/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/array-examples/standard_init4_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:43:51,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:43:51,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:43:51,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:43:51,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:43:51,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:43:51,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:43:51,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:43:51,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:43:51,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:43:51,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:43:51,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:43:51,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:43:51,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:43:51,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:43:51,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:43:51,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:43:51,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:43:51,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:43:51,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:43:51,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:43:51,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:43:51,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:43:51,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:43:51,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:43:51,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:43:51,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:43:51,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:43:51,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:43:51,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:43:51,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:43:51,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:43:51,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:43:51,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:43:51,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:43:51,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:43:51,814 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 18:43:51,833 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:43:51,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:43:51,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:43:51,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:43:51,836 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:43:51,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:43:51,836 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:43:51,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:43:51,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:43:51,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:43:51,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:43:51,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:43:51,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:43:51,837 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:43:51,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:43:51,838 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:43:51,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:43:51,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:43:51,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:43:51,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:43:51,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:43:51,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:43:51,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:43:51,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:43:51,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:43:51,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:43:51,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:43:51,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:43:51,840 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:43:52,113 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:43:52,129 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:43:52,133 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:43:52,135 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:43:52,135 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:43:52,136 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-11-06 18:43:52,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5b707b0/ae6aef7caf2e43bdb339b2ed9bbba175/FLAG66a0bcfc2 [2019-11-06 18:43:52,703 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:43:52,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-1.i [2019-11-06 18:43:52,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5b707b0/ae6aef7caf2e43bdb339b2ed9bbba175/FLAG66a0bcfc2 [2019-11-06 18:43:53,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc5b707b0/ae6aef7caf2e43bdb339b2ed9bbba175 [2019-11-06 18:43:53,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:43:53,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:43:53,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:43:53,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:43:53,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:43:53,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d34e1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53, skipping insertion in model container [2019-11-06 18:43:53,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,076 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:43:53,094 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:43:53,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:43:53,303 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:43:53,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:43:53,343 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:43:53,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53 WrapperNode [2019-11-06 18:43:53,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:43:53,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:43:53,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:43:53,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:43:53,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (1/1) ... [2019-11-06 18:43:53,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:43:53,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:43:53,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:43:53,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:43:53,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (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 18:43:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:43:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:43:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:43:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:43:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:43:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:43:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:43:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:43:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:43:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:43:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:43:53,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:43:53,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:43:53,793 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:43:53,793 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 18:43:53,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:43:53 BoogieIcfgContainer [2019-11-06 18:43:53,795 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:43:53,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:43:53,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:43:53,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:43:53,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:43:53" (1/3) ... [2019-11-06 18:43:53,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec981cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:43:53, skipping insertion in model container [2019-11-06 18:43:53,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:53" (2/3) ... [2019-11-06 18:43:53,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec981cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:43:53, skipping insertion in model container [2019-11-06 18:43:53,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:43:53" (3/3) ... [2019-11-06 18:43:53,804 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-1.i [2019-11-06 18:43:53,817 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:43:53,826 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:43:53,847 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:43:53,892 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:43:53,893 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:43:53,893 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:43:53,893 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:43:53,893 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:43:53,893 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:43:53,893 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:43:53,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:43:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-06 18:43:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:43:53,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:53,912 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:53,914 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614638, now seen corresponding path program 1 times [2019-11-06 18:43:53,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:53,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629232183] [2019-11-06 18:43:53,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,088 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 18:43:54,089 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629232183] [2019-11-06 18:43:54,089 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:43:54,090 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:43:54,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444545405] [2019-11-06 18:43:54,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:43:54,094 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:54,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:43:54,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:43:54,107 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-06 18:43:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:54,234 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2019-11-06 18:43:54,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:43:54,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-06 18:43:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:54,243 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:43:54,243 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:43:54,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:43:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:43:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 18:43:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:43:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-06 18:43:54,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2019-11-06 18:43:54,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:54,280 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-06 18:43:54,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:43:54,280 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-06 18:43:54,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:43:54,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:54,282 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:54,282 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash -395002610, now seen corresponding path program 1 times [2019-11-06 18:43:54,283 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:54,283 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975717627] [2019-11-06 18:43:54,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,367 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 18:43:54,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975717627] [2019-11-06 18:43:54,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:43:54,368 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:43:54,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956582881] [2019-11-06 18:43:54,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:43:54,371 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:54,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:43:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:43:54,372 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-11-06 18:43:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:54,483 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-11-06 18:43:54,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:43:54,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-06 18:43:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:54,486 INFO L225 Difference]: With dead ends: 45 [2019-11-06 18:43:54,486 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:43:54,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:43:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:43:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 18:43:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:43:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:43:54,496 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-11-06 18:43:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:54,496 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:43:54,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:43:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:43:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:43:54,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:54,498 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] [2019-11-06 18:43:54,498 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash 47445068, now seen corresponding path program 1 times [2019-11-06 18:43:54,499 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:54,499 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517320479] [2019-11-06 18:43:54,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:43:54,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517320479] [2019-11-06 18:43:54,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655204462] [2019-11-06 18:43:54,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:43:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:43:54,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:43:54,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:54,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:43:54,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643814537] [2019-11-06 18:43:54,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:43:54,718 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:43:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:54,719 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2019-11-06 18:43:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:54,843 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-11-06 18:43:54,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:43:54,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-06 18:43:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:54,845 INFO L225 Difference]: With dead ends: 52 [2019-11-06 18:43:54,845 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:43:54,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:54,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:43:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 18:43:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:43:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-06 18:43:54,864 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2019-11-06 18:43:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:54,865 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-06 18:43:54,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:43:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-06 18:43:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:43:54,867 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:54,867 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:55,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:55,073 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1810840398, now seen corresponding path program 2 times [2019-11-06 18:43:55,075 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:55,075 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604319780] [2019-11-06 18:43:55,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:43:55,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604319780] [2019-11-06 18:43:55,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159618085] [2019-11-06 18:43:55,206 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 18:43:55,264 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:55,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:55,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:43:55,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:43:55,289 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:55,289 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:43:55,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100589274] [2019-11-06 18:43:55,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:43:55,291 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:43:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:55,292 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2019-11-06 18:43:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:55,413 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-11-06 18:43:55,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:43:55,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-06 18:43:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:55,414 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:43:55,414 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:43:55,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:43:55,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-06 18:43:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:43:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-06 18:43:55,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2019-11-06 18:43:55,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:55,423 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-06 18:43:55,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:43:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-06 18:43:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:43:55,424 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:55,424 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:55,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:55,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:55,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1527698548, now seen corresponding path program 3 times [2019-11-06 18:43:55,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:55,631 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041506393] [2019-11-06 18:43:55,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:43:55,799 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041506393] [2019-11-06 18:43:55,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086534678] [2019-11-06 18:43:55,800 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 18:43:55,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:43:55,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:55,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:43:55,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:43:55,891 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:55,891 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:43:55,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948272604] [2019-11-06 18:43:55,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:43:55,893 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:43:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:55,894 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2019-11-06 18:43:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:55,999 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2019-11-06 18:43:55,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:43:56,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-11-06 18:43:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:56,001 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:43:56,001 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:43:56,002 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:43:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:43:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:43:56,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-11-06 18:43:56,009 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2019-11-06 18:43:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:56,009 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-11-06 18:43:56,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:43:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-11-06 18:43:56,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:43:56,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:56,011 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:56,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:56,212 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1451349618, now seen corresponding path program 4 times [2019-11-06 18:43:56,212 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:56,213 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409208964] [2019-11-06 18:43:56,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:43:56,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409208964] [2019-11-06 18:43:56,320 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017823265] [2019-11-06 18:43:56,320 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 18:43:56,376 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:56,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:56,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:43:56,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-06 18:43:56,398 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:56,399 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:43:56,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893105759] [2019-11-06 18:43:56,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:43:56,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:56,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:43:56,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:56,400 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 9 states. [2019-11-06 18:43:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:56,544 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2019-11-06 18:43:56,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:43:56,544 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-11-06 18:43:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:56,545 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:43:56,546 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:43:56,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:43:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 18:43:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:43:56,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-06 18:43:56,558 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2019-11-06 18:43:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:56,560 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-06 18:43:56,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:43:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-06 18:43:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:43:56,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:56,561 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:56,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:56,767 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:56,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2058629836, now seen corresponding path program 5 times [2019-11-06 18:43:56,768 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:56,768 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005682325] [2019-11-06 18:43:56,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 18:43:56,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005682325] [2019-11-06 18:43:56,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779131090] [2019-11-06 18:43:56,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 18:43:57,197 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:43:57,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:57,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:43:57,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 18:43:57,228 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:57,228 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:43:57,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311904110] [2019-11-06 18:43:57,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:43:57,229 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:43:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:57,230 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 10 states. [2019-11-06 18:43:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:57,360 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2019-11-06 18:43:57,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:43:57,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-11-06 18:43:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:57,362 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:43:57,362 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:43:57,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:43:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-06 18:43:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:43:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-11-06 18:43:57,369 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2019-11-06 18:43:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:57,370 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-11-06 18:43:57,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:43:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-11-06 18:43:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:43:57,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:57,371 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:57,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:57,585 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1129940942, now seen corresponding path program 6 times [2019-11-06 18:43:57,585 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:57,586 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137808349] [2019-11-06 18:43:57,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 18:43:57,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137808349] [2019-11-06 18:43:57,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130823950] [2019-11-06 18:43:57,715 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:43:57,958 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:43:57,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:57,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:43:57,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-06 18:43:57,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:57,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:43:57,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173809220] [2019-11-06 18:43:57,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:43:57,980 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:57,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:43:57,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:57,981 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2019-11-06 18:43:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:58,129 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2019-11-06 18:43:58,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:43:58,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2019-11-06 18:43:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:58,131 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:43:58,131 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:43:58,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:58,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:43:58,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 18:43:58,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:43:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-11-06 18:43:58,138 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2019-11-06 18:43:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:58,139 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-11-06 18:43:58,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:43:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-11-06 18:43:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:43:58,140 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:58,140 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:58,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:58,346 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:58,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2092627444, now seen corresponding path program 7 times [2019-11-06 18:43:58,347 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:58,347 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676849469] [2019-11-06 18:43:58,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-06 18:43:58,493 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676849469] [2019-11-06 18:43:58,493 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035082773] [2019-11-06 18:43:58,493 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-11-06 18:43:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:58,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:43:58,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-06 18:43:58,574 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:58,574 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:43:58,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46552536] [2019-11-06 18:43:58,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:43:58,575 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:43:58,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:58,576 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 12 states. [2019-11-06 18:43:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:58,717 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-11-06 18:43:58,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:43:58,717 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-11-06 18:43:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:58,718 INFO L225 Difference]: With dead ends: 94 [2019-11-06 18:43:58,718 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:43:58,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:43:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-06 18:43:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:43:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-11-06 18:43:58,726 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2019-11-06 18:43:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:58,727 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-11-06 18:43:58,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:43:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-11-06 18:43:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:43:58,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:58,728 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:58,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:58,938 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:58,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2092520974, now seen corresponding path program 8 times [2019-11-06 18:43:58,939 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:58,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892304064] [2019-11-06 18:43:58,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 18:43:59,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892304064] [2019-11-06 18:43:59,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864720421] [2019-11-06 18:43:59,075 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:43:59,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:59,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:59,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:43:59,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-06 18:43:59,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:59,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:43:59,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260469501] [2019-11-06 18:43:59,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:43:59,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:43:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:59,158 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 13 states. [2019-11-06 18:43:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:59,303 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2019-11-06 18:43:59,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:43:59,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-06 18:43:59,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:59,304 INFO L225 Difference]: With dead ends: 101 [2019-11-06 18:43:59,304 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:43:59,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:43:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-06 18:43:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 18:43:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-11-06 18:43:59,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2019-11-06 18:43:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:59,320 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-11-06 18:43:59,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:43:59,320 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-11-06 18:43:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:43:59,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:59,321 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:59,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:59,525 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:59,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:59,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1825288524, now seen corresponding path program 9 times [2019-11-06 18:43:59,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:59,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344134991] [2019-11-06 18:43:59,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-06 18:43:59,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344134991] [2019-11-06 18:43:59,671 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871156866] [2019-11-06 18:43:59,672 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:02,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:44:02,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:02,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:44:02,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-06 18:44:02,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:02,663 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:44:02,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89225456] [2019-11-06 18:44:02,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:44:02,664 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:02,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:44:02,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:44:02,664 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 14 states. [2019-11-06 18:44:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:02,789 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-11-06 18:44:02,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:44:02,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2019-11-06 18:44:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:02,790 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:44:02,791 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:44:02,792 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:44:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:44:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-06 18:44:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:44:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-06 18:44:02,799 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2019-11-06 18:44:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:02,800 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-06 18:44:02,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:44:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-06 18:44:02,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:44:02,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:02,801 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:03,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:03,011 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1177185202, now seen corresponding path program 10 times [2019-11-06 18:44:03,012 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:03,012 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549354979] [2019-11-06 18:44:03,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:03,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-06 18:44:03,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549354979] [2019-11-06 18:44:03,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784329541] [2019-11-06 18:44:03,210 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:03,304 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:03,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:03,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:44:03,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-06 18:44:03,355 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:03,355 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:44:03,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236674217] [2019-11-06 18:44:03,357 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:44:03,359 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:03,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:44:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:03,359 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2019-11-06 18:44:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:03,622 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2019-11-06 18:44:03,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:44:03,623 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2019-11-06 18:44:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:03,623 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:44:03,624 INFO L226 Difference]: Without dead ends: 68 [2019-11-06 18:44:03,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:44:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-06 18:44:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-06 18:44:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-06 18:44:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-11-06 18:44:03,631 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2019-11-06 18:44:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:03,631 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-11-06 18:44:03,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:44:03,632 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-11-06 18:44:03,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:44:03,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:03,633 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:03,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:03,837 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash 342894732, now seen corresponding path program 11 times [2019-11-06 18:44:03,838 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:03,838 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258083090] [2019-11-06 18:44:03,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:04,000 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-06 18:44:04,001 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258083090] [2019-11-06 18:44:04,001 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802053695] [2019-11-06 18:44:04,001 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:12,188 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:44:12,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:12,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:44:12,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-06 18:44:12,220 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:12,221 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:44:12,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034316006] [2019-11-06 18:44:12,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:44:12,221 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:12,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:44:12,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:44:12,222 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 16 states. [2019-11-06 18:44:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:12,396 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2019-11-06 18:44:12,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:44:12,396 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-11-06 18:44:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:12,397 INFO L225 Difference]: With dead ends: 122 [2019-11-06 18:44:12,397 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:44:12,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:44:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:44:12,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-11-06 18:44:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:44:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-06 18:44:12,405 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2019-11-06 18:44:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:12,405 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-06 18:44:12,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:44:12,405 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-06 18:44:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:44:12,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:12,407 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:12,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:12,621 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:12,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1686898, now seen corresponding path program 12 times [2019-11-06 18:44:12,622 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:12,622 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356069057] [2019-11-06 18:44:12,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-11-06 18:44:12,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356069057] [2019-11-06 18:44:12,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637964968] [2019-11-06 18:44:12,847 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:29,014 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:44:29,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:29,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:44:29,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 78 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:44:29,121 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:29,122 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-11-06 18:44:29,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170345878] [2019-11-06 18:44:29,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:44:29,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:44:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:29,124 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 18 states. [2019-11-06 18:44:29,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:29,326 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2019-11-06 18:44:29,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:44:29,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2019-11-06 18:44:29,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:29,327 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:44:29,327 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 18:44:29,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:29,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 18:44:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-06 18:44:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-06 18:44:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-11-06 18:44:29,342 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2019-11-06 18:44:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:29,345 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-11-06 18:44:29,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:44:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-11-06 18:44:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:44:29,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:29,346 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:29,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:29,558 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash 106590156, now seen corresponding path program 13 times [2019-11-06 18:44:29,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:29,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408788037] [2019-11-06 18:44:29,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-11-06 18:44:29,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408788037] [2019-11-06 18:44:29,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622198310] [2019-11-06 18:44:29,805 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:29,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:44:29,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-11-06 18:44:29,906 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:29,906 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:44:29,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183933179] [2019-11-06 18:44:29,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:44:29,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:44:29,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:29,909 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 18 states. [2019-11-06 18:44:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:30,094 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2019-11-06 18:44:30,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:44:30,095 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2019-11-06 18:44:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:30,096 INFO L225 Difference]: With dead ends: 136 [2019-11-06 18:44:30,096 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:44:30,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:44:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:44:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-06 18:44:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-06 18:44:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-06 18:44:30,112 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-06 18:44:30,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:30,113 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-06 18:44:30,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:44:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-06 18:44:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-06 18:44:30,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:30,114 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:30,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:30,319 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1965252814, now seen corresponding path program 14 times [2019-11-06 18:44:30,320 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:30,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663294980] [2019-11-06 18:44:30,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-11-06 18:44:30,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663294980] [2019-11-06 18:44:30,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727968008] [2019-11-06 18:44:30,512 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:30,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:30,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:30,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:44:30,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-11-06 18:44:30,603 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:30,603 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:44:30,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418905094] [2019-11-06 18:44:30,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:44:30,604 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:30,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:44:30,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:44:30,604 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 19 states. [2019-11-06 18:44:30,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:30,843 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2019-11-06 18:44:30,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:44:30,844 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-11-06 18:44:30,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:30,844 INFO L225 Difference]: With dead ends: 143 [2019-11-06 18:44:30,844 INFO L226 Difference]: Without dead ends: 84 [2019-11-06 18:44:30,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:44:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-06 18:44:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-11-06 18:44:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-06 18:44:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-06 18:44:30,852 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2019-11-06 18:44:30,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:30,852 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-06 18:44:30,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:44:30,852 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-06 18:44:30,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-06 18:44:30,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:30,853 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:31,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:31,058 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash -38631668, now seen corresponding path program 15 times [2019-11-06 18:44:31,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:31,058 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206225618] [2019-11-06 18:44:31,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-11-06 18:44:31,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206225618] [2019-11-06 18:44:31,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416796265] [2019-11-06 18:44:31,279 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true