/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:22:54,189 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 01:22:54,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:22:54,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:22:54,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:22:54,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:22:54,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:22:54,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:22:54,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:22:54,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:22:54,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:22:54,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:22:54,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:22:54,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:22:54,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:22:54,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:22:54,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:22:54,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:22:54,321 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 [2020-08-22 01:22:54,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:22:54,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:22:54,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:22:54,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:22:54,347 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:22:54,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:22:54,348 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:22:54,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:22:54,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:22:54,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:22:54,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:22:54,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:22:54,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:22:54,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:22:54,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:22:54,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:22:54,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:22:54,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:22:54,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:22:54,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:22:54,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:22:54,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:22:54,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:22:54,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:22:54,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:22:54,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:22:54,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:22:54,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:22:54,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:22:54,352 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:22:54,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:22:54,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:22:54,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:22:54,688 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:22:54,689 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:22:54,690 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-22 01:22:54,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2b8f4e2e/4f33df992bba4f3c81eef0dd3315b112/FLAG3babf027a [2020-08-22 01:22:55,205 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:22:55,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-08-22 01:22:55,213 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2b8f4e2e/4f33df992bba4f3c81eef0dd3315b112/FLAG3babf027a [2020-08-22 01:22:55,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2b8f4e2e/4f33df992bba4f3c81eef0dd3315b112 [2020-08-22 01:22:55,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:22:55,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:22:55,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:55,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:22:55,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:22:55,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:55,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634162df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55, skipping insertion in model container [2020-08-22 01:22:55,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:55,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:22:55,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:22:55,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:55,862 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:22:55,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:55,897 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:22:55,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55 WrapperNode [2020-08-22 01:22:55,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:55,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:22:55,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:22:55,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:22:55,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:55,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:56,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:56,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:56,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:56,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:56,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (1/1) ... [2020-08-22 01:22:56,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:22:56,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:22:56,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:22:56,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:22:56,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (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 [2020-08-22 01:22:56,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:22:56,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:22:56,102 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-08-22 01:22:56,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:22:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:22:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:22:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-08-22 01:22:56,104 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:22:56,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:22:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:22:56,324 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:22:56,325 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 01:22:56,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:56 BoogieIcfgContainer [2020-08-22 01:22:56,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:22:56,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:22:56,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:22:56,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:22:56,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:22:55" (1/3) ... [2020-08-22 01:22:56,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ba723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:56, skipping insertion in model container [2020-08-22 01:22:56,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:55" (2/3) ... [2020-08-22 01:22:56,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ba723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:56, skipping insertion in model container [2020-08-22 01:22:56,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:56" (3/3) ... [2020-08-22 01:22:56,339 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-08-22 01:22:56,365 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:22:56,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:22:56,407 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:22:56,445 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:22:56,445 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:22:56,446 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:22:56,446 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:22:56,446 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:22:56,447 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:22:56,447 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:22:56,447 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:22:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 01:22:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:22:56,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:56,477 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:56,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-08-22 01:22:56,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:56,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093394073] [2020-08-22 01:22:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:22:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-08-22 01:22:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 01:22:56,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093394073] [2020-08-22 01:22:56,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:56,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:22:56,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430611178] [2020-08-22 01:22:56,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:56,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:56,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:56,794 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-08-22 01:22:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:56,993 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-08-22 01:22:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:22:56,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-22 01:22:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:57,009 INFO L225 Difference]: With dead ends: 41 [2020-08-22 01:22:57,009 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 01:22:57,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 01:22:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 01:22:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 01:22:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-08-22 01:22:57,059 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-08-22 01:22:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:57,060 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-08-22 01:22:57,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-08-22 01:22:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 01:22:57,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:57,064 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:57,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:22:57,064 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-08-22 01:22:57,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:57,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3433091] [2020-08-22 01:22:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:22:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:22:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 01:22:57,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3433091] [2020-08-22 01:22:57,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:57,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:22:57,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539558045] [2020-08-22 01:22:57,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:57,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:57,200 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-08-22 01:22:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:57,338 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-08-22 01:22:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:22:57,339 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 01:22:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:57,340 INFO L225 Difference]: With dead ends: 29 [2020-08-22 01:22:57,341 INFO L226 Difference]: Without dead ends: 25 [2020-08-22 01:22:57,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:57,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-22 01:22:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-08-22 01:22:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 01:22:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-08-22 01:22:57,350 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-08-22 01:22:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:57,350 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-08-22 01:22:57,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-08-22 01:22:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 01:22:57,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:57,353 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:57,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:22:57,353 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:57,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:57,354 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-08-22 01:22:57,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:57,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955132836] [2020-08-22 01:22:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:22:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:22:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 01:22:57,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955132836] [2020-08-22 01:22:57,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:57,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:22:57,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525693072] [2020-08-22 01:22:57,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:22:57,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:22:57,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:57,890 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 15 states. [2020-08-22 01:22:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:58,455 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2020-08-22 01:22:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:22:58,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-08-22 01:22:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:58,459 INFO L225 Difference]: With dead ends: 43 [2020-08-22 01:22:58,459 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 01:22:58,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:22:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 01:22:58,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-08-22 01:22:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 01:22:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-08-22 01:22:58,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-08-22 01:22:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:58,477 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-08-22 01:22:58,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:22:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-08-22 01:22:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 01:22:58,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:58,480 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:58,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:22:58,480 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-08-22 01:22:58,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:58,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122361604] [2020-08-22 01:22:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:22:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:22:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 01:22:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 01:22:58,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122361604] [2020-08-22 01:22:58,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:58,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:22:58,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114795754] [2020-08-22 01:22:58,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:22:58,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:58,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:22:58,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:58,595 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2020-08-22 01:22:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:58,669 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2020-08-22 01:22:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:22:58,670 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-08-22 01:22:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:58,671 INFO L225 Difference]: With dead ends: 54 [2020-08-22 01:22:58,672 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 01:22:58,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 01:22:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 01:22:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 01:22:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-08-22 01:22:58,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 43 [2020-08-22 01:22:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:58,682 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-08-22 01:22:58,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:22:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-08-22 01:22:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 01:22:58,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:58,684 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:58,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:22:58,685 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-08-22 01:22:58,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:58,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685418348] [2020-08-22 01:22:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:22:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:22:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 01:22:59,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685418348] [2020-08-22 01:22:59,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:59,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:22:59,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646272265] [2020-08-22 01:22:59,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:22:59,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:59,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:22:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:59,227 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 19 states. [2020-08-22 01:22:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:59,716 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-08-22 01:22:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:22:59,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-08-22 01:22:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:59,719 INFO L225 Difference]: With dead ends: 39 [2020-08-22 01:22:59,719 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 01:22:59,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:22:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 01:22:59,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-08-22 01:22:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 01:22:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-08-22 01:22:59,728 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 44 [2020-08-22 01:22:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:59,729 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-08-22 01:22:59,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:22:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-08-22 01:22:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 01:22:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:59,731 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:59,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:22:59,731 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash 430867302, now seen corresponding path program 4 times [2020-08-22 01:22:59,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:59,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380734083] [2020-08-22 01:22:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:22:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:22:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:23:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-08-22 01:23:00,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380734083] [2020-08-22 01:23:00,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:00,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:23:00,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709601285] [2020-08-22 01:23:00,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:23:00,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:23:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:00,335 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 21 states. [2020-08-22 01:23:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:01,044 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-08-22 01:23:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:23:01,044 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-08-22 01:23:01,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:01,047 INFO L225 Difference]: With dead ends: 42 [2020-08-22 01:23:01,047 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 01:23:01,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:23:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 01:23:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-22 01:23:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 01:23:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-08-22 01:23:01,058 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 51 [2020-08-22 01:23:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:01,058 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-08-22 01:23:01,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:23:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-08-22 01:23:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:23:01,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:01,060 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:01,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:23:01,061 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:01,061 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 5 times [2020-08-22 01:23:01,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:01,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848509456] [2020-08-22 01:23:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:23:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-08-22 01:23:01,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848509456] [2020-08-22 01:23:01,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:01,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:23:01,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076642879] [2020-08-22 01:23:01,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:23:01,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:23:01,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:01,703 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 23 states. [2020-08-22 01:23:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:02,572 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-22 01:23:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:23:02,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-08-22 01:23:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:02,575 INFO L225 Difference]: With dead ends: 45 [2020-08-22 01:23:02,575 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 01:23:02,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:23:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 01:23:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-08-22 01:23:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 01:23:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-22 01:23:02,588 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 58 [2020-08-22 01:23:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:02,588 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-22 01:23:02,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:23:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-22 01:23:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 01:23:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:02,590 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:02,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:23:02,590 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 6 times [2020-08-22 01:23:02,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:02,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265512622] [2020-08-22 01:23:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:23:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-08-22 01:23:02,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265512622] [2020-08-22 01:23:02,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:02,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:23:02,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760321746] [2020-08-22 01:23:02,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:23:02,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:02,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:23:02,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:23:02,926 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 17 states. [2020-08-22 01:23:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:03,456 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-08-22 01:23:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:23:03,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-08-22 01:23:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:03,459 INFO L225 Difference]: With dead ends: 47 [2020-08-22 01:23:03,459 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 01:23:03,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 01:23:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-22 01:23:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:23:03,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2020-08-22 01:23:03,470 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 44 [2020-08-22 01:23:03,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:03,470 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2020-08-22 01:23:03,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:23:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2020-08-22 01:23:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 01:23:03,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:03,472 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:03,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:23:03,473 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1872336740, now seen corresponding path program 7 times [2020-08-22 01:23:03,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:03,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090808385] [2020-08-22 01:23:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:23:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-22 01:23:03,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090808385] [2020-08-22 01:23:03,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:03,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:23:03,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190193427] [2020-08-22 01:23:03,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:23:03,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:23:03,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:23:03,869 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand 15 states. [2020-08-22 01:23:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:04,241 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2020-08-22 01:23:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:23:04,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2020-08-22 01:23:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:04,244 INFO L225 Difference]: With dead ends: 47 [2020-08-22 01:23:04,244 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 01:23:04,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:04,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 01:23:04,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-22 01:23:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:23:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-08-22 01:23:04,266 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 51 [2020-08-22 01:23:04,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:04,266 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-08-22 01:23:04,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:23:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-08-22 01:23:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:23:04,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:04,270 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:04,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:23:04,271 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1605933725, now seen corresponding path program 8 times [2020-08-22 01:23:04,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:04,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280931322] [2020-08-22 01:23:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:23:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-22 01:23:04,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280931322] [2020-08-22 01:23:04,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:04,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:23:04,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014221843] [2020-08-22 01:23:04,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:23:04,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:23:04,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:04,889 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 22 states. [2020-08-22 01:23:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:05,657 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-08-22 01:23:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:23:05,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-22 01:23:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:05,661 INFO L225 Difference]: With dead ends: 47 [2020-08-22 01:23:05,661 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 01:23:05,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:23:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 01:23:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-22 01:23:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 01:23:05,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-08-22 01:23:05,671 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 58 [2020-08-22 01:23:05,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:05,671 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-08-22 01:23:05,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:23:05,672 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-08-22 01:23:05,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 01:23:05,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:05,673 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:05,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:23:05,673 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash 921134702, now seen corresponding path program 9 times [2020-08-22 01:23:05,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:05,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541562397] [2020-08-22 01:23:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:23:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-22 01:23:06,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541562397] [2020-08-22 01:23:06,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:06,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:23:06,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823721068] [2020-08-22 01:23:06,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:23:06,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:23:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:06,315 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 24 states. [2020-08-22 01:23:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:07,260 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-08-22 01:23:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:23:07,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-22 01:23:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:07,263 INFO L225 Difference]: With dead ends: 47 [2020-08-22 01:23:07,263 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 01:23:07,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:23:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 01:23:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-08-22 01:23:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 01:23:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-08-22 01:23:07,272 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 65 [2020-08-22 01:23:07,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:07,272 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-08-22 01:23:07,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:23:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-08-22 01:23:07,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 01:23:07,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:07,273 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:07,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:23:07,274 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:07,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:07,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 10 times [2020-08-22 01:23:07,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:07,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101839361] [2020-08-22 01:23:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:23:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 11 proven. 95 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-08-22 01:23:07,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101839361] [2020-08-22 01:23:07,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:07,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:23:07,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910653911] [2020-08-22 01:23:07,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:23:07,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:07,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:23:07,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:07,945 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 25 states. [2020-08-22 01:23:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:09,000 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-22 01:23:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:09,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-08-22 01:23:09,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:09,002 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:23:09,003 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:23:09,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 01:23:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:23:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-22 01:23:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:23:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-22 01:23:09,012 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 65 [2020-08-22 01:23:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:09,012 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-22 01:23:09,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:23:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-22 01:23:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:23:09,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:09,014 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:09,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:23:09,014 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 11 times [2020-08-22 01:23:09,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:09,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274179947] [2020-08-22 01:23:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:23:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 01:23:09,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274179947] [2020-08-22 01:23:09,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:09,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:23:09,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323544999] [2020-08-22 01:23:09,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:23:09,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:09,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:23:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:09,777 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 26 states. [2020-08-22 01:23:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:10,911 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-22 01:23:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:10,912 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-22 01:23:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:10,913 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:23:10,914 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:23:10,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 01:23:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:23:10,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-22 01:23:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 01:23:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-22 01:23:10,928 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 72 [2020-08-22 01:23:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:10,929 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-22 01:23:10,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:23:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-22 01:23:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:23:10,932 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:10,933 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:10,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:23:10,933 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:10,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1677321585, now seen corresponding path program 12 times [2020-08-22 01:23:10,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:10,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947292524] [2020-08-22 01:23:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:23:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 01:23:11,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947292524] [2020-08-22 01:23:11,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:11,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:23:11,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526062710] [2020-08-22 01:23:11,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:23:11,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:11,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:23:11,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:11,639 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 26 states. [2020-08-22 01:23:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:12,658 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-08-22 01:23:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:23:12,659 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-22 01:23:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:12,660 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:23:12,660 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:23:12,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:23:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:23:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-22 01:23:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:23:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-22 01:23:12,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 72 [2020-08-22 01:23:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:12,684 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-22 01:23:12,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:23:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-22 01:23:12,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:23:12,688 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:12,688 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:12,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:23:12,688 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:12,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:12,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1255254341, now seen corresponding path program 13 times [2020-08-22 01:23:12,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:12,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834987912] [2020-08-22 01:23:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:23:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-08-22 01:23:13,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834987912] [2020-08-22 01:23:13,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:13,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:23:13,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88747298] [2020-08-22 01:23:13,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:23:13,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:13,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:23:13,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:13,361 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 22 states. [2020-08-22 01:23:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:14,120 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-08-22 01:23:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:23:14,121 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-22 01:23:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:14,122 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:23:14,122 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:23:14,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:23:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:23:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-22 01:23:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:23:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2020-08-22 01:23:14,130 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 58 [2020-08-22 01:23:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:14,131 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2020-08-22 01:23:14,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:23:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2020-08-22 01:23:14,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 01:23:14,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:14,132 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:14,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:23:14,132 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 14 times [2020-08-22 01:23:14,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:14,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405328282] [2020-08-22 01:23:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:23:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 82 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-22 01:23:14,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405328282] [2020-08-22 01:23:14,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:14,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:23:14,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667684174] [2020-08-22 01:23:14,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:23:14,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:14,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:23:14,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:23:14,550 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 17 states. [2020-08-22 01:23:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:15,091 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-08-22 01:23:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:23:15,091 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-08-22 01:23:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:15,093 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:23:15,093 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:23:15,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:23:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-22 01:23:15,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:23:15,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-08-22 01:23:15,100 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 65 [2020-08-22 01:23:15,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:15,100 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-08-22 01:23:15,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:23:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-08-22 01:23:15,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:23:15,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:15,102 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:15,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:23:15,102 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2039564078, now seen corresponding path program 15 times [2020-08-22 01:23:15,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:15,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734386337] [2020-08-22 01:23:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:23:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-22 01:23:16,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734386337] [2020-08-22 01:23:16,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:16,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:23:16,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016231570] [2020-08-22 01:23:16,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:23:16,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:23:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:23:16,065 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 28 states. [2020-08-22 01:23:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:17,300 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2020-08-22 01:23:17,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:17,300 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 01:23:17,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:17,302 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:23:17,302 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:23:17,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:23:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:23:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-08-22 01:23:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:23:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2020-08-22 01:23:17,310 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 79 [2020-08-22 01:23:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:17,311 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2020-08-22 01:23:17,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:23:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2020-08-22 01:23:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 01:23:17,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:17,312 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:17,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:23:17,312 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -746065050, now seen corresponding path program 16 times [2020-08-22 01:23:17,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:17,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273582737] [2020-08-22 01:23:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:23:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-08-22 01:23:17,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273582737] [2020-08-22 01:23:17,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:17,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:23:17,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928046322] [2020-08-22 01:23:17,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:23:17,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:23:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:23:17,764 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand 19 states. [2020-08-22 01:23:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:18,468 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-08-22 01:23:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:23:18,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-08-22 01:23:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:18,470 INFO L225 Difference]: With dead ends: 50 [2020-08-22 01:23:18,470 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 01:23:18,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:23:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 01:23:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-22 01:23:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 01:23:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2020-08-22 01:23:18,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 51 [2020-08-22 01:23:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:18,477 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2020-08-22 01:23:18,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:23:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2020-08-22 01:23:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:23:18,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:18,479 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:18,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:23:18,479 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 17 times [2020-08-22 01:23:18,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:18,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291226163] [2020-08-22 01:23:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:23:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-08-22 01:23:19,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291226163] [2020-08-22 01:23:19,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:19,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:23:19,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464141842] [2020-08-22 01:23:19,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:23:19,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:23:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:19,303 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand 27 states. [2020-08-22 01:23:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:20,510 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-22 01:23:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:20,511 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-08-22 01:23:20,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:20,512 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:20,512 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:20,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 01:23:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 01:23:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:23:20,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-22 01:23:20,520 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 72 [2020-08-22 01:23:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:20,520 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-22 01:23:20,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:23:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-22 01:23:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:23:20,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:20,522 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:20,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:23:20,522 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:20,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1806425208, now seen corresponding path program 18 times [2020-08-22 01:23:20,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:20,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608715149] [2020-08-22 01:23:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:23:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-22 01:23:21,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608715149] [2020-08-22 01:23:21,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:21,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:23:21,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123570759] [2020-08-22 01:23:21,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:23:21,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:21,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:23:21,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:23:21,394 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 28 states. [2020-08-22 01:23:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:22,687 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-08-22 01:23:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:22,688 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 01:23:22,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:22,689 INFO L225 Difference]: With dead ends: 55 [2020-08-22 01:23:22,689 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 01:23:22,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:23:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 01:23:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-08-22 01:23:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:23:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-22 01:23:22,697 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 79 [2020-08-22 01:23:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:22,697 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-22 01:23:22,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:23:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-22 01:23:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:23:22,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:22,698 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:22,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:23:22,699 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1615348441, now seen corresponding path program 19 times [2020-08-22 01:23:22,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:22,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159387304] [2020-08-22 01:23:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:22,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:23:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-22 01:23:23,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159387304] [2020-08-22 01:23:23,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:23,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 01:23:23,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078559550] [2020-08-22 01:23:23,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 01:23:23,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:23,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 01:23:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:23:23,814 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 30 states. [2020-08-22 01:23:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:25,450 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-22 01:23:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:25,450 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-22 01:23:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:25,452 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:25,452 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:25,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=1811, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 01:23:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-22 01:23:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 01:23:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-22 01:23:25,460 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 86 [2020-08-22 01:23:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:25,460 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-22 01:23:25,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 01:23:25,461 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-22 01:23:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:23:25,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:25,462 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:25,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:23:25,462 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:25,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:25,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1524702692, now seen corresponding path program 20 times [2020-08-22 01:23:25,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:25,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473424729] [2020-08-22 01:23:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:23:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-08-22 01:23:25,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473424729] [2020-08-22 01:23:25,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:25,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:23:25,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477937017] [2020-08-22 01:23:25,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:23:25,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:23:25,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:23:25,968 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 19 states. [2020-08-22 01:23:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:26,771 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2020-08-22 01:23:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:23:26,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-08-22 01:23:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:26,775 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:26,775 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:26,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:23:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:26,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 01:23:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:23:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2020-08-22 01:23:26,781 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 79 [2020-08-22 01:23:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:26,781 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 66 transitions. [2020-08-22 01:23:26,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:23:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 66 transitions. [2020-08-22 01:23:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:23:26,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:26,782 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:26,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:23:26,782 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:26,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1830896665, now seen corresponding path program 21 times [2020-08-22 01:23:26,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:26,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662565264] [2020-08-22 01:23:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:23:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 01:23:27,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662565264] [2020-08-22 01:23:27,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:27,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:23:27,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178426676] [2020-08-22 01:23:27,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:23:27,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:27,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:23:27,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:27,633 INFO L87 Difference]: Start difference. First operand 45 states and 66 transitions. Second operand 26 states. [2020-08-22 01:23:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:28,789 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-08-22 01:23:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:23:28,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-08-22 01:23:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:28,791 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:28,791 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:28,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 01:23:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 01:23:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:23:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2020-08-22 01:23:28,798 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 72 [2020-08-22 01:23:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:28,798 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2020-08-22 01:23:28,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:23:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2020-08-22 01:23:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 01:23:28,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:28,799 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:28,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:23:28,800 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:28,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2003180303, now seen corresponding path program 22 times [2020-08-22 01:23:28,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:28,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237381202] [2020-08-22 01:23:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:28,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:23:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-22 01:23:29,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237381202] [2020-08-22 01:23:29,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:29,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:23:29,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148069987] [2020-08-22 01:23:29,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:23:29,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:29,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:23:29,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:29,345 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand 21 states. [2020-08-22 01:23:30,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:30,207 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2020-08-22 01:23:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:23:30,207 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2020-08-22 01:23:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:30,209 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:30,209 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:30,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:23:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 01:23:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:23:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-08-22 01:23:30,215 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 58 [2020-08-22 01:23:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:30,215 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-08-22 01:23:30,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:23:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-08-22 01:23:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 01:23:30,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:30,216 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:30,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:23:30,217 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:30,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 23 times [2020-08-22 01:23:30,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:30,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723492714] [2020-08-22 01:23:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:23:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-08-22 01:23:30,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723492714] [2020-08-22 01:23:30,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:30,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:23:30,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572264199] [2020-08-22 01:23:30,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:23:30,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:30,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:23:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:30,890 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 24 states. [2020-08-22 01:23:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:31,888 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2020-08-22 01:23:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:23:31,889 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-08-22 01:23:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:31,891 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:31,891 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:31,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 01:23:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 01:23:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:23:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2020-08-22 01:23:31,897 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 65 [2020-08-22 01:23:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:31,898 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2020-08-22 01:23:31,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:23:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2020-08-22 01:23:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:23:31,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:31,899 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:31,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:23:31,899 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:31,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1937884195, now seen corresponding path program 24 times [2020-08-22 01:23:31,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:31,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847159191] [2020-08-22 01:23:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:31,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:31,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:23:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-22 01:23:32,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847159191] [2020-08-22 01:23:32,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:32,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 01:23:32,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720083039] [2020-08-22 01:23:32,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 01:23:32,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 01:23:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:23:32,963 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand 30 states. [2020-08-22 01:23:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:34,373 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2020-08-22 01:23:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:34,374 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-22 01:23:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:34,375 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:34,376 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:34,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 01:23:34,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-08-22 01:23:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 01:23:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-08-22 01:23:34,382 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 86 [2020-08-22 01:23:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:34,382 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-08-22 01:23:34,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 01:23:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-08-22 01:23:34,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 01:23:34,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:34,384 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:34,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:23:34,385 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash -335786642, now seen corresponding path program 25 times [2020-08-22 01:23:34,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:34,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401315792] [2020-08-22 01:23:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:34,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:23:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-22 01:23:35,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401315792] [2020-08-22 01:23:35,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:35,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 01:23:35,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520110321] [2020-08-22 01:23:35,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 01:23:35,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:35,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 01:23:35,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:23:35,859 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 32 states. [2020-08-22 01:23:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:37,621 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-22 01:23:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:37,622 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-22 01:23:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:37,624 INFO L225 Difference]: With dead ends: 53 [2020-08-22 01:23:37,624 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 01:23:37,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 01:23:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 01:23:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-08-22 01:23:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 01:23:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-08-22 01:23:37,631 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 93 [2020-08-22 01:23:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:37,631 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-08-22 01:23:37,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 01:23:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-08-22 01:23:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:23:37,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:37,633 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:37,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:23:37,633 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 26 times [2020-08-22 01:23:37,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:37,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125246816] [2020-08-22 01:23:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:37,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:37,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:37,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:37,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:23:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:37,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:37,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:38,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:38,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:38,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:38,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:38,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-08-22 01:23:38,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125246816] [2020-08-22 01:23:38,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:38,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 01:23:38,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841338876] [2020-08-22 01:23:38,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 01:23:38,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:38,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 01:23:38,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:23:38,603 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 29 states. [2020-08-22 01:23:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:40,249 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2020-08-22 01:23:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:40,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-08-22 01:23:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:40,251 INFO L225 Difference]: With dead ends: 56 [2020-08-22 01:23:40,251 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 01:23:40,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 01:23:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 01:23:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-22 01:23:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:23:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-22 01:23:40,257 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 79 [2020-08-22 01:23:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:40,258 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-22 01:23:40,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 01:23:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-22 01:23:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:23:40,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:40,259 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:40,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:23:40,259 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 27 times [2020-08-22 01:23:40,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:40,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837789718] [2020-08-22 01:23:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:23:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:40,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-08-22 01:23:41,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837789718] [2020-08-22 01:23:41,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:41,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 01:23:41,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839618216] [2020-08-22 01:23:41,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 01:23:41,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 01:23:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=806, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:23:41,360 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 30 states. [2020-08-22 01:23:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:43,204 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-22 01:23:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:43,206 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2020-08-22 01:23:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:43,207 INFO L225 Difference]: With dead ends: 58 [2020-08-22 01:23:43,207 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:23:43,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=181, Invalid=1981, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 01:23:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:23:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-22 01:23:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:23:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-22 01:23:43,213 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 86 [2020-08-22 01:23:43,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:43,214 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-22 01:23:43,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 01:23:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-22 01:23:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 01:23:43,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:43,215 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:43,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 01:23:43,215 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:43,215 INFO L82 PathProgramCache]: Analyzing trace with hash -313052920, now seen corresponding path program 28 times [2020-08-22 01:23:43,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:43,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780701664] [2020-08-22 01:23:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:23:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:43,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:44,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:44,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:44,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:44,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-08-22 01:23:44,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780701664] [2020-08-22 01:23:44,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:44,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 01:23:44,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141118169] [2020-08-22 01:23:44,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 01:23:44,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 01:23:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:23:44,467 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 32 states. [2020-08-22 01:23:46,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:46,350 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-08-22 01:23:46,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:46,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2020-08-22 01:23:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:46,352 INFO L225 Difference]: With dead ends: 58 [2020-08-22 01:23:46,352 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 01:23:46,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=2165, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 01:23:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 01:23:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-08-22 01:23:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:23:46,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 67 transitions. [2020-08-22 01:23:46,359 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 67 transitions. Word has length 93 [2020-08-22 01:23:46,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:46,359 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 67 transitions. [2020-08-22 01:23:46,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 01:23:46,360 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 67 transitions. [2020-08-22 01:23:46,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 01:23:46,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:46,361 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:46,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 01:23:46,361 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:46,361 INFO L82 PathProgramCache]: Analyzing trace with hash -789379885, now seen corresponding path program 29 times [2020-08-22 01:23:46,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:46,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048122340] [2020-08-22 01:23:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:23:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:46,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-08-22 01:23:47,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048122340] [2020-08-22 01:23:47,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:47,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 01:23:47,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917552540] [2020-08-22 01:23:47,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 01:23:47,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:47,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 01:23:47,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:23:47,796 INFO L87 Difference]: Start difference. First operand 48 states and 67 transitions. Second operand 34 states. [2020-08-22 01:23:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:49,941 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2020-08-22 01:23:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:49,942 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 100 [2020-08-22 01:23:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:49,943 INFO L225 Difference]: With dead ends: 56 [2020-08-22 01:23:49,943 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 01:23:49,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=193, Invalid=2357, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 01:23:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 01:23:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-22 01:23:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 01:23:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-08-22 01:23:49,948 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 100 [2020-08-22 01:23:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:49,949 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-08-22 01:23:49,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 01:23:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-08-22 01:23:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 01:23:49,950 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:49,950 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:49,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 01:23:49,950 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:49,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1159270008, now seen corresponding path program 30 times [2020-08-22 01:23:49,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:49,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426522063] [2020-08-22 01:23:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:23:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 198 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-08-22 01:23:50,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426522063] [2020-08-22 01:23:50,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:50,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:23:50,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485086234] [2020-08-22 01:23:50,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:23:50,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:23:50,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:50,630 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 21 states. [2020-08-22 01:23:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:51,720 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-08-22 01:23:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:51,721 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-08-22 01:23:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:51,722 INFO L225 Difference]: With dead ends: 56 [2020-08-22 01:23:51,723 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 01:23:51,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:23:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 01:23:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-22 01:23:51,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:23:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 72 transitions. [2020-08-22 01:23:51,729 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 72 transitions. Word has length 93 [2020-08-22 01:23:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:51,729 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 72 transitions. [2020-08-22 01:23:51,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:23:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 72 transitions. [2020-08-22 01:23:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:23:51,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:51,731 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:51,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 01:23:51,731 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash -505812782, now seen corresponding path program 31 times [2020-08-22 01:23:51,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:51,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338026751] [2020-08-22 01:23:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:51,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:51,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:51,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:51,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:23:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-08-22 01:23:52,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338026751] [2020-08-22 01:23:52,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:52,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:23:52,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608943970] [2020-08-22 01:23:52,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:23:52,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:23:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:23:52,783 INFO L87 Difference]: Start difference. First operand 48 states and 72 transitions. Second operand 28 states. [2020-08-22 01:23:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:54,223 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2020-08-22 01:23:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:54,223 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 01:23:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:54,224 INFO L225 Difference]: With dead ends: 56 [2020-08-22 01:23:54,225 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 01:23:54,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 01:23:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 01:23:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-08-22 01:23:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 01:23:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 71 transitions. [2020-08-22 01:23:54,232 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 71 transitions. Word has length 79 [2020-08-22 01:23:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:54,232 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 71 transitions. [2020-08-22 01:23:54,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:23:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 71 transitions. [2020-08-22 01:23:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:23:54,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:54,234 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:54,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 01:23:54,234 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:54,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:54,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1525719705, now seen corresponding path program 32 times [2020-08-22 01:23:54,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:54,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684308812] [2020-08-22 01:23:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 01:23:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 01:23:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:23:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat