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/Problem16_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:28,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:28,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:28,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:28,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:28,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:28,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:28,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:28,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:28,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:28,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:28,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:28,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:28,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:28,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:28,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:28,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:28,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:28,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:28,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:28,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:28,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:28,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:28,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:28,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:28,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:28,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:28,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:28,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:28,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:28,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:28,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:28,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:28,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:28,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:28,802 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:28,807 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 [2019-10-14 22:04:28,826 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:28,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:28,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:28,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:28,828 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:28,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:28,829 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:28,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:28,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:28,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:28,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:28,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:28,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:28,830 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:28,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:28,831 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:28,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:28,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:28,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:28,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:28,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:28,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:28,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:28,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:28,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:28,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:28,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:28,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:28,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:29,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:29,178 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:29,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:29,184 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:29,185 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:29,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-14 22:04:29,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806ec2e12/c7345504f7e04ead807ffaf41b0b2d3d/FLAG817113944 [2019-10-14 22:04:29,933 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:29,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-14 22:04:29,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806ec2e12/c7345504f7e04ead807ffaf41b0b2d3d/FLAG817113944 [2019-10-14 22:04:30,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806ec2e12/c7345504f7e04ead807ffaf41b0b2d3d [2019-10-14 22:04:30,152 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:30,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:30,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:30,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:30,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:30,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:30" (1/1) ... [2019-10-14 22:04:30,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760969a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:30, skipping insertion in model container [2019-10-14 22:04:30,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:30" (1/1) ... [2019-10-14 22:04:30,173 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:30,258 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:31,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:31,325 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:31,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:31,656 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:31,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31 WrapperNode [2019-10-14 22:04:31,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:31,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:31,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:31,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:31,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (1/1) ... [2019-10-14 22:04:31,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (1/1) ... [2019-10-14 22:04:31,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (1/1) ... [2019-10-14 22:04:31,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (1/1) ... [2019-10-14 22:04:31,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (1/1) ... [2019-10-14 22:04:31,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (1/1) ... [2019-10-14 22:04:31,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (1/1) ... [2019-10-14 22:04:31,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:31,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:31,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:31,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:31,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (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 [2019-10-14 22:04:31,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:31,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:31,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:31,994 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:31,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:31,995 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:31,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:34,400 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:34,402 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:34,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:34 BoogieIcfgContainer [2019-10-14 22:04:34,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:34,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:34,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:34,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:30" (1/3) ... [2019-10-14 22:04:34,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557dad3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:34, skipping insertion in model container [2019-10-14 22:04:34,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:31" (2/3) ... [2019-10-14 22:04:34,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557dad3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:34, skipping insertion in model container [2019-10-14 22:04:34,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:34" (3/3) ... [2019-10-14 22:04:34,427 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label29.c [2019-10-14 22:04:34,437 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:34,445 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:34,457 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:34,486 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:34,487 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:34,487 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:34,487 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:34,487 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:34,487 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:34,487 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:34,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 22:04:34,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:34,526 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] [2019-10-14 22:04:34,528 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1301398987, now seen corresponding path program 1 times [2019-10-14 22:04:34,549 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:34,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522752741] [2019-10-14 22:04:34,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:34,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:34,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:35,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522752741] [2019-10-14 22:04:35,018 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:35,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:35,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545625783] [2019-10-14 22:04:35,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:35,026 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:35,043 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:40,257 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-14 22:04:40,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:40,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-14 22:04:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:40,290 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:40,290 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:40,304 INFO L600 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 [2019-10-14 22:04:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-14 22:04:40,441 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 52 [2019-10-14 22:04:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:40,443 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-14 22:04:40,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:40,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-14 22:04:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 22:04:40,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:40,463 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, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:40,464 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash -498419979, now seen corresponding path program 1 times [2019-10-14 22:04:40,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:40,465 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070423772] [2019-10-14 22:04:40,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:40,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:40,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 90 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:41,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070423772] [2019-10-14 22:04:41,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7776395] [2019-10-14 22:04:41,049 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 [2019-10-14 22:04:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:41,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-14 22:04:41,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:41,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-14 22:04:41,317 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049679808] [2019-10-14 22:04:41,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:41,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:41,321 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-14 22:04:44,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:44,837 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-10-14 22:04:44,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:44,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 234 [2019-10-14 22:04:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:44,848 INFO L225 Difference]: With dead ends: 3129 [2019-10-14 22:04:44,848 INFO L226 Difference]: Without dead ends: 2104 [2019-10-14 22:04:44,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-10-14 22:04:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-10-14 22:04:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-14 22:04:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-10-14 22:04:44,956 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 234 [2019-10-14 22:04:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:44,957 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-10-14 22:04:44,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-10-14 22:04:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-14 22:04:44,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:44,962 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:45,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:45,168 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:45,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:45,169 INFO L82 PathProgramCache]: Analyzing trace with hash 567814956, now seen corresponding path program 1 times [2019-10-14 22:04:45,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:45,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014659124] [2019-10-14 22:04:45,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:45,170 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:45,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 90 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:45,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014659124] [2019-10-14 22:04:45,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584437954] [2019-10-14 22:04:45,531 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 [2019-10-14 22:04:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:45,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-14 22:04:45,795 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:45,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:45,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648968072] [2019-10-14 22:04:45,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:45,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:45,798 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-10-14 22:04:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:48,768 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-10-14 22:04:48,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:48,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 269 [2019-10-14 22:04:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:48,797 INFO L225 Difference]: With dead ends: 6311 [2019-10-14 22:04:48,797 INFO L226 Difference]: Without dead ends: 4234 [2019-10-14 22:04:48,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-14 22:04:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-14 22:04:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-14 22:04:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5791 transitions. [2019-10-14 22:04:48,951 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5791 transitions. Word has length 269 [2019-10-14 22:04:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:48,953 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5791 transitions. [2019-10-14 22:04:48,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5791 transitions. [2019-10-14 22:04:48,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-14 22:04:48,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:48,960 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:04:49,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:49,166 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:49,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash -848339884, now seen corresponding path program 1 times [2019-10-14 22:04:49,168 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:49,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768851259] [2019-10-14 22:04:49,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:49,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:49,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 22:04:49,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768851259] [2019-10-14 22:04:49,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041568192] [2019-10-14 22:04:49,624 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 [2019-10-14 22:04:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:49,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:49,815 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:49,815 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:04:49,815 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354016919] [2019-10-14 22:04:49,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:04:49,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:49,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:04:49,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:49,817 INFO L87 Difference]: Start difference. First operand 4198 states and 5791 transitions. Second operand 12 states. [2019-10-14 22:04:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:57,025 INFO L93 Difference]: Finished difference Result 13272 states and 19292 transitions. [2019-10-14 22:04:57,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 22:04:57,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 281 [2019-10-14 22:04:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:57,076 INFO L225 Difference]: With dead ends: 13272 [2019-10-14 22:04:57,076 INFO L226 Difference]: Without dead ends: 7642 [2019-10-14 22:04:57,100 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:04:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-14 22:04:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 5899. [2019-10-14 22:04:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2019-10-14 22:04:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 6784 transitions. [2019-10-14 22:04:57,309 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 6784 transitions. Word has length 281 [2019-10-14 22:04:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:57,311 INFO L462 AbstractCegarLoop]: Abstraction has 5899 states and 6784 transitions. [2019-10-14 22:04:57,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:04:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 6784 transitions. [2019-10-14 22:04:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2019-10-14 22:04:57,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:57,332 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:57,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:57,536 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:57,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1589807869, now seen corresponding path program 1 times [2019-10-14 22:04:57,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:57,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705687951] [2019-10-14 22:04:57,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:57,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:57,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 180 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-14 22:04:58,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705687951] [2019-10-14 22:04:58,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315400727] [2019-10-14 22:04:58,472 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 [2019-10-14 22:04:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:58,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:58,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-10-14 22:04:59,009 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:59,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:59,010 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226568503] [2019-10-14 22:04:59,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:59,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:59,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:59,012 INFO L87 Difference]: Start difference. First operand 5899 states and 6784 transitions. Second operand 5 states. [2019-10-14 22:05:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:00,681 INFO L93 Difference]: Finished difference Result 13172 states and 15172 transitions. [2019-10-14 22:05:00,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:05:00,683 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 550 [2019-10-14 22:05:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:00,713 INFO L225 Difference]: With dead ends: 13172 [2019-10-14 22:05:00,713 INFO L226 Difference]: Without dead ends: 7279 [2019-10-14 22:05:00,728 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 554 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2019-10-14 22:05:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2019-10-14 22:05:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7261 states. [2019-10-14 22:05:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 8075 transitions. [2019-10-14 22:05:00,880 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 8075 transitions. Word has length 550 [2019-10-14 22:05:00,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:00,881 INFO L462 AbstractCegarLoop]: Abstraction has 7261 states and 8075 transitions. [2019-10-14 22:05:00,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 8075 transitions. [2019-10-14 22:05:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2019-10-14 22:05:00,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:00,913 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:01,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:01,118 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1655123335, now seen corresponding path program 1 times [2019-10-14 22:05:01,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:01,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133485189] [2019-10-14 22:05:01,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:01,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:01,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 300 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-14 22:05:02,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133485189] [2019-10-14 22:05:02,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506780765] [2019-10-14 22:05:02,393 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 [2019-10-14 22:05:02,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:02,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 674 proven. 2 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-10-14 22:05:02,960 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:02,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:02,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439998723] [2019-10-14 22:05:02,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:02,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:02,964 INFO L87 Difference]: Start difference. First operand 7261 states and 8075 transitions. Second operand 11 states.