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/Problem03_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:23,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:23,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:23,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:23,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:23,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:23,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:23,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:23,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:23,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:23,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:23,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:23,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:23,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:23,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:23,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:23,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:23,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:23,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:23,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:23,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:23,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:23,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:23,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:23,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:55:23,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:23,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:23,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:23,855 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 17:55:23,869 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:23,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:23,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:23,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:23,871 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:23,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:23,871 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:23,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:23,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:23,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:23,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:23,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:23,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:23,873 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:23,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:23,873 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:23,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:23,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:23,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:23,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:23,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:23,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:23,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:23,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:23,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:23,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:23,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:23,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:23,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:24,224 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:24,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:24,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:24,255 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:24,255 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:24,256 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label29.c [2019-10-13 17:55:24,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1304e36de/8c420fa0a9e1405288acdaf776607b26/FLAG28aa45d51 [2019-10-13 17:55:25,013 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:25,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label29.c [2019-10-13 17:55:25,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1304e36de/8c420fa0a9e1405288acdaf776607b26/FLAG28aa45d51 [2019-10-13 17:55:25,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1304e36de/8c420fa0a9e1405288acdaf776607b26 [2019-10-13 17:55:25,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:25,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:25,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:25,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:25,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:25,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:25" (1/1) ... [2019-10-13 17:55:25,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b6da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:25, skipping insertion in model container [2019-10-13 17:55:25,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:25" (1/1) ... [2019-10-13 17:55:25,218 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:25,310 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:26,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:26,204 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:26,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:26,590 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:26,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26 WrapperNode [2019-10-13 17:55:26,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:26,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:26,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:26,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:26,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (1/1) ... [2019-10-13 17:55:26,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:26,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:26,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:26,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:26,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (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 17:55:26,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:26,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:26,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:26,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:26,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:26,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:26,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:26,860 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:26,861 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:26,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:26,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:28,840 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:28,841 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:28,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:28 BoogieIcfgContainer [2019-10-13 17:55:28,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:28,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:28,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:28,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:28,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:25" (1/3) ... [2019-10-13 17:55:28,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a4e7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:28, skipping insertion in model container [2019-10-13 17:55:28,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:26" (2/3) ... [2019-10-13 17:55:28,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a4e7f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:28, skipping insertion in model container [2019-10-13 17:55:28,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:28" (3/3) ... [2019-10-13 17:55:28,852 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label29.c [2019-10-13 17:55:28,862 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:28,871 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:28,884 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:28,920 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:28,921 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:28,921 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:28,921 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:28,921 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:28,922 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:28,922 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:28,922 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-13 17:55:28,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:28,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:28,980 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:28,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash -30261395, now seen corresponding path program 1 times [2019-10-13 17:55:29,000 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:29,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243456879] [2019-10-13 17:55:29,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:29,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:29,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:30,063 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:30,215 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 17:55:30,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243456879] [2019-10-13 17:55:30,217 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:30,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:30,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499047547] [2019-10-13 17:55:30,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:30,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:30,242 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:30,468 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:33,823 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-13 17:55:33,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:55:33,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 184 [2019-10-13 17:55:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:33,857 INFO L225 Difference]: With dead ends: 845 [2019-10-13 17:55:33,858 INFO L226 Difference]: Without dead ends: 470 [2019-10-13 17:55:33,866 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:55:33,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-13 17:55:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-13 17:55:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-13 17:55:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-13 17:55:33,963 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 184 [2019-10-13 17:55:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:33,968 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-13 17:55:33,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-13 17:55:33,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-13 17:55:33,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:33,985 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:33,985 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash 451298250, now seen corresponding path program 1 times [2019-10-13 17:55:33,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:33,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792741124] [2019-10-13 17:55:33,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:33,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:33,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:34,241 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:34,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792741124] [2019-10-13 17:55:34,437 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:34,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:34,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959184471] [2019-10-13 17:55:34,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:34,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:34,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:34,441 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-13 17:55:34,610 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:37,507 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:55:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:38,221 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-13 17:55:38,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:55:38,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 193 [2019-10-13 17:55:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:38,231 INFO L225 Difference]: With dead ends: 1407 [2019-10-13 17:55:38,231 INFO L226 Difference]: Without dead ends: 949 [2019-10-13 17:55:38,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:55:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-13 17:55:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-13 17:55:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-13 17:55:38,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-13 17:55:38,341 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 193 [2019-10-13 17:55:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:38,341 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-13 17:55:38,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-13 17:55:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-13 17:55:38,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:38,346 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:38,346 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:38,347 INFO L82 PathProgramCache]: Analyzing trace with hash -82776871, now seen corresponding path program 1 times [2019-10-13 17:55:38,347 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:38,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069231112] [2019-10-13 17:55:38,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:38,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:38,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:38,683 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:38,815 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 17:55:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:39,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069231112] [2019-10-13 17:55:39,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471045588] [2019-10-13 17:55:39,034 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 17:55:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:39,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:55:39,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:39,387 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:39,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2019-10-13 17:55:39,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25036677] [2019-10-13 17:55:39,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:39,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:55:39,389 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-13 17:55:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:41,097 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-13 17:55:41,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:41,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 196 [2019-10-13 17:55:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:41,111 INFO L225 Difference]: With dead ends: 2749 [2019-10-13 17:55:41,111 INFO L226 Difference]: Without dead ends: 1850 [2019-10-13 17:55:41,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:55:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-13 17:55:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-13 17:55:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-13 17:55:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-10-13 17:55:41,181 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 196 [2019-10-13 17:55:41,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:41,181 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-10-13 17:55:41,182 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-10-13 17:55:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-13 17:55:41,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:41,189 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:41,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:41,395 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1936411885, now seen corresponding path program 1 times [2019-10-13 17:55:41,396 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:41,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491368070] [2019-10-13 17:55:41,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:41,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:41,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,632 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,809 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 17:55:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:55:41,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491368070] [2019-10-13 17:55:41,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322831171] [2019-10-13 17:55:41,932 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 17:55:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:42,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:55:42,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:55:42,314 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:42,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 17:55:42,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878717557] [2019-10-13 17:55:42,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:42,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:42,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:42,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:42,317 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-10-13 17:55:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:43,918 INFO L93 Difference]: Finished difference Result 5485 states and 9340 transitions. [2019-10-13 17:55:43,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:55:43,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 203 [2019-10-13 17:55:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:43,946 INFO L225 Difference]: With dead ends: 5485 [2019-10-13 17:55:43,946 INFO L226 Difference]: Without dead ends: 3675 [2019-10-13 17:55:43,953 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:55:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2019-10-13 17:55:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3599. [2019-10-13 17:55:44,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-10-13 17:55:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5610 transitions. [2019-10-13 17:55:44,098 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5610 transitions. Word has length 203 [2019-10-13 17:55:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:44,098 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5610 transitions. [2019-10-13 17:55:44,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5610 transitions. [2019-10-13 17:55:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-13 17:55:44,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:44,112 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:44,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:44,316 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:44,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1189283813, now seen corresponding path program 1 times [2019-10-13 17:55:44,317 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:44,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142159662] [2019-10-13 17:55:44,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,317 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,565 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,685 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 17:55:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:44,816 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 17:55:44,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142159662] [2019-10-13 17:55:44,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356254632] [2019-10-13 17:55:44,817 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 17:55:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:45,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:55:45,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 17:55:45,176 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:55:45,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:55:45,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455300484] [2019-10-13 17:55:45,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:55:45,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:45,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:55:45,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:55:45,179 INFO L87 Difference]: Start difference. First operand 3599 states and 5610 transitions. Second operand 11 states. [2019-10-13 17:55:45,374 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:45,701 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:46,116 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:46,545 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-13 17:55:48,913 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:57,709 INFO L93 Difference]: Finished difference Result 15053 states and 30169 transitions. [2019-10-13 17:55:57,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 17:55:57,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 214 [2019-10-13 17:55:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:57,819 INFO L225 Difference]: With dead ends: 15053 [2019-10-13 17:55:57,819 INFO L226 Difference]: Without dead ends: 11460 [2019-10-13 17:55:57,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:55:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-13 17:55:58,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-10-13 17:55:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-10-13 17:55:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18327 transitions. [2019-10-13 17:55:58,500 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18327 transitions. Word has length 214 [2019-10-13 17:55:58,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:58,501 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18327 transitions. [2019-10-13 17:55:58,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:55:58,501 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18327 transitions. [2019-10-13 17:55:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 17:55:58,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:58,579 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:58,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:55:58,792 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:58,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:58,792 INFO L82 PathProgramCache]: Analyzing trace with hash 381120597, now seen corresponding path program 1 times [2019-10-13 17:55:58,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:58,793 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918911599] [2019-10-13 17:55:58,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:58,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:58,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,020 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:55:59,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918911599] [2019-10-13 17:55:59,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563869435] [2019-10-13 17:55:59,352 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 17:55:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:59,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:55:59,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:55:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:55:59,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:55:59,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:55:59,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249890139] [2019-10-13 17:55:59,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:55:59,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:59,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:55:59,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:55:59,640 INFO L87 Difference]: Start difference. First operand 11174 states and 18327 transitions. Second operand 3 states.