java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:17,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:17,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:17,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:17,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:17,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:17,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:17,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:17,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:17,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:17,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:17,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:17,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:17,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:17,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:17,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:17,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:17,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:17,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:17,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:17,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:17,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:17,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:17,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:17,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:17,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:17,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:17,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:17,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:17,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:17,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:17,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:17,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:17,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:17,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:17,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:17,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:02:17,818 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:17,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:17,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:17,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:17,821 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:17,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:17,821 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:17,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:17,821 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:17,821 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:17,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:17,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:17,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:17,823 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:17,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:17,824 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:17,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:17,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:17,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:17,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:17,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:17,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:17,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:17,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:17,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:17,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:17,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:17,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:17,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:18,117 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:18,141 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:18,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:18,146 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:18,147 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:18,147 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-13 18:02:18,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43bffe90/21eb9360ecca4b73b617b541220ceb64/FLAG61b7f66c6 [2019-10-13 18:02:18,803 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:18,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label14.c [2019-10-13 18:02:18,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43bffe90/21eb9360ecca4b73b617b541220ceb64/FLAG61b7f66c6 [2019-10-13 18:02:19,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f43bffe90/21eb9360ecca4b73b617b541220ceb64 [2019-10-13 18:02:19,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:19,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:19,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:19,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:19,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:19,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:19,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f69be82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19, skipping insertion in model container [2019-10-13 18:02:19,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:19,103 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:19,165 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:19,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:19,720 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:19,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:19,907 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:19,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19 WrapperNode [2019-10-13 18:02:19,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:19,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:19,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:19,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:19,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:19,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:19,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:19,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:20,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:20,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:20,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:20,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:20,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:20,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:20,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:20,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:20,155 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:20,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:21,668 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:21,669 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:21,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:21 BoogieIcfgContainer [2019-10-13 18:02:21,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:21,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:21,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:21,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:21,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:19" (1/3) ... [2019-10-13 18:02:21,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e642f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:21, skipping insertion in model container [2019-10-13 18:02:21,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19" (2/3) ... [2019-10-13 18:02:21,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e642f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:21, skipping insertion in model container [2019-10-13 18:02:21,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:21" (3/3) ... [2019-10-13 18:02:21,682 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label14.c [2019-10-13 18:02:21,692 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:21,701 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:21,713 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:21,742 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:21,742 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:21,742 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:21,742 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:21,742 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:21,743 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:21,743 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:21,743 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 18:02:21,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:21,785 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] [2019-10-13 18:02:21,787 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2013862189, now seen corresponding path program 1 times [2019-10-13 18:02:21,800 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:21,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966118845] [2019-10-13 18:02:21,800 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:21,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:21,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:22,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966118845] [2019-10-13 18:02:22,184 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:22,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:22,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786386551] [2019-10-13 18:02:22,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:22,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:22,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:22,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:22,215 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:25,027 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-13 18:02:25,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:25,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-13 18:02:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:25,049 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:02:25,049 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:25,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:25,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-13 18:02:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-13 18:02:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 812 transitions. [2019-10-13 18:02:25,183 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 812 transitions. Word has length 32 [2019-10-13 18:02:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:25,183 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 812 transitions. [2019-10-13 18:02:25,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 812 transitions. [2019-10-13 18:02:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 18:02:25,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:25,192 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:25,192 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1275083330, now seen corresponding path program 1 times [2019-10-13 18:02:25,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:25,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015561190] [2019-10-13 18:02:25,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:25,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015561190] [2019-10-13 18:02:25,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280397020] [2019-10-13 18:02:25,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:25,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:25,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:25,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:25,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712686390] [2019-10-13 18:02:25,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:25,821 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:25,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:25,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:25,822 INFO L87 Difference]: Start difference. First operand 560 states and 812 transitions. Second operand 3 states. [2019-10-13 18:02:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:26,749 INFO L93 Difference]: Finished difference Result 1666 states and 2449 transitions. [2019-10-13 18:02:26,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:26,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-10-13 18:02:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:26,761 INFO L225 Difference]: With dead ends: 1666 [2019-10-13 18:02:26,761 INFO L226 Difference]: Without dead ends: 1112 [2019-10-13 18:02:26,764 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-13 18:02:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-13 18:02:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-13 18:02:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1563 transitions. [2019-10-13 18:02:26,816 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1563 transitions. Word has length 144 [2019-10-13 18:02:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:26,817 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1563 transitions. [2019-10-13 18:02:26,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1563 transitions. [2019-10-13 18:02:26,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 18:02:26,823 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:26,823 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:27,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:27,029 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash -356380674, now seen corresponding path program 1 times [2019-10-13 18:02:27,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:27,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762117630] [2019-10-13 18:02:27,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:27,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:27,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:27,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762117630] [2019-10-13 18:02:27,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572105761] [2019-10-13 18:02:27,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:27,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:27,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:27,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:27,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:27,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420896459] [2019-10-13 18:02:27,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:27,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:27,497 INFO L87 Difference]: Start difference. First operand 1112 states and 1563 transitions. Second operand 3 states. [2019-10-13 18:02:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:28,370 INFO L93 Difference]: Finished difference Result 1666 states and 2397 transitions. [2019-10-13 18:02:28,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:28,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-10-13 18:02:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:28,386 INFO L225 Difference]: With dead ends: 1666 [2019-10-13 18:02:28,386 INFO L226 Difference]: Without dead ends: 1664 [2019-10-13 18:02:28,387 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-13 18:02:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1298. [2019-10-13 18:02:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2019-10-13 18:02:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1875 transitions. [2019-10-13 18:02:28,455 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1875 transitions. Word has length 162 [2019-10-13 18:02:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:28,457 INFO L462 AbstractCegarLoop]: Abstraction has 1298 states and 1875 transitions. [2019-10-13 18:02:28,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:28,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1875 transitions. [2019-10-13 18:02:28,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-13 18:02:28,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:28,464 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:28,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:28,676 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:28,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1544408570, now seen corresponding path program 1 times [2019-10-13 18:02:28,678 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:28,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664557621] [2019-10-13 18:02:28,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:29,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664557621] [2019-10-13 18:02:29,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396549114] [2019-10-13 18:02:29,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:29,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:29,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:29,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 18:02:29,273 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:29,273 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-13 18:02:29,273 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850742646] [2019-10-13 18:02:29,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:29,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:29,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:29,275 INFO L87 Difference]: Start difference. First operand 1298 states and 1875 transitions. Second operand 5 states. [2019-10-13 18:02:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:30,624 INFO L93 Difference]: Finished difference Result 2984 states and 4267 transitions. [2019-10-13 18:02:30,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:30,625 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2019-10-13 18:02:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:30,637 INFO L225 Difference]: With dead ends: 2984 [2019-10-13 18:02:30,637 INFO L226 Difference]: Without dead ends: 1692 [2019-10-13 18:02:30,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:02:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2019-10-13 18:02:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1686. [2019-10-13 18:02:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1686 states. [2019-10-13 18:02:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 2342 transitions. [2019-10-13 18:02:30,712 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 2342 transitions. Word has length 217 [2019-10-13 18:02:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:30,712 INFO L462 AbstractCegarLoop]: Abstraction has 1686 states and 2342 transitions. [2019-10-13 18:02:30,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 2342 transitions. [2019-10-13 18:02:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-10-13 18:02:30,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:30,719 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:30,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,924 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1655155903, now seen corresponding path program 1 times [2019-10-13 18:02:30,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:30,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536293955] [2019-10-13 18:02:30,925 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:02:31,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536293955] [2019-10-13 18:02:31,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155127180] [2019-10-13 18:02:31,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:31,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:31,504 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:31,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:02:31,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994907298] [2019-10-13 18:02:31,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:31,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:31,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:31,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:31,506 INFO L87 Difference]: Start difference. First operand 1686 states and 2342 transitions. Second operand 11 states. [2019-10-13 18:02:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:33,637 INFO L93 Difference]: Finished difference Result 4198 states and 6480 transitions. [2019-10-13 18:02:33,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:02:33,645 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 244 [2019-10-13 18:02:33,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:33,664 INFO L225 Difference]: With dead ends: 4198 [2019-10-13 18:02:33,664 INFO L226 Difference]: Without dead ends: 2700 [2019-10-13 18:02:33,669 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2019-10-13 18:02:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2634. [2019-10-13 18:02:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2634 states. [2019-10-13 18:02:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3652 transitions. [2019-10-13 18:02:33,761 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3652 transitions. Word has length 244 [2019-10-13 18:02:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:33,761 INFO L462 AbstractCegarLoop]: Abstraction has 2634 states and 3652 transitions. [2019-10-13 18:02:33,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3652 transitions. [2019-10-13 18:02:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-10-13 18:02:33,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:33,768 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:33,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:33,973 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash 365148164, now seen corresponding path program 1 times [2019-10-13 18:02:33,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:33,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092497844] [2019-10-13 18:02:33,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:33,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:33,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 152 proven. 72 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 18:02:34,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092497844] [2019-10-13 18:02:34,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239498258] [2019-10-13 18:02:34,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:34,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 269 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 18:02:34,553 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:34,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:02:34,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370803579] [2019-10-13 18:02:34,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:34,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:34,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:34,556 INFO L87 Difference]: Start difference. First operand 2634 states and 3652 transitions. Second operand 11 states. [2019-10-13 18:02:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:38,410 INFO L93 Difference]: Finished difference Result 6754 states and 10443 transitions. [2019-10-13 18:02:38,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 18:02:38,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 290 [2019-10-13 18:02:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:38,441 INFO L225 Difference]: With dead ends: 6754 [2019-10-13 18:02:38,441 INFO L226 Difference]: Without dead ends: 4310 [2019-10-13 18:02:38,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-10-13 18:02:38,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-10-13 18:02:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4270. [2019-10-13 18:02:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4270 states. [2019-10-13 18:02:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4270 states to 4270 states and 6149 transitions. [2019-10-13 18:02:38,649 INFO L78 Accepts]: Start accepts. Automaton has 4270 states and 6149 transitions. Word has length 290 [2019-10-13 18:02:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:38,650 INFO L462 AbstractCegarLoop]: Abstraction has 4270 states and 6149 transitions. [2019-10-13 18:02:38,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4270 states and 6149 transitions. [2019-10-13 18:02:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-13 18:02:38,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:38,657 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:38,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:38,869 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:38,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2083335041, now seen corresponding path program 1 times [2019-10-13 18:02:38,870 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:38,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113159810] [2019-10-13 18:02:38,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:38,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:38,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 85 proven. 213 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:39,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113159810] [2019-10-13 18:02:39,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473358693] [2019-10-13 18:02:39,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:40,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:40,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 226 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-13 18:02:40,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:40,294 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:40,294 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959710796] [2019-10-13 18:02:40,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:40,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:40,297 INFO L87 Difference]: Start difference. First operand 4270 states and 6149 transitions. Second operand 16 states. [2019-10-13 18:02:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:44,567 INFO L93 Difference]: Finished difference Result 8866 states and 12850 transitions. [2019-10-13 18:02:44,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 18:02:44,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 301 [2019-10-13 18:02:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:44,593 INFO L225 Difference]: With dead ends: 8866 [2019-10-13 18:02:44,593 INFO L226 Difference]: Without dead ends: 4727 [2019-10-13 18:02:44,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 18:02:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2019-10-13 18:02:44,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4654. [2019-10-13 18:02:44,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4654 states. [2019-10-13 18:02:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 6201 transitions. [2019-10-13 18:02:44,749 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 6201 transitions. Word has length 301 [2019-10-13 18:02:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:44,750 INFO L462 AbstractCegarLoop]: Abstraction has 4654 states and 6201 transitions. [2019-10-13 18:02:44,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:02:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 6201 transitions. [2019-10-13 18:02:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-10-13 18:02:44,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:44,759 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:44,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:44,971 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:44,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1877035878, now seen corresponding path program 1 times [2019-10-13 18:02:44,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:44,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674212024] [2019-10-13 18:02:44,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:44,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:44,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 18:02:45,418 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674212024] [2019-10-13 18:02:45,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210850451] [2019-10-13 18:02:45,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:45,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:02:45,822 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:45,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:02:45,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340316577] [2019-10-13 18:02:45,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:45,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:45,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:45,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:02:45,829 INFO L87 Difference]: Start difference. First operand 4654 states and 6201 transitions. Second operand 3 states. [2019-10-13 18:02:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:46,501 INFO L93 Difference]: Finished difference Result 5964 states and 7915 transitions. [2019-10-13 18:02:46,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:46,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 424 [2019-10-13 18:02:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:46,533 INFO L225 Difference]: With dead ends: 5964 [2019-10-13 18:02:46,534 INFO L226 Difference]: Without dead ends: 5962 [2019-10-13 18:02:46,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:02:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2019-10-13 18:02:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 5394. [2019-10-13 18:02:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5394 states. [2019-10-13 18:02:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5394 states to 5394 states and 7149 transitions. [2019-10-13 18:02:46,741 INFO L78 Accepts]: Start accepts. Automaton has 5394 states and 7149 transitions. Word has length 424 [2019-10-13 18:02:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:46,743 INFO L462 AbstractCegarLoop]: Abstraction has 5394 states and 7149 transitions. [2019-10-13 18:02:46,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:46,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5394 states and 7149 transitions. [2019-10-13 18:02:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2019-10-13 18:02:46,767 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:46,768 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:46,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:46,972 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1392150877, now seen corresponding path program 1 times [2019-10-13 18:02:46,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:46,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828105946] [2019-10-13 18:02:46,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:46,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 313 proven. 328 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 18:02:48,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828105946] [2019-10-13 18:02:48,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724680305] [2019-10-13 18:02:48,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:48,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 18:02:48,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:48,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:48,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:49,385 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 34 [2019-10-13 18:02:49,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 5 terms [2019-10-13 18:02:49,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-10-13 18:02:49,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-10-13 18:02:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 513 proven. 2 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-10-13 18:02:49,894 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:49,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2019-10-13 18:02:49,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695254002] [2019-10-13 18:02:49,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 18:02:49,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 18:02:49,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2019-10-13 18:02:49,897 INFO L87 Difference]: Start difference. First operand 5394 states and 7149 transitions. Second operand 25 states. [2019-10-13 18:02:51,598 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2019-10-13 18:02:51,743 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 75 [2019-10-13 18:02:52,850 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65