13:01:54,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851173246] [2020-08-18 13:01:54,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:54,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:01:54,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123913554] [2020-08-18 13:01:54,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:01:54,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:54,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:01:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:01:54,310 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-18 13:01:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:57,715 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-18 13:01:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 13:01:57,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-18 13:01:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:57,736 INFO L225 Difference]: With dead ends: 5807 [2020-08-18 13:01:57,737 INFO L226 Difference]: Without dead ends: 3550 [2020-08-18 13:01:57,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-18 13:01:57,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-18 13:01:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-18 13:01:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 13:01:57,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-18 13:01:57,861 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-18 13:01:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:57,861 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-18 13:01:57,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:01:57,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-18 13:01:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-18 13:01:57,871 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:57,872 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:01:57,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 13:01:57,872 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-18 13:01:57,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:57,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803200897] [2020-08-18 13:01:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:01:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:01:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 13:01:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-18 13:01:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-18 13:01:58,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803200897] [2020-08-18 13:01:58,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:58,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 13:01:58,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729589513] [2020-08-18 13:01:58,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:01:58,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:58,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:01:58,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:01:58,617 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-18 13:02:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:00,232 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-18 13:02:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:02:00,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-18 13:02:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:00,257 INFO L225 Difference]: With dead ends: 6928 [2020-08-18 13:02:00,257 INFO L226 Difference]: Without dead ends: 3938 [2020-08-18 13:02:00,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:02:00,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-18 13:02:00,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-18 13:02:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-18 13:02:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-18 13:02:00,395 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-18 13:02:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:00,400 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-18 13:02:00,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:02:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-18 13:02:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-18 13:02:00,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:00,419 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:02:00,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 13:02:00,420 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-18 13:02:00,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:00,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702029285] [2020-08-18 13:02:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:00,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:00,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:00,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:00,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:00,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:00,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-18 13:02:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-18 13:02:01,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702029285] [2020-08-18 13:02:01,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:01,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 13:02:01,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312621362] [2020-08-18 13:02:01,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:02:01,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:01,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:02:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:02:01,212 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-18 13:02:02,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:02,865 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-18 13:02:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:02:02,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-18 13:02:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:02,888 INFO L225 Difference]: With dead ends: 8034 [2020-08-18 13:02:02,888 INFO L226 Difference]: Without dead ends: 4484 [2020-08-18 13:02:02,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:02:02,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-18 13:02:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-18 13:02:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-18 13:02:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-18 13:02:03,012 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-18 13:02:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:03,013 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-18 13:02:03,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:02:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-18 13:02:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-18 13:02:03,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:03,030 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:02:03,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 13:02:03,031 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:03,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-18 13:02:03,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:03,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306252942] [2020-08-18 13:02:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-18 13:02:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-18 13:02:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-18 13:02:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:03,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-18 13:02:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-18 13:02:04,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306252942] [2020-08-18 13:02:04,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:04,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 13:02:04,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327138073] [2020-08-18 13:02:04,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:02:04,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:04,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:02:04,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:02:04,820 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-18 13:02:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:06,679 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-18 13:02:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:02:06,680 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-18 13:02:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:06,698 INFO L225 Difference]: With dead ends: 8817 [2020-08-18 13:02:06,698 INFO L226 Difference]: Without dead ends: 4494 [2020-08-18 13:02:06,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 13:02:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-18 13:02:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-18 13:02:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-18 13:02:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-18 13:02:06,803 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-18 13:02:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:06,803 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-18 13:02:06,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:02:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-18 13:02:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-18 13:02:06,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:06,822 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:02:06,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 13:02:06,823 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:06,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-18 13:02:06,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:06,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997202997] [2020-08-18 13:02:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 13:02:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-18 13:02:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-18 13:02:07,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997202997] [2020-08-18 13:02:07,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:07,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 13:02:07,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504235606] [2020-08-18 13:02:07,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:02:07,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:02:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:02:07,981 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-18 13:02:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:09,571 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-18 13:02:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:02:09,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-18 13:02:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:09,594 INFO L225 Difference]: With dead ends: 9674 [2020-08-18 13:02:09,594 INFO L226 Difference]: Without dead ends: 5398 [2020-08-18 13:02:09,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-18 13:02:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-18 13:02:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-18 13:02:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-18 13:02:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-18 13:02:09,704 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-18 13:02:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:09,706 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-18 13:02:09,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:02:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-18 13:02:09,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-18 13:02:09,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:09,724 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:02:09,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 13:02:09,724 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-18 13:02:09,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:09,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378510574] [2020-08-18 13:02:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:09,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:09,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:09,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 13:02:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-18 13:02:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-18 13:02:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-18 13:02:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-18 13:02:11,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378510574] [2020-08-18 13:02:11,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:11,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:02:11,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830667292] [2020-08-18 13:02:11,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:02:11,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:02:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:02:11,088 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-18 13:02:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:13,822 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-18 13:02:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 13:02:13,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-18 13:02:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:13,859 INFO L225 Difference]: With dead ends: 11142 [2020-08-18 13:02:13,859 INFO L226 Difference]: Without dead ends: 6124 [2020-08-18 13:02:13,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-18 13:02:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-18 13:02:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-18 13:02:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-18 13:02:13,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-18 13:02:13,989 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-18 13:02:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:13,990 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-18 13:02:13,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:02:13,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-18 13:02:14,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-18 13:02:14,012 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:14,013 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:02:14,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 13:02:14,013 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-18 13:02:14,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:14,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643346080] [2020-08-18 13:02:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 13:02:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-18 13:02:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:14,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-18 13:02:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-18 13:02:15,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643346080] [2020-08-18 13:02:15,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:15,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:02:15,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574076343] [2020-08-18 13:02:15,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:02:15,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:02:15,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:02:15,531 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-18 13:02:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:19,049 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-18 13:02:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 13:02:19,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-18 13:02:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:19,069 INFO L225 Difference]: With dead ends: 11324 [2020-08-18 13:02:19,070 INFO L226 Difference]: Without dead ends: 5758 [2020-08-18 13:02:19,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-18 13:02:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-18 13:02:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-18 13:02:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-18 13:02:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-18 13:02:19,179 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-18 13:02:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:19,179 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-18 13:02:19,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:02:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-18 13:02:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-18 13:02:19,198 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:19,198 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:02:19,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 13:02:19,199 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-18 13:02:19,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:19,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434244045] [2020-08-18 13:02:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 13:02:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-18 13:02:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:19,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-18 13:02:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-18 13:02:20,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434244045] [2020-08-18 13:02:20,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:20,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:02:20,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583576659] [2020-08-18 13:02:20,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:02:20,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:20,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:02:20,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:02:20,348 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-18 13:02:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:23,596 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-18 13:02:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 13:02:23,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-18 13:02:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:23,627 INFO L225 Difference]: With dead ends: 13170 [2020-08-18 13:02:23,628 INFO L226 Difference]: Without dead ends: 7602 [2020-08-18 13:02:23,640 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 [2020-08-18 13:02:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-18 13:02:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-18 13:02:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-18 13:02:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-18 13:02:23,827 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-18 13:02:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:23,828 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-18 13:02:23,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:02:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-18 13:02:23,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-18 13:02:23,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:23,871 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 13:02:23,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 13:02:23,872 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-18 13:02:23,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:23,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937002535] [2020-08-18 13:02:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 13:02:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 13:02:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-18 13:02:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-18 13:02:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:24,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-18 13:02:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-18 13:02:25,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937002535] [2020-08-18 13:02:25,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:25,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:02:25,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144574798] [2020-08-18 13:02:25,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:02:25,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:25,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:02:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:02:25,363 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-18 13:02:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:28,236 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-18 13:02:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 13:02:28,237 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-18 13:02:28,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:28,263 INFO L225 Difference]: With dead ends: 17064 [2020-08-18 13:02:28,264 INFO L226 Difference]: Without dead ends: 9836 [2020-08-18 13:02:28,286 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 [2020-08-18 13:02:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-18 13:02:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-18 13:02:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-18 13:02:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-18 13:02:28,464 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-18 13:02:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:28,465 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-18 13:02:28,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:02:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions. [2020-08-18 13:02:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1149 [2020-08-18 13:02:28,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:28,503 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] [2020-08-18 13:02:28,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 13:02:28,504 INFO L427 AbstractCegarLoop]: === Iteration 16 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash 166705873, now seen corresponding path program 1 times [2020-08-18 13:02:28,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:28,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614360656] [2020-08-18 13:02:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat