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/Problem01_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:53:22,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:53:22,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:53:22,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:53:22,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:53:22,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:53:22,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:53:22,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:53:22,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:53:22,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:53:22,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:53:22,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:53:22,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:53:22,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:53:22,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:53:22,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:53:22,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:53:22,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:53:22,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:53:22,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:53:22,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:53:22,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:53:22,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:53:22,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:53:22,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:53:22,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:53:22,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:53:22,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:53:22,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:53:22,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:53:22,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:53:22,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:53:22,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:53:22,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:53:22,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:53:22,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:53:22,226 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 17:53:22,249 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:53:22,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:53:22,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:53:22,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:53:22,254 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:53:22,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:53:22,255 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:53:22,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:53:22,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:53:22,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:53:22,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:53:22,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:53:22,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:53:22,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:53:22,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:53:22,256 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:53:22,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:53:22,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:53:22,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:53:22,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:53:22,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:53:22,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:53:22,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:53:22,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:53:22,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:53:22,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:53:22,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:53:22,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:53:22,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:53:22,569 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:53:22,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:53:22,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:53:22,594 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:53:22,594 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:53:22,595 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-13 17:53:22,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c82715e/a499221de12349159d1e589889635894/FLAG87a28f5d6 [2019-10-13 17:53:23,290 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:53:23,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-13 17:53:23,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c82715e/a499221de12349159d1e589889635894/FLAG87a28f5d6 [2019-10-13 17:53:23,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14c82715e/a499221de12349159d1e589889635894 [2019-10-13 17:53:23,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:53:23,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:53:23,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:53:23,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:53:23,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:53:23,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:53:23" (1/1) ... [2019-10-13 17:53:23,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6509102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:23, skipping insertion in model container [2019-10-13 17:53:23,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:53:23" (1/1) ... [2019-10-13 17:53:23,635 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:53:23,696 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:53:24,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:53:24,242 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:53:24,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:53:24,423 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:53:24,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24 WrapperNode [2019-10-13 17:53:24,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:53:24,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:53:24,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:53:24,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:53:24,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (1/1) ... [2019-10-13 17:53:24,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (1/1) ... [2019-10-13 17:53:24,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (1/1) ... [2019-10-13 17:53:24,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (1/1) ... [2019-10-13 17:53:24,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (1/1) ... [2019-10-13 17:53:24,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (1/1) ... [2019-10-13 17:53:24,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (1/1) ... [2019-10-13 17:53:24,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:53:24,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:53:24,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:53:24,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:53:24,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (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 17:53:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:53:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:53:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:53:24,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:53:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:53:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:53:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:53:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:53:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:53:24,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:53:24,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:53:25,816 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:53:25,817 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:53:25,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:53:25 BoogieIcfgContainer [2019-10-13 17:53:25,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:53:25,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:53:25,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:53:25,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:53:25,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:53:23" (1/3) ... [2019-10-13 17:53:25,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b220b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:53:25, skipping insertion in model container [2019-10-13 17:53:25,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:53:24" (2/3) ... [2019-10-13 17:53:25,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b220b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:53:25, skipping insertion in model container [2019-10-13 17:53:25,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:53:25" (3/3) ... [2019-10-13 17:53:25,828 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label50.c [2019-10-13 17:53:25,838 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:53:25,847 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:53:25,859 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:53:25,886 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:53:25,886 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:53:25,886 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:53:25,886 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:53:25,886 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:53:25,886 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:53:25,887 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:53:25,887 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:53:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-13 17:53:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 17:53:25,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:25,921 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, 1, 1, 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 17:53:25,923 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1653547897, now seen corresponding path program 1 times [2019-10-13 17:53:25,934 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:25,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439408088] [2019-10-13 17:53:25,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:25,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:25,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:26,472 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 17:53:26,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439408088] [2019-10-13 17:53:26,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:53:26,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:53:26,475 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577450490] [2019-10-13 17:53:26,483 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:53:26,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:26,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:53:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:53:26,500 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 5 states. [2019-10-13 17:53:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:28,025 INFO L93 Difference]: Finished difference Result 557 states and 956 transitions. [2019-10-13 17:53:28,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:53:28,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2019-10-13 17:53:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:28,044 INFO L225 Difference]: With dead ends: 557 [2019-10-13 17:53:28,045 INFO L226 Difference]: Without dead ends: 286 [2019-10-13 17:53:28,052 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:53:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-10-13 17:53:28,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2019-10-13 17:53:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-10-13 17:53:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 402 transitions. [2019-10-13 17:53:28,132 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 402 transitions. Word has length 85 [2019-10-13 17:53:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:28,133 INFO L462 AbstractCegarLoop]: Abstraction has 280 states and 402 transitions. [2019-10-13 17:53:28,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:53:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 402 transitions. [2019-10-13 17:53:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 17:53:28,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:28,139 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:53:28,139 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:28,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2076475216, now seen corresponding path program 1 times [2019-10-13 17:53:28,143 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:28,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501218159] [2019-10-13 17:53:28,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:28,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:28,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:53:28,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501218159] [2019-10-13 17:53:28,408 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:53:28,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:53:28,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16293297] [2019-10-13 17:53:28,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:53:28,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:28,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:53:28,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:53:28,415 INFO L87 Difference]: Start difference. First operand 280 states and 402 transitions. Second operand 9 states. [2019-10-13 17:53:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:29,869 INFO L93 Difference]: Finished difference Result 713 states and 1049 transitions. [2019-10-13 17:53:29,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:53:29,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 95 [2019-10-13 17:53:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:29,875 INFO L225 Difference]: With dead ends: 713 [2019-10-13 17:53:29,876 INFO L226 Difference]: Without dead ends: 439 [2019-10-13 17:53:29,882 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:53:29,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2019-10-13 17:53:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 421. [2019-10-13 17:53:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2019-10-13 17:53:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 590 transitions. [2019-10-13 17:53:29,926 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 590 transitions. Word has length 95 [2019-10-13 17:53:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:29,926 INFO L462 AbstractCegarLoop]: Abstraction has 421 states and 590 transitions. [2019-10-13 17:53:29,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:53:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 590 transitions. [2019-10-13 17:53:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 17:53:29,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:29,930 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:53:29,931 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash -970621106, now seen corresponding path program 1 times [2019-10-13 17:53:29,931 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:29,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522064576] [2019-10-13 17:53:29,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:29,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:29,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:53:30,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522064576] [2019-10-13 17:53:30,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702726172] [2019-10-13 17:53:30,140 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 17:53:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:30,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:53:30,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:53:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:53:30,364 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:53:30,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:53:30,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787243033] [2019-10-13 17:53:30,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:53:30,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:30,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:53:30,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:53:30,367 INFO L87 Difference]: Start difference. First operand 421 states and 590 transitions. Second operand 3 states. [2019-10-13 17:53:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:30,910 INFO L93 Difference]: Finished difference Result 1247 states and 1789 transitions. [2019-10-13 17:53:30,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:53:30,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-13 17:53:30,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:30,917 INFO L225 Difference]: With dead ends: 1247 [2019-10-13 17:53:30,917 INFO L226 Difference]: Without dead ends: 832 [2019-10-13 17:53:30,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:53:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2019-10-13 17:53:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2019-10-13 17:53:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2019-10-13 17:53:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1102 transitions. [2019-10-13 17:53:30,964 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1102 transitions. Word has length 96 [2019-10-13 17:53:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:30,965 INFO L462 AbstractCegarLoop]: Abstraction has 832 states and 1102 transitions. [2019-10-13 17:53:30,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:53:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1102 transitions. [2019-10-13 17:53:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:53:30,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:30,970 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:53:31,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:53:31,177 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1409491302, now seen corresponding path program 1 times [2019-10-13 17:53:31,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:31,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118997280] [2019-10-13 17:53:31,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:31,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:31,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:53:31,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118997280] [2019-10-13 17:53:31,487 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:53:31,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 17:53:31,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048481977] [2019-10-13 17:53:31,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:53:31,488 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:53:31,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:53:31,489 INFO L87 Difference]: Start difference. First operand 832 states and 1102 transitions. Second operand 10 states. [2019-10-13 17:53:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:33,488 INFO L93 Difference]: Finished difference Result 1970 states and 2726 transitions. [2019-10-13 17:53:33,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:53:33,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 102 [2019-10-13 17:53:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:33,497 INFO L225 Difference]: With dead ends: 1970 [2019-10-13 17:53:33,498 INFO L226 Difference]: Without dead ends: 1144 [2019-10-13 17:53:33,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:53:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2019-10-13 17:53:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 981. [2019-10-13 17:53:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2019-10-13 17:53:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1235 transitions. [2019-10-13 17:53:33,556 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1235 transitions. Word has length 102 [2019-10-13 17:53:33,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:33,557 INFO L462 AbstractCegarLoop]: Abstraction has 981 states and 1235 transitions. [2019-10-13 17:53:33,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:53:33,557 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1235 transitions. [2019-10-13 17:53:33,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 17:53:33,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:33,564 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:53:33,565 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1605942605, now seen corresponding path program 1 times [2019-10-13 17:53:33,566 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:33,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499911168] [2019-10-13 17:53:33,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:33,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:33,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:53:33,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499911168] [2019-10-13 17:53:33,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051757091] [2019-10-13 17:53:33,799 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 17:53:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:33,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:53:33,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:53:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:53:33,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:53:33,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:53:33,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349118583] [2019-10-13 17:53:33,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:53:33,998 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:53:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:53:33,999 INFO L87 Difference]: Start difference. First operand 981 states and 1235 transitions. Second operand 11 states. [2019-10-13 17:53:34,764 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2019-10-13 17:53:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:39,368 INFO L93 Difference]: Finished difference Result 4730 states and 6236 transitions. [2019-10-13 17:53:39,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:53:39,369 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 113 [2019-10-13 17:53:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:39,390 INFO L225 Difference]: With dead ends: 4730 [2019-10-13 17:53:39,391 INFO L226 Difference]: Without dead ends: 2641 [2019-10-13 17:53:39,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:53:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2019-10-13 17:53:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1261. [2019-10-13 17:53:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1261 states. [2019-10-13 17:53:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1463 transitions. [2019-10-13 17:53:39,502 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1463 transitions. Word has length 113 [2019-10-13 17:53:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:39,504 INFO L462 AbstractCegarLoop]: Abstraction has 1261 states and 1463 transitions. [2019-10-13 17:53:39,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:53:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1463 transitions. [2019-10-13 17:53:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-13 17:53:39,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:39,509 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:53:39,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:53:39,715 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1161033580, now seen corresponding path program 1 times [2019-10-13 17:53:39,722 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:39,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46973959] [2019-10-13 17:53:39,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:39,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:39,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 83 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:53:40,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46973959] [2019-10-13 17:53:40,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673596248] [2019-10-13 17:53:40,071 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 17:53:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:40,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:53:40,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:53:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:53:40,278 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:53:40,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-13 17:53:40,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113687160] [2019-10-13 17:53:40,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:53:40,280 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:40,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:53:40,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:53:40,281 INFO L87 Difference]: Start difference. First operand 1261 states and 1463 transitions. Second operand 9 states. [2019-10-13 17:53:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:41,464 INFO L93 Difference]: Finished difference Result 3364 states and 3982 transitions. [2019-10-13 17:53:41,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:53:41,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 168 [2019-10-13 17:53:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:41,481 INFO L225 Difference]: With dead ends: 3364 [2019-10-13 17:53:41,482 INFO L226 Difference]: Without dead ends: 2109 [2019-10-13 17:53:41,485 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:53:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2019-10-13 17:53:41,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1827. [2019-10-13 17:53:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1827 states. [2019-10-13 17:53:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2148 transitions. [2019-10-13 17:53:41,544 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2148 transitions. Word has length 168 [2019-10-13 17:53:41,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:41,545 INFO L462 AbstractCegarLoop]: Abstraction has 1827 states and 2148 transitions. [2019-10-13 17:53:41,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:53:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2148 transitions. [2019-10-13 17:53:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 17:53:41,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:41,551 INFO L380 BasicCegarLoop]: trace histogram [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, 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 17:53:41,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:53:41,755 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash -724883434, now seen corresponding path program 1 times [2019-10-13 17:53:41,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:41,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175719773] [2019-10-13 17:53:41,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:41,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:41,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 123 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 17:53:42,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175719773] [2019-10-13 17:53:42,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013853660] [2019-10-13 17:53:42,015 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 17:53:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:42,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:53:42,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:53:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:53:42,257 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:53:42,257 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2019-10-13 17:53:42,258 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612126847] [2019-10-13 17:53:42,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:53:42,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:53:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:53:42,261 INFO L87 Difference]: Start difference. First operand 1827 states and 2148 transitions. Second operand 12 states. [2019-10-13 17:53:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:46,291 INFO L93 Difference]: Finished difference Result 5950 states and 7190 transitions. [2019-10-13 17:53:46,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:53:46,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 186 [2019-10-13 17:53:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:46,314 INFO L225 Difference]: With dead ends: 5950 [2019-10-13 17:53:46,314 INFO L226 Difference]: Without dead ends: 4129 [2019-10-13 17:53:46,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:53:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2019-10-13 17:53:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 3984. [2019-10-13 17:53:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3984 states. [2019-10-13 17:53:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3984 states to 3984 states and 4685 transitions. [2019-10-13 17:53:46,471 INFO L78 Accepts]: Start accepts. Automaton has 3984 states and 4685 transitions. Word has length 186 [2019-10-13 17:53:46,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:46,471 INFO L462 AbstractCegarLoop]: Abstraction has 3984 states and 4685 transitions. [2019-10-13 17:53:46,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:53:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3984 states and 4685 transitions. [2019-10-13 17:53:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-13 17:53:46,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:46,483 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 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] [2019-10-13 17:53:46,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:53:46,688 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1106544002, now seen corresponding path program 1 times [2019-10-13 17:53:46,689 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:46,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397231845] [2019-10-13 17:53:46,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:46,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:46,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 133 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 17:53:46,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397231845] [2019-10-13 17:53:46,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034250191] [2019-10-13 17:53:46,956 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 17:53:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:47,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:53:47,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:53:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:53:47,186 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:53:47,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:53:47,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269345187] [2019-10-13 17:53:47,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:53:47,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:47,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:53:47,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:53:47,189 INFO L87 Difference]: Start difference. First operand 3984 states and 4685 transitions. Second operand 11 states. [2019-10-13 17:53:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:49,797 INFO L93 Difference]: Finished difference Result 9219 states and 11473 transitions. [2019-10-13 17:53:49,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:53:49,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 193 [2019-10-13 17:53:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:49,827 INFO L225 Difference]: With dead ends: 9219 [2019-10-13 17:53:49,827 INFO L226 Difference]: Without dead ends: 5245 [2019-10-13 17:53:49,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:53:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2019-10-13 17:53:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 5209. [2019-10-13 17:53:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5209 states. [2019-10-13 17:53:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 6459 transitions. [2019-10-13 17:53:50,056 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 6459 transitions. Word has length 193 [2019-10-13 17:53:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:50,058 INFO L462 AbstractCegarLoop]: Abstraction has 5209 states and 6459 transitions. [2019-10-13 17:53:50,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:53:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 6459 transitions. [2019-10-13 17:53:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 17:53:50,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:50,080 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 17:53:50,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:53:50,284 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1841997458, now seen corresponding path program 1 times [2019-10-13 17:53:50,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:50,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380282744] [2019-10-13 17:53:50,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:50,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:50,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 156 proven. 4 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 17:53:50,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380282744] [2019-10-13 17:53:50,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662841327] [2019-10-13 17:53:50,577 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 17:53:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:50,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:53:50,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:53:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 17:53:50,916 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:53:50,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:53:50,917 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477841706] [2019-10-13 17:53:50,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:53:50,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:50,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:53:50,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:53:50,920 INFO L87 Difference]: Start difference. First operand 5209 states and 6459 transitions. Second operand 12 states. [2019-10-13 17:53:52,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:52,951 INFO L93 Difference]: Finished difference Result 9254 states and 11462 transitions. [2019-10-13 17:53:52,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:53:52,952 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 216 [2019-10-13 17:53:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:52,974 INFO L225 Difference]: With dead ends: 9254 [2019-10-13 17:53:52,974 INFO L226 Difference]: Without dead ends: 4186 [2019-10-13 17:53:52,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:53:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2019-10-13 17:53:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 4170. [2019-10-13 17:53:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2019-10-13 17:53:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 5032 transitions. [2019-10-13 17:53:53,200 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 5032 transitions. Word has length 216 [2019-10-13 17:53:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:53:53,200 INFO L462 AbstractCegarLoop]: Abstraction has 4170 states and 5032 transitions. [2019-10-13 17:53:53,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:53:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 5032 transitions. [2019-10-13 17:53:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-13 17:53:53,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:53:53,213 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:53:53,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:53:53,416 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:53:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:53:53,417 INFO L82 PathProgramCache]: Analyzing trace with hash 512536307, now seen corresponding path program 1 times [2019-10-13 17:53:53,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:53:53,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516607199] [2019-10-13 17:53:53,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:53,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:53:53,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:53:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 17:53:53,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516607199] [2019-10-13 17:53:53,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804065044] [2019-10-13 17:53:53,690 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 17:53:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:53:53,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:53:53,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:53:53,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:53:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:53:53,907 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:53:53,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:53:53,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634031011] [2019-10-13 17:53:53,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:53:53,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:53:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:53:53,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:53:53,911 INFO L87 Difference]: Start difference. First operand 4170 states and 5032 transitions. Second operand 11 states. [2019-10-13 17:53:54,360 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-10-13 17:53:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:53:57,400 INFO L93 Difference]: Finished difference Result 7813 states and 9809 transitions. [2019-10-13 17:53:57,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:53:57,400 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 218 [2019-10-13 17:53:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:53:57,423 INFO L225 Difference]: With dead ends: 7813 [2019-10-13 17:53:57,424 INFO L226 Difference]: Without dead ends: 3623 [2019-10-13 17:53:57,446 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:53:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states.