/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:25:53,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:25:53,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:25:53,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:25:53,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:25:53,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:25:53,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:25:53,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:25:53,653 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:25:53,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:25:53,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:25:53,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:25:53,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:25:53,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:25:53,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:25:53,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:25:53,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:25:53,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:25:53,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:25:53,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:25:53,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:25:53,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:25:53,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:25:53,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:25:53,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:25:53,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:25:53,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:25:53,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:25:53,687 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 [2020-09-21 10:25:53,714 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:25:53,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:25:53,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:25:53,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:25:53,716 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:25:53,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:25:53,716 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:25:53,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:25:53,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:25:53,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:25:53,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:25:53,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:25:53,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:25:53,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:25:53,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:25:53,718 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:25:53,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:25:53,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:25:53,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:25:53,719 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:25:53,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:25:53,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:25:53,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:25:53,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:25:53,720 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:25:53,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:25:53,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:25:53,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:25:53,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:25:53,721 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 -> false [2020-09-21 10:25:54,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:25:54,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:25:54,201 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:25:54,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:25:54,204 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:25:54,207 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-09-21 10:25:54,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1109e2271/2f53d2e3a44f4136921ced7d2a463172/FLAGdbdd29bd2 [2020-09-21 10:25:54,980 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:25:54,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-09-21 10:25:55,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1109e2271/2f53d2e3a44f4136921ced7d2a463172/FLAGdbdd29bd2 [2020-09-21 10:25:55,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1109e2271/2f53d2e3a44f4136921ced7d2a463172 [2020-09-21 10:25:55,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:25:55,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:25:55,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:25:55,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:25:55,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:25:55,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:25:55" (1/1) ... [2020-09-21 10:25:55,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbac012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:55, skipping insertion in model container [2020-09-21 10:25:55,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:25:55" (1/1) ... [2020-09-21 10:25:55,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:25:55,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:25:55,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:25:55,853 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:25:56,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:25:56,041 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:25:56,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56 WrapperNode [2020-09-21 10:25:56,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:25:56,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:25:56,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:25:56,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:25:56,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... [2020-09-21 10:25:56,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... [2020-09-21 10:25:56,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... [2020-09-21 10:25:56,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... [2020-09-21 10:25:56,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... [2020-09-21 10:25:56,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... [2020-09-21 10:25:56,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... [2020-09-21 10:25:56,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:25:56,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:25:56,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:25:56,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:25:56,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:25:56,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:25:56,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:25:56,396 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-21 10:25:56,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:25:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-21 10:25:56,397 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:25:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:25:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-21 10:25:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:25:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:25:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:25:57,884 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:25:57,885 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 10:25:57,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:25:57 BoogieIcfgContainer [2020-09-21 10:25:57,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:25:57,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:25:57,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:25:57,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:25:57,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:25:55" (1/3) ... [2020-09-21 10:25:57,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e25be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:25:57, skipping insertion in model container [2020-09-21 10:25:57,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:25:56" (2/3) ... [2020-09-21 10:25:57,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e25be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:25:57, skipping insertion in model container [2020-09-21 10:25:57,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:25:57" (3/3) ... [2020-09-21 10:25:57,903 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-09-21 10:25:57,917 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:25:57,927 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:25:57,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:25:57,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:25:57,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:25:57,982 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:25:57,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:25:57,982 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:25:57,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:25:57,983 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:25:57,983 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:25:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-09-21 10:25:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 10:25:58,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:25:58,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:25:58,022 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:25:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:25:58,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-09-21 10:25:58,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:25:58,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957209636] [2020-09-21 10:25:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:25:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:58,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:25:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:25:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:25:58,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957209636] [2020-09-21 10:25:58,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:25:58,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:25:58,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804790147] [2020-09-21 10:25:58,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:25:58,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:25:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:25:58,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:25:58,504 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-09-21 10:26:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:01,206 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-09-21 10:26:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:26:01,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-09-21 10:26:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:01,232 INFO L225 Difference]: With dead ends: 886 [2020-09-21 10:26:01,232 INFO L226 Difference]: Without dead ends: 564 [2020-09-21 10:26:01,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-09-21 10:26:01,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-09-21 10:26:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-09-21 10:26:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-09-21 10:26:01,345 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-09-21 10:26:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:01,346 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-09-21 10:26:01,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:26:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-09-21 10:26:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-21 10:26:01,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:01,353 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:01,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:26:01,353 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:01,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:01,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-09-21 10:26:01,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:01,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568280441] [2020-09-21 10:26:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:01,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:26:01,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568280441] [2020-09-21 10:26:01,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:26:01,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:26:01,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525124884] [2020-09-21 10:26:01,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:26:01,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:01,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:26:01,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:26:01,668 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-09-21 10:26:03,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:03,969 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-09-21 10:26:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:26:03,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-09-21 10:26:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:03,982 INFO L225 Difference]: With dead ends: 1320 [2020-09-21 10:26:03,984 INFO L226 Difference]: Without dead ends: 768 [2020-09-21 10:26:03,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:26:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-09-21 10:26:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-09-21 10:26:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-09-21 10:26:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-09-21 10:26:04,028 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-09-21 10:26:04,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:04,029 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-09-21 10:26:04,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:26:04,029 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-09-21 10:26:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-21 10:26:04,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:04,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:04,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:26:04,033 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:04,034 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-09-21 10:26:04,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:04,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355802572] [2020-09-21 10:26:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:04,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:04,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:26:04,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355802572] [2020-09-21 10:26:04,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:26:04,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 10:26:04,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753123560] [2020-09-21 10:26:04,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:26:04,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:26:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:26:04,429 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-09-21 10:26:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:06,523 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-09-21 10:26:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:26:06,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-09-21 10:26:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:06,540 INFO L225 Difference]: With dead ends: 1330 [2020-09-21 10:26:06,540 INFO L226 Difference]: Without dead ends: 770 [2020-09-21 10:26:06,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:26:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-09-21 10:26:06,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-09-21 10:26:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-09-21 10:26:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-09-21 10:26:06,599 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-09-21 10:26:06,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:06,601 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-09-21 10:26:06,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:26:06,601 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-09-21 10:26:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-09-21 10:26:06,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:06,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:06,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:26:06,622 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-09-21 10:26:06,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:06,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051599024] [2020-09-21 10:26:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:06,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:26:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-09-21 10:26:07,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051599024] [2020-09-21 10:26:07,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:07,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:26:07,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831921663] [2020-09-21 10:26:07,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:26:07,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:07,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:26:07,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:26:07,060 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-09-21 10:26:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:08,946 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-09-21 10:26:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:26:08,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-09-21 10:26:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:08,966 INFO L225 Difference]: With dead ends: 2246 [2020-09-21 10:26:08,967 INFO L226 Difference]: Without dead ends: 1498 [2020-09-21 10:26:08,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:26:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-09-21 10:26:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-09-21 10:26:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-09-21 10:26:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-09-21 10:26:09,041 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-09-21 10:26:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:09,043 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-09-21 10:26:09,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:26:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-09-21 10:26:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-21 10:26:09,049 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:09,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:09,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:26:09,050 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-09-21 10:26:09,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:09,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677337512] [2020-09-21 10:26:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:09,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:09,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:09,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-21 10:26:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:09,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-09-21 10:26:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:26:09,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677337512] [2020-09-21 10:26:09,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:09,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:09,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026994838] [2020-09-21 10:26:09,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:09,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:09,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:09,889 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-09-21 10:26:12,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:12,618 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-09-21 10:26:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:26:12,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-09-21 10:26:12,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:12,631 INFO L225 Difference]: With dead ends: 3081 [2020-09-21 10:26:12,631 INFO L226 Difference]: Without dead ends: 1734 [2020-09-21 10:26:12,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-21 10:26:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-09-21 10:26:12,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-09-21 10:26:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-09-21 10:26:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-09-21 10:26:12,695 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-09-21 10:26:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:12,696 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-09-21 10:26:12,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:12,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-09-21 10:26:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-09-21 10:26:12,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:12,705 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:12,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:26:12,705 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-09-21 10:26:12,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:12,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13374699] [2020-09-21 10:26:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:12,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:12,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:13,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:26:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:13,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-09-21 10:26:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-09-21 10:26:13,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13374699] [2020-09-21 10:26:13,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:13,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:26:13,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436667641] [2020-09-21 10:26:13,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:26:13,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:13,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:26:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:26:13,966 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-09-21 10:26:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:16,368 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-09-21 10:26:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:26:16,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-09-21 10:26:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:16,379 INFO L225 Difference]: With dead ends: 3607 [2020-09-21 10:26:16,379 INFO L226 Difference]: Without dead ends: 1923 [2020-09-21 10:26:16,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:26:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-09-21 10:26:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-09-21 10:26:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-09-21 10:26:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-09-21 10:26:16,437 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-09-21 10:26:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:16,438 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-09-21 10:26:16,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:26:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-09-21 10:26:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-09-21 10:26:16,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:16,445 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:16,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:26:16,446 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:16,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-09-21 10:26:16,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:16,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469382328] [2020-09-21 10:26:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-21 10:26:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-09-21 10:26:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-21 10:26:16,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469382328] [2020-09-21 10:26:16,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:16,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:16,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118943080] [2020-09-21 10:26:16,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:16,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:16,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:16,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:16,994 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-09-21 10:26:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:20,848 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-09-21 10:26:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:26:20,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-09-21 10:26:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:20,866 INFO L225 Difference]: With dead ends: 5807 [2020-09-21 10:26:20,866 INFO L226 Difference]: Without dead ends: 3550 [2020-09-21 10:26:20,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-21 10:26:20,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-09-21 10:26:20,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-09-21 10:26:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-09-21 10:26:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-09-21 10:26:20,958 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-09-21 10:26:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:20,958 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-09-21 10:26:20,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-09-21 10:26:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-09-21 10:26:21,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:21,010 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:21,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:26:21,010 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-09-21 10:26:21,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:21,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225684114] [2020-09-21 10:26:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-09-21 10:26:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-09-21 10:26:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-09-21 10:26:21,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225684114] [2020-09-21 10:26:21,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:21,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:26:21,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799253271] [2020-09-21 10:26:21,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:26:21,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:21,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:26:21,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:21,831 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-09-21 10:26:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:23,573 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-09-21 10:26:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:26:23,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-09-21 10:26:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:23,592 INFO L225 Difference]: With dead ends: 6928 [2020-09-21 10:26:23,592 INFO L226 Difference]: Without dead ends: 3938 [2020-09-21 10:26:23,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:26:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-09-21 10:26:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-09-21 10:26:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-09-21 10:26:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-09-21 10:26:23,736 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-09-21 10:26:23,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:23,737 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-09-21 10:26:23,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:23,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-09-21 10:26:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-09-21 10:26:23,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:23,762 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:23,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:26:23,763 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:23,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-09-21 10:26:23,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:23,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668522248] [2020-09-21 10:26:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:23,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:23,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:24,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:24,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:24,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:24,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-09-21 10:26:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-09-21 10:26:24,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668522248] [2020-09-21 10:26:24,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:24,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:26:24,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824037693] [2020-09-21 10:26:24,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:26:24,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:26:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:24,545 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-09-21 10:26:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:26,277 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-09-21 10:26:26,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:26:26,277 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-09-21 10:26:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:26,296 INFO L225 Difference]: With dead ends: 8034 [2020-09-21 10:26:26,296 INFO L226 Difference]: Without dead ends: 4484 [2020-09-21 10:26:26,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:26:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-09-21 10:26:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-09-21 10:26:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-09-21 10:26:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-09-21 10:26:26,409 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-09-21 10:26:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:26,410 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-09-21 10:26:26,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-09-21 10:26:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-09-21 10:26:26,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:26,424 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:26,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:26:26,425 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-09-21 10:26:26,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:26,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331356113] [2020-09-21 10:26:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:26,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-09-21 10:26:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:27,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-09-21 10:26:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:27,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-09-21 10:26:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:27,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-09-21 10:26:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-09-21 10:26:27,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331356113] [2020-09-21 10:26:27,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:27,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:26:27,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785508908] [2020-09-21 10:26:27,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:26:27,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:26:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:27,669 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-09-21 10:26:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:29,766 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-09-21 10:26:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:26:29,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-09-21 10:26:29,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:29,786 INFO L225 Difference]: With dead ends: 8817 [2020-09-21 10:26:29,786 INFO L226 Difference]: Without dead ends: 4494 [2020-09-21 10:26:29,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:26:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-09-21 10:26:29,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-09-21 10:26:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-09-21 10:26:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-09-21 10:26:29,900 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-09-21 10:26:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:29,901 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-09-21 10:26:29,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-09-21 10:26:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-09-21 10:26:29,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:29,923 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:29,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:26:29,923 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-09-21 10:26:29,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:29,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365915218] [2020-09-21 10:26:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-09-21 10:26:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-09-21 10:26:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-09-21 10:26:30,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365915218] [2020-09-21 10:26:30,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:30,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:26:30,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724931819] [2020-09-21 10:26:30,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:26:30,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:30,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:26:30,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:26:30,813 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-09-21 10:26:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:32,498 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-09-21 10:26:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:26:32,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-09-21 10:26:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:32,519 INFO L225 Difference]: With dead ends: 9674 [2020-09-21 10:26:32,519 INFO L226 Difference]: Without dead ends: 5398 [2020-09-21 10:26:32,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:26:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-09-21 10:26:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-09-21 10:26:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-09-21 10:26:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-09-21 10:26:32,632 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-09-21 10:26:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:32,633 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-09-21 10:26:32,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:26:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-09-21 10:26:32,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-09-21 10:26:32,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:32,650 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:32,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:26:32,650 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:32,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-09-21 10:26:32,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:32,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151233933] [2020-09-21 10:26:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:32,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:32,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:33,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-09-21 10:26:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:33,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-09-21 10:26:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:33,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-09-21 10:26:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:33,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-09-21 10:26:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-09-21 10:26:34,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151233933] [2020-09-21 10:26:34,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:34,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:34,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636279137] [2020-09-21 10:26:34,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:34,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:34,076 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-09-21 10:26:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:37,101 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-09-21 10:26:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:26:37,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-09-21 10:26:37,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:37,131 INFO L225 Difference]: With dead ends: 11142 [2020-09-21 10:26:37,131 INFO L226 Difference]: Without dead ends: 6124 [2020-09-21 10:26:37,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:26:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-09-21 10:26:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-09-21 10:26:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-09-21 10:26:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-09-21 10:26:37,252 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-09-21 10:26:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:37,253 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-09-21 10:26:37,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-09-21 10:26:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-09-21 10:26:37,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:37,271 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:37,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:26:37,271 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:37,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-09-21 10:26:37,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:37,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973084956] [2020-09-21 10:26:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-09-21 10:26:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:37,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-09-21 10:26:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:38,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-09-21 10:26:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-09-21 10:26:38,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973084956] [2020-09-21 10:26:38,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:38,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:26:38,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010442449] [2020-09-21 10:26:38,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:26:38,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:26:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:26:38,852 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-09-21 10:26:39,470 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-09-21 10:26:40,161 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-09-21 10:26:40,841 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-09-21 10:26:41,756 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-09-21 10:26:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:42,796 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-09-21 10:26:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 10:26:42,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-09-21 10:26:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:42,810 INFO L225 Difference]: With dead ends: 11324 [2020-09-21 10:26:42,811 INFO L226 Difference]: Without dead ends: 5758 [2020-09-21 10:26:42,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-09-21 10:26:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-09-21 10:26:42,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-09-21 10:26:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-09-21 10:26:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-09-21 10:26:42,928 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-09-21 10:26:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:42,929 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-09-21 10:26:42,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:26:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-09-21 10:26:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-09-21 10:26:42,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:42,947 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:42,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:26:42,947 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:42,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:42,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-09-21 10:26:42,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:42,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402236592] [2020-09-21 10:26:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-09-21 10:26:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-09-21 10:26:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-09-21 10:26:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-09-21 10:26:43,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402236592] [2020-09-21 10:26:43,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:26:43,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:26:43,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672705578] [2020-09-21 10:26:43,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:26:43,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:26:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:26:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:26:43,892 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-09-21 10:26:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:26:47,489 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-09-21 10:26:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 10:26:47,490 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-09-21 10:26:47,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:26:47,512 INFO L225 Difference]: With dead ends: 13170 [2020-09-21 10:26:47,513 INFO L226 Difference]: Without dead ends: 7602 [2020-09-21 10:26:47,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:26:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-09-21 10:26:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-09-21 10:26:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-09-21 10:26:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-09-21 10:26:47,661 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-09-21 10:26:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:26:47,662 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-09-21 10:26:47,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:26:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-09-21 10:26:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-09-21 10:26:47,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:26:47,701 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:26:47,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:26:47,702 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:26:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:26:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-09-21 10:26:47,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:26:47,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762930310] [2020-09-21 10:26:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:26:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:26:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 10:26:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-09-21 10:26:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-09-21 10:26:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-09-21 10:26:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-09-21 10:26:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-09-21 10:26:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:26:48,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-09-21 10:26:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat