/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:19:36,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:19:36,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:19:36,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:19:36,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:19:36,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:19:36,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:19:36,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:19:36,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:19:36,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:19:36,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:19:36,815 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:19:36,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:19:36,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:19:36,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:19:36,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:19:36,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:19:36,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:19:36,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:19:36,833 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:19:36,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:19:36,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:19:36,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:19:36,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:19:36,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:19:36,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:19:36,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:19:36,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:19:36,862 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 [2019-11-06 19:19:36,882 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:19:36,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:19:36,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:19:36,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:19:36,884 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:19:36,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:19:36,885 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:19:36,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:19:36,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:19:36,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:19:36,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:19:36,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:19:36,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:19:36,887 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:19:36,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:19:36,887 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:19:36,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:19:36,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:19:36,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:19:36,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:19:36,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:19:36,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:19:36,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:19:36,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:19:36,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:19:36,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:19:36,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:19:36,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:19:36,890 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:19:37,157 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:19:37,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:19:37,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:19:37,182 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:19:37,183 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:19:37,184 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-11-06 19:19:37,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60a67033/0d33f4f49c4448388e6de449d4416db0/FLAG4c7f41c11 [2019-11-06 19:19:37,926 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:19:37,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-11-06 19:19:37,947 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60a67033/0d33f4f49c4448388e6de449d4416db0/FLAG4c7f41c11 [2019-11-06 19:19:38,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b60a67033/0d33f4f49c4448388e6de449d4416db0 [2019-11-06 19:19:38,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:19:38,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:19:38,115 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:38,115 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:19:38,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:19:38,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:38" (1/1) ... [2019-11-06 19:19:38,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e145172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:38, skipping insertion in model container [2019-11-06 19:19:38,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:19:38" (1/1) ... [2019-11-06 19:19:38,130 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:19:38,212 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:19:39,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:39,160 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:19:39,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:19:39,607 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:19:39,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39 WrapperNode [2019-11-06 19:19:39,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:19:39,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:19:39,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:19:39,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:19:39,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (1/1) ... [2019-11-06 19:19:39,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (1/1) ... [2019-11-06 19:19:39,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (1/1) ... [2019-11-06 19:19:39,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (1/1) ... [2019-11-06 19:19:39,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (1/1) ... [2019-11-06 19:19:39,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (1/1) ... [2019-11-06 19:19:39,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (1/1) ... [2019-11-06 19:19:39,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:19:39,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:19:39,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:19:39,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:19:39,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (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 [2019-11-06 19:19:39,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:19:39,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:19:39,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:19:39,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:19:39,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:19:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:19:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:19:39,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:19:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:19:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:19:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:19:39,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:19:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:19:42,207 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:19:42,208 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:19:42,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:42 BoogieIcfgContainer [2019-11-06 19:19:42,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:19:42,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:19:42,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:19:42,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:19:42,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:19:38" (1/3) ... [2019-11-06 19:19:42,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d33a9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:42, skipping insertion in model container [2019-11-06 19:19:42,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:19:39" (2/3) ... [2019-11-06 19:19:42,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d33a9dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:19:42, skipping insertion in model container [2019-11-06 19:19:42,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:19:42" (3/3) ... [2019-11-06 19:19:42,217 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2019-11-06 19:19:42,227 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:19:42,236 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:19:42,248 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:19:42,277 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:19:42,277 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:19:42,277 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:19:42,277 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:19:42,277 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:19:42,278 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:19:42,278 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:19:42,278 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:19:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:19:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 19:19:42,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:42,315 INFO L410 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] [2019-11-06 19:19:42,317 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash 10915389, now seen corresponding path program 1 times [2019-11-06 19:19:42,332 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:42,332 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790053551] [2019-11-06 19:19:42,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:19:42,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790053551] [2019-11-06 19:19:42,744 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:19:42,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:19:42,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776280309] [2019-11-06 19:19:42,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:42,754 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:42,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:42,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:19:42,776 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:19:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:48,138 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:19:48,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:19:48,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-11-06 19:19:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:48,177 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:19:48,178 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:19:48,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:19:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:19:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:19:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:19:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-11-06 19:19:48,329 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 46 [2019-11-06 19:19:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:48,331 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-11-06 19:19:48,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-11-06 19:19:48,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-06 19:19:48,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:48,348 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:48,348 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 626309048, now seen corresponding path program 1 times [2019-11-06 19:19:48,349 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:48,349 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095344834] [2019-11-06 19:19:48,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 78 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:48,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095344834] [2019-11-06 19:19:48,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018052329] [2019-11-06 19:19:48,785 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 [2019-11-06 19:19:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:48,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:48,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 19:19:49,039 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:49,040 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:19:49,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120483185] [2019-11-06 19:19:49,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:49,046 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:49,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:49,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:19:49,047 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-11-06 19:19:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:52,849 INFO L93 Difference]: Finished difference Result 3131 states and 5147 transitions. [2019-11-06 19:19:52,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:52,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2019-11-06 19:19:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:52,870 INFO L225 Difference]: With dead ends: 3131 [2019-11-06 19:19:52,870 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 19:19:52,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:19:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 19:19:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078. [2019-11-06 19:19:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-11-06 19:19:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3239 transitions. [2019-11-06 19:19:52,967 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3239 transitions. Word has length 213 [2019-11-06 19:19:52,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:52,968 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3239 transitions. [2019-11-06 19:19:52,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:52,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3239 transitions. [2019-11-06 19:19:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-06 19:19:52,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:52,973 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:19:53,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:53,180 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash 537819504, now seen corresponding path program 1 times [2019-11-06 19:19:53,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:53,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348191715] [2019-11-06 19:19:53,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 78 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:19:53,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348191715] [2019-11-06 19:19:53,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722279381] [2019-11-06 19:19:53,488 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 [2019-11-06 19:19:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:53,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:19:53,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 19:19:53,710 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:19:53,711 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:19:53,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115656035] [2019-11-06 19:19:53,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:19:53,713 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:53,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:19:53,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:53,714 INFO L87 Difference]: Start difference. First operand 2078 states and 3239 transitions. Second operand 5 states. [2019-11-06 19:19:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:19:56,535 INFO L93 Difference]: Finished difference Result 6302 states and 10079 transitions. [2019-11-06 19:19:56,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:19:56,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2019-11-06 19:19:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:19:56,562 INFO L225 Difference]: With dead ends: 6302 [2019-11-06 19:19:56,562 INFO L226 Difference]: Without dead ends: 4230 [2019-11-06 19:19:56,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:19:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-11-06 19:19:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-11-06 19:19:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-11-06 19:19:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5867 transitions. [2019-11-06 19:19:56,732 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5867 transitions. Word has length 217 [2019-11-06 19:19:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:19:56,734 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5867 transitions. [2019-11-06 19:19:56,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:19:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5867 transitions. [2019-11-06 19:19:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-11-06 19:19:56,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:19:56,744 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:19:56,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:19:56,948 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:19:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:19:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1755403504, now seen corresponding path program 1 times [2019-11-06 19:19:56,950 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:19:56,950 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558512427] [2019-11-06 19:19:56,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:19:56,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 198 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-11-06 19:19:57,410 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558512427] [2019-11-06 19:19:57,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339626965] [2019-11-06 19:19:57,411 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 [2019-11-06 19:19:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:19:57,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:19:57,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:19:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 19:19:57,842 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:19:57,842 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:19:57,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720416459] [2019-11-06 19:19:57,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:19:57,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:19:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:19:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:19:57,845 INFO L87 Difference]: Start difference. First operand 4208 states and 5867 transitions. Second operand 11 states. [2019-11-06 19:20:02,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:02,986 INFO L93 Difference]: Finished difference Result 10864 states and 15765 transitions. [2019-11-06 19:20:02,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:20:02,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 336 [2019-11-06 19:20:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:03,018 INFO L225 Difference]: With dead ends: 10864 [2019-11-06 19:20:03,018 INFO L226 Difference]: Without dead ends: 6662 [2019-11-06 19:20:03,029 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 343 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:20:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-11-06 19:20:03,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4591. [2019-11-06 19:20:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4591 states. [2019-11-06 19:20:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6444 transitions. [2019-11-06 19:20:03,174 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 6444 transitions. Word has length 336 [2019-11-06 19:20:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:03,175 INFO L462 AbstractCegarLoop]: Abstraction has 4591 states and 6444 transitions. [2019-11-06 19:20:03,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:20:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 6444 transitions. [2019-11-06 19:20:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2019-11-06 19:20:03,185 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:03,185 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:20:03,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:03,389 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:03,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1593066728, now seen corresponding path program 1 times [2019-11-06 19:20:03,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:03,390 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056080459] [2019-11-06 19:20:03,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 117 proven. 221 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-06 19:20:04,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056080459] [2019-11-06 19:20:04,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283372528] [2019-11-06 19:20:04,003 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 [2019-11-06 19:20:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:04,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:20:04,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-06 19:20:04,369 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:20:04,370 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:20:04,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086017273] [2019-11-06 19:20:04,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:04,371 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:04,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:20:04,372 INFO L87 Difference]: Start difference. First operand 4591 states and 6444 transitions. Second operand 5 states. [2019-11-06 19:20:06,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:06,904 INFO L93 Difference]: Finished difference Result 10581 states and 14860 transitions. [2019-11-06 19:20:06,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:20:06,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 412 [2019-11-06 19:20:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:06,930 INFO L225 Difference]: With dead ends: 10581 [2019-11-06 19:20:06,930 INFO L226 Difference]: Without dead ends: 5996 [2019-11-06 19:20:06,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:20:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2019-11-06 19:20:07,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5968. [2019-11-06 19:20:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5968 states. [2019-11-06 19:20:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7680 transitions. [2019-11-06 19:20:07,094 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 7680 transitions. Word has length 412 [2019-11-06 19:20:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:07,094 INFO L462 AbstractCegarLoop]: Abstraction has 5968 states and 7680 transitions. [2019-11-06 19:20:07,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:07,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 7680 transitions. [2019-11-06 19:20:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2019-11-06 19:20:07,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:07,115 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:20:07,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:20:07,327 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash -330925460, now seen corresponding path program 1 times [2019-11-06 19:20:07,328 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:07,328 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838027938] [2019-11-06 19:20:07,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 233 proven. 114 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-06 19:20:08,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838027938] [2019-11-06 19:20:08,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208430387] [2019-11-06 19:20:08,240 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 [2019-11-06 19:20:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:08,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:08,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 421 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 19:20:08,638 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:20:08,638 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:20:08,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978928454] [2019-11-06 19:20:08,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:20:08,640 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:20:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:20:08,640 INFO L87 Difference]: Start difference. First operand 5968 states and 7680 transitions. Second operand 11 states.