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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:57,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:57,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:57,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:57,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:57,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:57,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:57,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:57,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:57,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:57,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:57,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:57,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:57,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:57,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:57,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:57,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:57,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:57,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:57,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:57,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:57,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:57,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:57,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:57,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:57,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:57,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:57,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:57,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:57,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:57,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:57,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:57,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:57,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:57,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:57,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:57,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:01:57,937 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:57,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:57,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:57,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:57,942 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:57,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:57,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:57,943 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:57,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:57,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:57,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:57,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:57,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:57,944 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:57,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:57,945 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:57,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:57,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:57,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:57,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:57,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:57,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:57,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:57,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:57,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:57,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:57,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:57,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:57,947 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:58,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:58,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:58,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:58,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:58,229 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:58,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-13 18:01:58,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8535ed79e/5226fa979e144538aad5e316a151cd0b/FLAG48c82dfee [2019-10-13 18:01:58,891 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:58,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label00.c [2019-10-13 18:01:58,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8535ed79e/5226fa979e144538aad5e316a151cd0b/FLAG48c82dfee [2019-10-13 18:01:59,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8535ed79e/5226fa979e144538aad5e316a151cd0b [2019-10-13 18:01:59,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:59,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:59,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:59,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:59,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:59,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59, skipping insertion in model container [2019-10-13 18:01:59,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,160 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:59,220 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:59,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:59,760 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:01:59,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:59,933 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:01:59,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59 WrapperNode [2019-10-13 18:01:59,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:59,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:01:59,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:01:59,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:01:59,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:02:00,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:02:00,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:02:00,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:02:00,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:00,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:00,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:00,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:00,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-13 18:02:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:00,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:00,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:00,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:01,646 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:01,646 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:01,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:01 BoogieIcfgContainer [2019-10-13 18:02:01,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:01,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:01,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:01,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:01,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:59" (1/3) ... [2019-10-13 18:02:01,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac75fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:01, skipping insertion in model container [2019-10-13 18:02:01,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (2/3) ... [2019-10-13 18:02:01,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac75fbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:01, skipping insertion in model container [2019-10-13 18:02:01,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:01" (3/3) ... [2019-10-13 18:02:01,656 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label00.c [2019-10-13 18:02:01,665 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:01,674 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:01,685 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:01,730 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:01,731 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:01,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:01,731 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:01,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:01,732 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:01,732 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:01,732 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 18:02:01,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:01,779 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:01,780 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:01,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash -837227006, now seen corresponding path program 1 times [2019-10-13 18:02:01,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:01,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093309473] [2019-10-13 18:02:01,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:01,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:01,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:02,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093309473] [2019-10-13 18:02:02,187 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:02,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:02,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514474262] [2019-10-13 18:02:02,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:02,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:02,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:02,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:02,210 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:04,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:04,362 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:02:04,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:04,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2019-10-13 18:02:04,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:04,386 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:02:04,386 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:04,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:02:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:02:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:02:04,532 