/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_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:42:23,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:42:23,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:42:23,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:42:23,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:42:23,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:42:23,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:42:23,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:42:23,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:42:23,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:42:23,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:42:23,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:42:23,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:42:23,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:42:23,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:42:23,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:42:23,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:42:23,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:42:23,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:42:23,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:42:23,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:42:23,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:42:23,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:42:23,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:42:23,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:42:23,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:42:23,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:42:23,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:42:23,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:42:23,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:42:23,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:42:23,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:42:23,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:42:23,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:42:23,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:42:23,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:42:23,539 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 18:42:23,574 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:42:23,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:42:23,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:42:23,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:42:23,579 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:42:23,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:42:23,579 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:42:23,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:42:23,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:42:23,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:42:23,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:42:23,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:42:23,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:42:23,581 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:42:23,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:42:23,581 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:42:23,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:42:23,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:42:23,582 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:42:23,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:42:23,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:42:23,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:23,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:42:23,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:42:23,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:42:23,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:42:23,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:42:23,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:42:23,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:42:23,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:42:23,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:42:23,881 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:42:23,883 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:42:23,883 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:42:23,884 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-11-06 18:42:23,961 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f394abce/0f05c3c84ceb4471868d084ecebb5472/FLAG5ead022aa [2019-11-06 18:42:24,387 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:42:24,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-11-06 18:42:24,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f394abce/0f05c3c84ceb4471868d084ecebb5472/FLAG5ead022aa [2019-11-06 18:42:24,797 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f394abce/0f05c3c84ceb4471868d084ecebb5472 [2019-11-06 18:42:24,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:42:24,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:42:24,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:24,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:42:24,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:42:24,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:24" (1/1) ... [2019-11-06 18:42:24,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6968dd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:24, skipping insertion in model container [2019-11-06 18:42:24,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:24" (1/1) ... [2019-11-06 18:42:24,824 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:42:24,852 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:42:25,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:25,024 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:42:25,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:25,074 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:42:25,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25 WrapperNode [2019-11-06 18:42:25,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:25,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:42:25,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:42:25,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:42:25,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (1/1) ... [2019-11-06 18:42:25,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (1/1) ... [2019-11-06 18:42:25,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (1/1) ... [2019-11-06 18:42:25,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (1/1) ... [2019-11-06 18:42:25,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (1/1) ... [2019-11-06 18:42:25,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (1/1) ... [2019-11-06 18:42:25,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (1/1) ... [2019-11-06 18:42:25,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:42:25,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:42:25,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:42:25,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:42:25,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (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 18:42:25,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:42:25,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:42:25,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:42:25,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:42:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:42:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:42:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:42:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:42:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:42:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:42:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:42:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:42:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:42:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:42:25,784 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:42:25,785 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-06 18:42:25,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:25 BoogieIcfgContainer [2019-11-06 18:42:25,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:42:25,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:42:25,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:42:25,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:42:25,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:42:24" (1/3) ... [2019-11-06 18:42:25,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42161b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:25, skipping insertion in model container [2019-11-06 18:42:25,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:25" (2/3) ... [2019-11-06 18:42:25,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42161b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:25, skipping insertion in model container [2019-11-06 18:42:25,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:25" (3/3) ... [2019-11-06 18:42:25,793 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2019-11-06 18:42:25,803 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:42:25,811 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:42:25,823 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:42:25,845 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:42:25,845 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:42:25,845 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:42:25,845 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:42:25,845 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:42:25,846 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:42:25,846 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:42:25,846 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:42:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-11-06 18:42:25,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:42:25,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:25,872 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:25,874 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:25,880 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2019-11-06 18:42:25,889 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:25,890 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38955382] [2019-11-06 18:42:25,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:26,076 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 18:42:26,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38955382] [2019-11-06 18:42:26,078 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:26,079 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:42:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398951516] [2019-11-06 18:42:26,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:42:26,085 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:26,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:42:26,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:26,105 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-11-06 18:42:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:26,325 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2019-11-06 18:42:26,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:42:26,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-06 18:42:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:26,337 INFO L225 Difference]: With dead ends: 94 [2019-11-06 18:42:26,337 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:42:26,342 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 18:42:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:42:26,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:42:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:42:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-11-06 18:42:26,390 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2019-11-06 18:42:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:26,390 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-11-06 18:42:26,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:42:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-11-06 18:42:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:42:26,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:26,393 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:26,393 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1311438022, now seen corresponding path program 1 times [2019-11-06 18:42:26,394 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:26,394 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594225784] [2019-11-06 18:42:26,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:26,511 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 18:42:26,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594225784] [2019-11-06 18:42:26,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:26,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:26,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685773222] [2019-11-06 18:42:26,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:26,514 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:26,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:26,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:26,515 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 4 states. [2019-11-06 18:42:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:26,708 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-11-06 18:42:26,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:26,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-11-06 18:42:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:26,710 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:42:26,710 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:42:26,714 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 18:42:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:42:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-11-06 18:42:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:42:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-11-06 18:42:26,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2019-11-06 18:42:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:26,736 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-11-06 18:42:26,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-11-06 18:42:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:42:26,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:26,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:26,739 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -953933084, now seen corresponding path program 1 times [2019-11-06 18:42:26,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:26,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278813586] [2019-11-06 18:42:26,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:42:26,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278813586] [2019-11-06 18:42:26,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:26,847 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:26,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636656017] [2019-11-06 18:42:26,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:26,848 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:26,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:26,849 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 4 states. [2019-11-06 18:42:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:27,046 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2019-11-06 18:42:27,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:27,047 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-11-06 18:42:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:27,048 INFO L225 Difference]: With dead ends: 100 [2019-11-06 18:42:27,048 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 18:42:27,049 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 18:42:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 18:42:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-11-06 18:42:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:42:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2019-11-06 18:42:27,058 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2019-11-06 18:42:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:27,059 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2019-11-06 18:42:27,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2019-11-06 18:42:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:42:27,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:27,063 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:27,063 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -753251022, now seen corresponding path program 1 times [2019-11-06 18:42:27,065 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:27,065 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538214408] [2019-11-06 18:42:27,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:42:27,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538214408] [2019-11-06 18:42:27,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78475035] [2019-11-06 18:42:27,252 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 18:42:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:27,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:27,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:42:27,392 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:27,392 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:42:27,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162038134] [2019-11-06 18:42:27,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:42:27,393 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:42:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:42:27,394 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 7 states. [2019-11-06 18:42:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:27,718 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2019-11-06 18:42:27,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:42:27,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-11-06 18:42:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:27,720 INFO L225 Difference]: With dead ends: 133 [2019-11-06 18:42:27,721 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 18:42:27,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:42:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 18:42:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2019-11-06 18:42:27,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-06 18:42:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2019-11-06 18:42:27,744 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 51 [2019-11-06 18:42:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:27,744 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2019-11-06 18:42:27,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:42:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2019-11-06 18:42:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:42:27,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:27,753 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:27,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:27,954 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:27,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:27,954 INFO L82 PathProgramCache]: Analyzing trace with hash 573040542, now seen corresponding path program 2 times [2019-11-06 18:42:27,954 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:27,955 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588683085] [2019-11-06 18:42:27,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:42:28,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588683085] [2019-11-06 18:42:28,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047031361] [2019-11-06 18:42:28,094 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 18:42:28,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:28,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:28,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:42:28,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:42:28,267 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:28,284 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-06 18:42:28,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278112068] [2019-11-06 18:42:28,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:42:28,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:42:28,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:42:28,286 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 9 states. [2019-11-06 18:42:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:28,622 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2019-11-06 18:42:28,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:42:28,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2019-11-06 18:42:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:28,623 INFO L225 Difference]: With dead ends: 171 [2019-11-06 18:42:28,624 INFO L226 Difference]: Without dead ends: 106 [2019-11-06 18:42:28,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:42:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-06 18:42:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2019-11-06 18:42:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-06 18:42:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2019-11-06 18:42:28,635 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 71 [2019-11-06 18:42:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:28,636 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2019-11-06 18:42:28,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:42:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2019-11-06 18:42:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 18:42:28,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:28,637 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:28,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:28,841 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:28,842 INFO L82 PathProgramCache]: Analyzing trace with hash -134036470, now seen corresponding path program 3 times [2019-11-06 18:42:28,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:28,843 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229348107] [2019-11-06 18:42:28,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-06 18:42:28,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229348107] [2019-11-06 18:42:28,974 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770083296] [2019-11-06 18:42:28,974 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 18:42:29,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:42:29,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:29,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:42:29,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-06 18:42:29,313 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:29,313 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:42:29,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831192928] [2019-11-06 18:42:29,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:29,314 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:29,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:29,315 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 8 states. [2019-11-06 18:42:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:29,626 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2019-11-06 18:42:29,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:42:29,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2019-11-06 18:42:29,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:29,628 INFO L225 Difference]: With dead ends: 198 [2019-11-06 18:42:29,628 INFO L226 Difference]: Without dead ends: 123 [2019-11-06 18:42:29,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 18:42:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-06 18:42:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2019-11-06 18:42:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-06 18:42:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2019-11-06 18:42:29,640 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 91 [2019-11-06 18:42:29,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:29,640 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2019-11-06 18:42:29,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2019-11-06 18:42:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 18:42:29,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:29,642 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:29,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:29,850 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1714335960, now seen corresponding path program 4 times [2019-11-06 18:42:29,851 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:29,851 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883404249] [2019-11-06 18:42:29,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-11-06 18:42:29,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883404249] [2019-11-06 18:42:29,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482894368] [2019-11-06 18:42:29,983 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 18:42:30,083 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:30,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:30,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:42:30,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-06 18:42:30,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:30,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-06 18:42:30,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535327959] [2019-11-06 18:42:30,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:42:30,156 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:30,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:42:30,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:30,156 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 12 states. [2019-11-06 18:42:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:30,525 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2019-11-06 18:42:30,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:42:30,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2019-11-06 18:42:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:30,527 INFO L225 Difference]: With dead ends: 245 [2019-11-06 18:42:30,527 INFO L226 Difference]: Without dead ends: 144 [2019-11-06 18:42:30,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-06 18:42:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2019-11-06 18:42:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-06 18:42:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2019-11-06 18:42:30,552 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 109 [2019-11-06 18:42:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:30,554 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2019-11-06 18:42:30,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:42:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2019-11-06 18:42:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 18:42:30,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:30,556 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:30,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:30,757 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash 734792772, now seen corresponding path program 5 times [2019-11-06 18:42:30,758 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:30,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950047763] [2019-11-06 18:42:30,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-06 18:42:31,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950047763] [2019-11-06 18:42:31,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693214019] [2019-11-06 18:42:31,003 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