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_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:04,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:04,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:04,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:04,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:04,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:04,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:04,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:04,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:04,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:04,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:04,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:04,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:04,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:04,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:04,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:04,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:04,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:04,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:04,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:04,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:04,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:04,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:04,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:04,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:44:04,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:04,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:04,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:04,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:04,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:04,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:04,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:04,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:04,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:04,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:04,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:04,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:44:04,790 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:04,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:04,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:04,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:04,793 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:04,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:04,793 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:04,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:04,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:04,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:04,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:04,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:04,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:04,795 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:04,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:04,795 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:04,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:04,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:04,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:04,796 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:04,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:04,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:04,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:04,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:04,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:04,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:04,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:04,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:04,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:05,115 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:05,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:05,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:05,140 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:05,140 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:05,141 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-10-14 21:44:05,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec82a0e6/27e60fb896194aaebb10c457a034c217/FLAG2fb3f22da [2019-10-14 21:44:05,676 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:05,679 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-10-14 21:44:05,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec82a0e6/27e60fb896194aaebb10c457a034c217/FLAG2fb3f22da [2019-10-14 21:44:06,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec82a0e6/27e60fb896194aaebb10c457a034c217 [2019-10-14 21:44:06,061 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:06,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:06,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:06,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:06,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:06,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364da557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06, skipping insertion in model container [2019-10-14 21:44:06,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,079 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:06,104 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:06,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:06,309 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:06,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:06,460 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:06,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06 WrapperNode [2019-10-14 21:44:06,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:06,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:06,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:06,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:06,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... [2019-10-14 21:44:06,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:06,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:06,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:06,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:06,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:06,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:06,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:06,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:44:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:06,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:07,029 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:07,029 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-14 21:44:07,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:07 BoogieIcfgContainer [2019-10-14 21:44:07,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:07,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:07,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:07,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:07,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:06" (1/3) ... [2019-10-14 21:44:07,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c073e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:07, skipping insertion in model container [2019-10-14 21:44:07,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:06" (2/3) ... [2019-10-14 21:44:07,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c073e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:07, skipping insertion in model container [2019-10-14 21:44:07,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:07" (3/3) ... [2019-10-14 21:44:07,040 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2019-10-14 21:44:07,050 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:07,058 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:07,068 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:07,094 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:07,095 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:07,095 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:07,095 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:07,096 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:07,096 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:07,096 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:07,096 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-10-14 21:44:07,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:44:07,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:07,123 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:07,125 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:07,129 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2019-10-14 21:44:07,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:07,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515195311] [2019-10-14 21:44:07,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:07,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:07,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:07,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515195311] [2019-10-14 21:44:07,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:07,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:07,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792955488] [2019-10-14 21:44:07,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:07,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:07,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:07,362 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2019-10-14 21:44:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:07,567 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2019-10-14 21:44:07,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:07,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-10-14 21:44:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:07,577 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:44:07,578 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:44:07,581 INFO L600 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 [2019-10-14 21:44:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:44:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 21:44:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:44:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-14 21:44:07,630 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-10-14 21:44:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:07,631 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-14 21:44:07,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-14 21:44:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:44:07,633 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:07,633 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:07,634 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:07,635 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2019-10-14 21:44:07,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:07,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265766218] [2019-10-14 21:44:07,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:07,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:07,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:44:07,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265766218] [2019-10-14 21:44:07,759 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:07,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:07,759 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640670296] [2019-10-14 21:44:07,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:07,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:07,762 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-10-14 21:44:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:07,914 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-10-14 21:44:07,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:07,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 21:44:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:07,916 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:44:07,916 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:44:07,918 INFO L600 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 [2019-10-14 21:44:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:44:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:44:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:44:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-14 21:44:07,928 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2019-10-14 21:44:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:07,928 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-14 21:44:07,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:07,928 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-14 21:44:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:44:07,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:07,930 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:07,930 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:07,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1833019696, now seen corresponding path program 1 times [2019-10-14 21:44:07,931 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:07,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2449065] [2019-10-14 21:44:07,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:07,932 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:07,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:44:08,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2449065] [2019-10-14 21:44:08,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:08,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:08,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926181748] [2019-10-14 21:44:08,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:08,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:08,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:08,034 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 4 states. [2019-10-14 21:44:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:08,233 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-10-14 21:44:08,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:08,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-10-14 21:44:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:08,236 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:44:08,236 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:44:08,237 INFO L600 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 [2019-10-14 21:44:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:44:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2019-10-14 21:44:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:44:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-10-14 21:44:08,246 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 31 [2019-10-14 21:44:08,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:08,247 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-10-14 21:44:08,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:08,247 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-10-14 21:44:08,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:44:08,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:08,249 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:08,249 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:08,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:08,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2019-10-14 21:44:08,250 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:08,250 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924920429] [2019-10-14 21:44:08,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:08,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:08,251 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:44:08,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924920429] [2019-10-14 21:44:08,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877200705] [2019-10-14 21:44:08,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:08,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:08,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:44:08,549 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:08,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:44:08,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699156363] [2019-10-14 21:44:08,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:08,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:08,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:08,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:08,553 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2019-10-14 21:44:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:08,828 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2019-10-14 21:44:08,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:08,829 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-10-14 21:44:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:08,830 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:44:08,830 INFO L226 Difference]: Without dead ends: 79 [2019-10-14 21:44:08,831 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-14 21:44:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2019-10-14 21:44:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:44:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-10-14 21:44:08,851 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 47 [2019-10-14 21:44:08,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:08,852 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-10-14 21:44:08,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:08,854 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-10-14 21:44:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:44:08,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:08,857 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:44:09,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:09,059 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:09,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1765015214, now seen corresponding path program 2 times [2019-10-14 21:44:09,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:09,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307339812] [2019-10-14 21:44:09,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:44:09,209 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307339812] [2019-10-14 21:44:09,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151394952] [2019-10-14 21:44:09,210 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 [2019-10-14 21:44:09,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:09,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:09,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:09,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:44:09,319 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:09,319 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:44:09,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043202078] [2019-10-14 21:44:09,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:09,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:09,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:09,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:09,324 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 7 states. [2019-10-14 21:44:09,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:09,491 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-10-14 21:44:09,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:44:09,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2019-10-14 21:44:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:09,493 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:44:09,494 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:44:09,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:44:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 21:44:09,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:44:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2019-10-14 21:44:09,516 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 65 [2019-10-14 21:44:09,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:09,516 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2019-10-14 21:44:09,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2019-10-14 21:44:09,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:44:09,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:09,520 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-10-14 21:44:09,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:09,721 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1302503220, now seen corresponding path program 3 times [2019-10-14 21:44:09,722 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:09,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318282046] [2019-10-14 21:44:09,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:44:09,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318282046] [2019-10-14 21:44:09,888 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211622771] [2019-10-14 21:44:09,888 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 [2019-10-14 21:44:09,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:44:09,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:09,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:09,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:44:10,027 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:10,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:44:10,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127852878] [2019-10-14 21:44:10,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:44:10,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:44:10,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:10,030 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand 10 states. [2019-10-14 21:44:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:10,367 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2019-10-14 21:44:10,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:44:10,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-10-14 21:44:10,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:10,370 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:44:10,370 INFO L226 Difference]: Without dead ends: 99 [2019-10-14 21:44:10,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:44:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-14 21:44:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2019-10-14 21:44:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-14 21:44:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2019-10-14 21:44:10,397 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 67 [2019-10-14 21:44:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:10,398 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2019-10-14 21:44:10,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:44:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2019-10-14 21:44:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:44:10,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:10,403 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 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] [2019-10-14 21:44:10,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:10,615 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:10,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2145096026, now seen corresponding path program 4 times [2019-10-14 21:44:10,616 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:10,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130912006] [2019-10-14 21:44:10,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:10,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:10,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:44:10,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130912006] [2019-10-14 21:44:10,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211224025] [2019-10-14 21:44:10,747 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 [2019-10-14 21:44:10,840 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:10,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:10,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:10,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 21:44:10,953 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:10,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-10-14 21:44:10,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246341796] [2019-10-14 21:44:10,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:44:10,956 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:10,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:44:10,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:10,958 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand 12 states. [2019-10-14 21:44:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:11,295 INFO L93 Difference]: Finished difference Result 192 states and 218 transitions. [2019-10-14 21:44:11,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:44:11,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2019-10-14 21:44:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:11,297 INFO L225 Difference]: With dead ends: 192 [2019-10-14 21:44:11,297 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:44:11,298 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:44:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2019-10-14 21:44:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-14 21:44:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2019-10-14 21:44:11,322 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 85 [2019-10-14 21:44:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:11,325 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2019-10-14 21:44:11,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:44:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2019-10-14 21:44:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 21:44:11,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:11,329 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2019-10-14 21:44:11,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:11,542 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:11,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:11,542 INFO L82 PathProgramCache]: Analyzing trace with hash -613385624, now seen corresponding path program 5 times [2019-10-14 21:44:11,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:11,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126874600] [2019-10-14 21:44:11,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:11,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:11,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-10-14 21:44:11,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126874600] [2019-10-14 21:44:11,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294971350] [2019-10-14 21:44:11,693 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