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 59 [2019-10-13 18:02:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:04,534 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:02:04,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:02:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 18:02:04,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:04,550 INFO L380 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, 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] [2019-10-13 18:02:04,551 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1547926855, now seen corresponding path program 1 times [2019-10-13 18:02:04,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:04,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692461349] [2019-10-13 18:02:04,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:04,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:04,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:04,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692461349] [2019-10-13 18:02:04,868 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:04,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:04,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394184518] [2019-10-13 18:02:04,871 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:04,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:04,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:04,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:04,872 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:02:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:07,297 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-10-13 18:02:07,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:07,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 128 [2019-10-13 18:02:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:07,314 INFO L225 Difference]: With dead ends: 2246 [2019-10-13 18:02:07,315 INFO L226 Difference]: Without dead ends: 1694 [2019-10-13 18:02:07,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-13 18:02:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1128. [2019-10-13 18:02:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-10-13 18:02:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1732 transitions. [2019-10-13 18:02:07,409 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1732 transitions. Word has length 128 [2019-10-13 18:02:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:07,410 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1732 transitions. [2019-10-13 18:02:07,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1732 transitions. [2019-10-13 18:02:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-13 18:02:07,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:07,413 INFO L380 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, 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] [2019-10-13 18:02:07,413 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:07,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:07,413 INFO L82 PathProgramCache]: Analyzing trace with hash -186094754, now seen corresponding path program 1 times [2019-10-13 18:02:07,414 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:07,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067706183] [2019-10-13 18:02:07,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:07,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:07,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:07,667 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067706183] [2019-10-13 18:02:07,668 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:07,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:07,668 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350644261] [2019-10-13 18:02:07,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:07,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:07,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:07,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:07,670 INFO L87 Difference]: Start difference. First operand 1128 states and 1732 transitions. Second operand 8 states. [2019-10-13 18:02:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:09,439 INFO L93 Difference]: Finished difference Result 2856 states and 4565 transitions. [2019-10-13 18:02:09,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:02:09,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2019-10-13 18:02:09,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:09,457 INFO L225 Difference]: With dead ends: 2856 [2019-10-13 18:02:09,458 INFO L226 Difference]: Without dead ends: 1734 [2019-10-13 18:02:09,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:02:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2019-10-13 18:02:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1706. [2019-10-13 18:02:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2019-10-13 18:02:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2406 transitions. [2019-10-13 18:02:09,539 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2406 transitions. Word has length 129 [2019-10-13 18:02:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:09,541 INFO L462 AbstractCegarLoop]: Abstraction has 1706 states and 2406 transitions. [2019-10-13 18:02:09,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2406 transitions. [2019-10-13 18:02:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 18:02:09,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:09,543 INFO L380 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, 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] [2019-10-13 18:02:09,544 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash -547188926, now seen corresponding path program 1 times [2019-10-13 18:02:09,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:09,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549576608] [2019-10-13 18:02:09,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:09,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:09,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:09,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549576608] [2019-10-13 18:02:09,739 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:09,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:09,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500224146] [2019-10-13 18:02:09,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:09,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:09,741 INFO L87 Difference]: Start difference. First operand 1706 states and 2406 transitions. Second operand 8 states. [2019-10-13 18:02:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:11,465 INFO L93 Difference]: Finished difference Result 4298 states and 6640 transitions. [2019-10-13 18:02:11,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:11,465 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2019-10-13 18:02:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:11,485 INFO L225 Difference]: With dead ends: 4298 [2019-10-13 18:02:11,485 INFO L226 Difference]: Without dead ends: 2598 [2019-10-13 18:02:11,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2019-10-13 18:02:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2460. [2019-10-13 18:02:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2460 states. [2019-10-13 18:02:11,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3319 transitions. [2019-10-13 18:02:11,600 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3319 transitions. Word has length 131 [2019-10-13 18:02:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:11,600 INFO L462 AbstractCegarLoop]: Abstraction has 2460 states and 3319 transitions. [2019-10-13 18:02:11,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3319 transitions. [2019-10-13 18:02:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 18:02:11,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:11,602 INFO L380 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, 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] [2019-10-13 18:02:11,603 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:11,603 INFO L82 PathProgramCache]: Analyzing trace with hash -252421119, now seen corresponding path program 1 times [2019-10-13 18:02:11,603 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:11,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025295824] [2019-10-13 18:02:11,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:11,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:11,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:11,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025295824] [2019-10-13 18:02:11,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727963863] [2019-10-13 18:02:11,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:11,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:11,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:11,910 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:11,910 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:11,910 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786097105] [2019-10-13 18:02:11,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:11,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:11,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:11,912 INFO L87 Difference]: Start difference. First operand 2460 states and 3319 transitions. Second operand 3 states. [2019-10-13 18:02:12,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:12,730 INFO L93 Difference]: Finished difference Result 5650 states and 7629 transitions. [2019-10-13 18:02:12,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:12,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-13 18:02:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:12,745 INFO L225 Difference]: With dead ends: 5650 [2019-10-13 18:02:12,746 INFO L226 Difference]: Without dead ends: 3196 [2019-10-13 18:02:12,752 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2019-10-13 18:02:12,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2826. [2019-10-13 18:02:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2826 states. [2019-10-13 18:02:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 3795 transitions. [2019-10-13 18:02:12,828 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 3795 transitions. Word has length 132 [2019-10-13 18:02:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:12,829 INFO L462 AbstractCegarLoop]: Abstraction has 2826 states and 3795 transitions. [2019-10-13 18:02:12,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 3795 transitions. [2019-10-13 18:02:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-13 18:02:12,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:12,835 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:13,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:13,040 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:13,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:13,041 INFO L82 PathProgramCache]: Analyzing trace with hash -215391879, now seen corresponding path program 1 times [2019-10-13 18:02:13,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:13,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280392340] [2019-10-13 18:02:13,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:13,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:13,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:13,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280392340] [2019-10-13 18:02:13,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236364491] [2019-10-13 18:02:13,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:13,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:13,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:13,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:13,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:13,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648785760] [2019-10-13 18:02:13,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:13,531 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:13,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:13,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:13,531 INFO L87 Difference]: Start difference. First operand 2826 states and 3795 transitions. Second operand 3 states. [2019-10-13 18:02:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:14,306 INFO L93 Difference]: Finished difference Result 6018 states and 8242 transitions. [2019-10-13 18:02:14,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:14,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 224 [2019-10-13 18:02:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:14,326 INFO L225 Difference]: With dead ends: 6018 [2019-10-13 18:02:14,326 INFO L226 Difference]: Without dead ends: 3380 [2019-10-13 18:02:14,334 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2019-10-13 18:02:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 2834. [2019-10-13 18:02:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-13 18:02:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3761 transitions. [2019-10-13 18:02:14,408 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3761 transitions. Word has length 224 [2019-10-13 18:02:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:14,411 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3761 transitions. [2019-10-13 18:02:14,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3761 transitions. [2019-10-13 18:02:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-10-13 18:02:14,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:14,419 INFO L380 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, 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, 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] [2019-10-13 18:02:14,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:14,623 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1818380737, now seen corresponding path program 1 times [2019-10-13 18:02:14,624 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:14,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549460977] [2019-10-13 18:02:14,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:14,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:14,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 18:02:14,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549460977] [2019-10-13 18:02:14,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063576974] [2019-10-13 18:02:14,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:15,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 18:02:15,111 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:15,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:15,111 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546387790] [2019-10-13 18:02:15,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:15,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:15,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:15,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:15,113 INFO L87 Difference]: Start difference. First operand 2834 states and 3761 transitions. Second operand 3 states. [2019-10-13 18:02:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:15,867 INFO L93 Difference]: Finished difference Result 5478 states and 7312 transitions. [2019-10-13 18:02:15,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:15,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 288 [2019-10-13 18:02:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:15,880 INFO L225 Difference]: With dead ends: 5478 [2019-10-13 18:02:15,880 INFO L226 Difference]: Without dead ends: 2834 [2019-10-13 18:02:15,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2019-10-13 18:02:15,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2652. [2019-10-13 18:02:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2019-10-13 18:02:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3497 transitions. [2019-10-13 18:02:15,957 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3497 transitions. Word has length 288 [2019-10-13 18:02:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:15,958 INFO L462 AbstractCegarLoop]: Abstraction has 2652 states and 3497 transitions. [2019-10-13 18:02:15,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3497 transitions. [2019-10-13 18:02:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-10-13 18:02:15,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:15,971 INFO L380 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, 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, 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] [2019-10-13 18:02:16,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:16,175 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:16,175 INFO L82 PathProgramCache]: Analyzing trace with hash 382896273, now seen corresponding path program 1 times [2019-10-13 18:02:16,176 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:16,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748763153] [2019-10-13 18:02:16,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:16,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:16,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 163 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:16,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748763153] [2019-10-13 18:02:16,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428000805] [2019-10-13 18:02:16,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:16,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:17,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 18:02:17,188 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:17,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-13 18:02:17,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529903499] [2019-10-13 18:02:17,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:17,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:17,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:02:17,191 INFO L87 Difference]: Start difference. First operand 2652 states and 3497 transitions. Second operand 5 states. [2019-10-13 18:02:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:18,417 INFO L93 Difference]: Finished difference Result 5142 states and 6841 transitions. [2019-10-13 18:02:18,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:18,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2019-10-13 18:02:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:18,428 INFO L225 Difference]: With dead ends: 5142 [2019-10-13 18:02:18,429 INFO L226 Difference]: Without dead ends: 2680 [2019-10-13 18:02:18,435 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2019-10-13 18:02:18,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2666. [2019-10-13 18:02:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2666 states. [2019-10-13 18:02:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3480 transitions. [2019-10-13 18:02:18,492 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3480 transitions. Word has length 324 [2019-10-13 18:02:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:18,493 INFO L462 AbstractCegarLoop]: Abstraction has 2666 states and 3480 transitions. [2019-10-13 18:02:18,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3480 transitions. [2019-10-13 18:02:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-13 18:02:18,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:18,505 INFO L380 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, 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, 2, 2, 2, 2, 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] [2019-10-13 18:02:18,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:18,709 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:18,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1608334599, now seen corresponding path program 1 times [2019-10-13 18:02:18,710 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:18,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778060028] [2019-10-13 18:02:18,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:18,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:18,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 166 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:19,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778060028] [2019-10-13 18:02:19,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004135667] [2019-10-13 18:02:19,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:20,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:20,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:20,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 330 proven. 53 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 18:02:20,421 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:20,421 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:20,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713793975] [2019-10-13 18:02:20,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:20,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:20,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:20,423 INFO L87 Difference]: Start difference. First operand 2666 states and 3480 transitions. Second operand 16 states. [2019-10-13 18:02:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:24,455 INFO L93 Difference]: Finished difference Result 5260 states and 6928 transitions. [2019-10-13 18:02:24,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:02:24,456 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 408 [2019-10-13 18:02:24,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:24,466 INFO L225 Difference]: With dead ends: 5260 [2019-10-13 18:02:24,466 INFO L226 Difference]: Without dead ends: 2733 [2019-10-13 18:02:24,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:02:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2019-10-13 18:02:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2660. [2019-10-13 18:02:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2660 states. [2019-10-13 18:02:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 3229 transitions. [2019-10-13 18:02:24,526 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 3229 transitions. Word has length 408 [2019-10-13 18:02:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:24,527 INFO L462 AbstractCegarLoop]: Abstraction has 2660 states and 3229 transitions. [2019-10-13 18:02:24,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:02:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 3229 transitions. [2019-10-13 18:02:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2019-10-13 18:02:24,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:24,542 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:24,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:24,747 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2012438250, now seen corresponding path program 1 times [2019-10-13 18:02:24,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:24,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780103622] [2019-10-13 18:02:24,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:24,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:24,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 434 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:02:25,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780103622] [2019-10-13 18:02:25,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183618248] [2019-10-13 18:02:25,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:02:25,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 706 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2019-10-13 18:02:26,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:26,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:02:26,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316984882] [2019-10-13 18:02:26,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:26,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:26,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:26,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:26,157 INFO L87 Difference]: Start difference. First operand 2660 states and 3229 transitions. Second operand 9 states. [2019-10-13 18:02:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:28,189 INFO L93 Difference]: Finished difference Result 5320 states and 6462 transitions. [2019-10-13 18:02:28,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:02:28,191 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 543 [2019-10-13 18:02:28,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:28,201 INFO L225 Difference]: With dead ends: 5320 [2019-10-13 18:02:28,202 INFO L226 Difference]: Without dead ends: 2850 [2019-10-13 18:02:28,207 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 556 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2019-10-13 18:02:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2664. [2019-10-13 18:02:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2019-10-13 18:02:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3080 transitions. [2019-10-13 18:02:28,268 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3080 transitions. Word has length 543 [2019-10-13 18:02:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:28,269 INFO L462 AbstractCegarLoop]: Abstraction has 2664 states and 3080 transitions. [2019-10-13 18:02:28,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3080 transitions. [2019-10-13 18:02:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2019-10-13 18:02:28,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:28,319 INFO L380 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:28,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:28,520 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash 410369790, now seen corresponding path program 1 times [2019-10-13 18:02:28,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:28,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022236086] [2019-10-13 18:02:28,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 578 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:02:29,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022236086] [2019-10-13 18:02:29,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926026314] [2019-10-13 18:02:29,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:02:30,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:30,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1255 backedges. 929 proven. 2 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-13 18:02:30,493 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:30,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:02:30,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650954253] [2019-10-13 18:02:30,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:02:30,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:30,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:02:30,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:30,496 INFO L87 Difference]: Start difference. First operand 2664 states and 3080 transitions. Second operand 12 states. [2019-10-13 18:02:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:32,478 INFO L93 Difference]: Finished difference Result 5424 states and 6288 transitions. [2019-10-13 18:02:32,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:32,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 627 [2019-10-13 18:02:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:32,488 INFO L225 Difference]: With dead ends: 5424 [2019-10-13 18:02:32,489 INFO L226 Difference]: Without dead ends: 2909 [2019-10-13 18:02:32,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 646 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:02:32,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2019-10-13 18:02:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2658. [2019-10-13 18:02:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2658 states. [2019-10-13 18:02:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 2969 transitions. [2019-10-13 18:02:32,538 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 2969 transitions. Word has length 627 [2019-10-13 18:02:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:32,539 INFO L462 AbstractCegarLoop]: Abstraction has 2658 states and 2969 transitions. [2019-10-13 18:02:32,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:02:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 2969 transitions. [2019-10-13 18:02:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2019-10-13 18:02:32,548 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:32,549 INFO L380 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, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2019-10-13 18:02:32,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:32,757 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash -625078614, now seen corresponding path program 2 times [2019-10-13 18:02:32,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:32,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22528212] [2019-10-13 18:02:32,758 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 801 proven. 236 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-10-13 18:02:33,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22528212] [2019-10-13 18:02:33,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827481203] [2019-10-13 18:02:33,850 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:34,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:02:34,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:02:34,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:02:34,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:34,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 981 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2019-10-13 18:02:34,407 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:34,407 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:02:34,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089923220] [2019-10-13 18:02:34,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:02:34,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:34,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:02:34,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:34,410 INFO L87 Difference]: Start difference. First operand 2658 states and 2969 transitions. Second operand 17 states.