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-programs/copysome2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:49:23,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:49:23,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:49:23,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:49:23,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:49:23,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:49:23,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:49:23,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:49:23,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:49:23,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:49:23,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:49:23,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:49:23,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:49:23,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:49:23,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:49:23,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:49:23,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:49:23,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:49:23,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:49:23,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:49:23,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:49:23,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:49:23,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:49:23,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:49:23,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:49:23,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:49:23,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:49:23,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:49:23,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:49:23,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:49:23,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:49:23,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:49:23,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:49:23,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:49:23,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:49:23,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:49:23,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:49:23,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:49:23,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:49:23,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:49:23,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:49:23,811 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 21:49:23,828 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:49:23,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:49:23,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:49:23,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:49:23,831 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:49:23,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:49:23,831 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:49:23,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:49:23,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:49:23,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:49:23,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:49:23,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:49:23,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:49:23,833 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:49:23,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:49:23,834 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:49:23,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:49:23,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:49:23,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:49:23,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:49:23,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:49:23,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:49:23,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:49:23,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:49:23,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:49:23,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:49:23,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:49:23,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:49:23,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:49:24,150 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:49:24,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:49:24,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:49:24,174 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:49:24,175 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:49:24,176 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome2-1.i [2019-10-14 21:49:24,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cef265a21/4a1a4d5f76894d29b65c4bd5b878aa78/FLAG2cb498b21 [2019-10-14 21:49:24,646 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:49:24,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome2-1.i [2019-10-14 21:49:24,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cef265a21/4a1a4d5f76894d29b65c4bd5b878aa78/FLAG2cb498b21 [2019-10-14 21:49:25,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cef265a21/4a1a4d5f76894d29b65c4bd5b878aa78 [2019-10-14 21:49:25,035 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:49:25,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:49:25,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:25,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:49:25,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:49:25,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6581bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25, skipping insertion in model container [2019-10-14 21:49:25,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,057 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:49:25,078 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:49:25,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:25,255 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:49:25,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:49:25,293 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:49:25,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25 WrapperNode [2019-10-14 21:49:25,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:49:25,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:49:25,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:49:25,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:49:25,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (1/1) ... [2019-10-14 21:49:25,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:49:25,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:49:25,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:49:25,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:49:25,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (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 [2019-10-14 21:49:25,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:49:25,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:49:25,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:49:25,484 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:49:25,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:49:25,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:49:25,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:25,798 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:25,798 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:49:25,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:25 BoogieIcfgContainer [2019-10-14 21:49:25,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:25,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:25,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:25,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:25,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:49:25" (1/3) ... [2019-10-14 21:49:25,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5622238c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:25, skipping insertion in model container [2019-10-14 21:49:25,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:49:25" (2/3) ... [2019-10-14 21:49:25,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5622238c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:25, skipping insertion in model container [2019-10-14 21:49:25,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:25" (3/3) ... [2019-10-14 21:49:25,807 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2019-10-14 21:49:25,816 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:25,823 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:25,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:25,858 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:25,858 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:25,858 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:25,858 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:25,859 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:25,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:25,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:25,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:25,876 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:49:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:49:25,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:25,883 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:25,884 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 696803616, now seen corresponding path program 1 times [2019-10-14 21:49:25,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:25,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652078173] [2019-10-14 21:49:25,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:25,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:25,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:26,070 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 21:49:26,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652078173] [2019-10-14 21:49:26,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:26,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:26,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033893993] [2019-10-14 21:49:26,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:26,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:26,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:26,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:26,093 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:49:26,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:26,202 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-14 21:49:26,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:26,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:49:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:26,212 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:49:26,212 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:49:26,215 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 21:49:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:49:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:49:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:49:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-14 21:49:26,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 17 [2019-10-14 21:49:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:26,248 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-14 21:49:26,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-14 21:49:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:49:26,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:26,250 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:26,251 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash 123133892, now seen corresponding path program 1 times [2019-10-14 21:49:26,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:26,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429646236] [2019-10-14 21:49:26,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:26,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:26,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:26,330 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 21:49:26,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429646236] [2019-10-14 21:49:26,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:26,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:49:26,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985155214] [2019-10-14 21:49:26,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:26,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:26,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:26,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:26,335 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-14 21:49:26,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:26,438 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-14 21:49:26,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:26,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:49:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:26,440 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:49:26,440 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:49:26,441 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 21:49:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:49:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2019-10-14 21:49:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:49:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 21:49:26,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2019-10-14 21:49:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:26,449 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 21:49:26,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:26,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 21:49:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:49:26,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:26,451 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] [2019-10-14 21:49:26,451 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -204061721, now seen corresponding path program 1 times [2019-10-14 21:49:26,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:26,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771562265] [2019-10-14 21:49:26,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:26,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:26,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:49:26,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771562265] [2019-10-14 21:49:26,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536546187] [2019-10-14 21:49:26,576 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 21:49:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:26,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:26,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:49:26,690 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:26,692 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:49:26,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594303803] [2019-10-14 21:49:26,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:49:26,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:49:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:26,694 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2019-10-14 21:49:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:26,979 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2019-10-14 21:49:26,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:49:26,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-10-14 21:49:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:26,983 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:49:26,983 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:49:26,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:49:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:49:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2019-10-14 21:49:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:49:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-14 21:49:26,997 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 25 [2019-10-14 21:49:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:26,998 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-14 21:49:26,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:49:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-14 21:49:27,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:49:27,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:27,002 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:27,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:27,208 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1317149946, now seen corresponding path program 1 times [2019-10-14 21:49:27,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:27,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612501724] [2019-10-14 21:49:27,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:27,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:27,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-14 21:49:27,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612501724] [2019-10-14 21:49:27,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210417997] [2019-10-14 21:49:27,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:27,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:49:27,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-14 21:49:27,624 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:27,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2019-10-14 21:49:27,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280028444] [2019-10-14 21:49:27,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:49:27,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:27,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:49:27,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:49:27,628 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 16 states. [2019-10-14 21:49:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:28,525 INFO L93 Difference]: Finished difference Result 210 states and 283 transitions. [2019-10-14 21:49:28,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:49:28,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2019-10-14 21:49:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:28,530 INFO L225 Difference]: With dead ends: 210 [2019-10-14 21:49:28,531 INFO L226 Difference]: Without dead ends: 171 [2019-10-14 21:49:28,532 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:49:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-10-14 21:49:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 144. [2019-10-14 21:49:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-14 21:49:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 185 transitions. [2019-10-14 21:49:28,561 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 185 transitions. Word has length 49 [2019-10-14 21:49:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:28,561 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 185 transitions. [2019-10-14 21:49:28,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:49:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 185 transitions. [2019-10-14 21:49:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:49:28,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:28,565 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:28,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:28,768 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash -822665612, now seen corresponding path program 2 times [2019-10-14 21:49:28,770 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:28,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853559090] [2019-10-14 21:49:28,770 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:28,771 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:28,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-10-14 21:49:29,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853559090] [2019-10-14 21:49:29,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488000724] [2019-10-14 21:49:29,128 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 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 21:49:29,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:29,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:29,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:49:29,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2019-10-14 21:49:29,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:49:29,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2019-10-14 21:49:29,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417543166] [2019-10-14 21:49:29,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:49:29,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:29,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:49:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:29,399 INFO L87 Difference]: Start difference. First operand 144 states and 185 transitions. Second operand 27 states. [2019-10-14 21:49:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:31,160 INFO L93 Difference]: Finished difference Result 482 states and 654 transitions. [2019-10-14 21:49:31,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 21:49:31,161 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 81 [2019-10-14 21:49:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:31,164 INFO L225 Difference]: With dead ends: 482 [2019-10-14 21:49:31,164 INFO L226 Difference]: Without dead ends: 361 [2019-10-14 21:49:31,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1145, Invalid=3145, Unknown=0, NotChecked=0, Total=4290 [2019-10-14 21:49:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2019-10-14 21:49:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 256. [2019-10-14 21:49:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-10-14 21:49:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 333 transitions. [2019-10-14 21:49:31,202 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 333 transitions. Word has length 81 [2019-10-14 21:49:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:31,202 INFO L462 AbstractCegarLoop]: Abstraction has 256 states and 333 transitions. [2019-10-14 21:49:31,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:49:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 333 transitions. [2019-10-14 21:49:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:49:31,205 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:31,206 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:31,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:31,410 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash 48136593, now seen corresponding path program 3 times [2019-10-14 21:49:31,411 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:31,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260088147] [2019-10-14 21:49:31,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-10-14 21:49:31,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260088147] [2019-10-14 21:49:31,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362602789] [2019-10-14 21:49:31,879 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 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 21:49:31,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:49:31,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:31,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:31,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2019-10-14 21:49:32,035 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:32,035 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [27] total 29 [2019-10-14 21:49:32,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978981883] [2019-10-14 21:49:32,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:32,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:32,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:32,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:49:32,037 INFO L87 Difference]: Start difference. First operand 256 states and 333 transitions. Second operand 4 states. [2019-10-14 21:49:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:32,092 INFO L93 Difference]: Finished difference Result 405 states and 531 transitions. [2019-10-14 21:49:32,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:32,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-10-14 21:49:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:32,095 INFO L225 Difference]: With dead ends: 405 [2019-10-14 21:49:32,095 INFO L226 Difference]: Without dead ends: 250 [2019-10-14 21:49:32,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:49:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-10-14 21:49:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2019-10-14 21:49:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-10-14 21:49:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 323 transitions. [2019-10-14 21:49:32,119 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 323 transitions. Word has length 121 [2019-10-14 21:49:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:32,120 INFO L462 AbstractCegarLoop]: Abstraction has 250 states and 323 transitions. [2019-10-14 21:49:32,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 323 transitions. [2019-10-14 21:49:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:49:32,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:32,123 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:32,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:32,327 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:32,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2006711379, now seen corresponding path program 4 times [2019-10-14 21:49:32,328 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:32,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780905257] [2019-10-14 21:49:32,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-10-14 21:49:32,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780905257] [2019-10-14 21:49:32,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32272075] [2019-10-14 21:49:32,693 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:32,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:49:32,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:32,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:32,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2019-10-14 21:49:32,861 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:32,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [25] total 27 [2019-10-14 21:49:32,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761316148] [2019-10-14 21:49:32,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:32,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:32,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:32,863 INFO L87 Difference]: Start difference. First operand 250 states and 323 transitions. Second operand 4 states. [2019-10-14 21:49:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:32,927 INFO L93 Difference]: Finished difference Result 401 states and 514 transitions. [2019-10-14 21:49:32,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:32,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2019-10-14 21:49:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:32,930 INFO L225 Difference]: With dead ends: 401 [2019-10-14 21:49:32,930 INFO L226 Difference]: Without dead ends: 234 [2019-10-14 21:49:32,932 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:49:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-10-14 21:49:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2019-10-14 21:49:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-10-14 21:49:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2019-10-14 21:49:32,953 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 121 [2019-10-14 21:49:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:32,953 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2019-10-14 21:49:32,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2019-10-14 21:49:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:49:32,958 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:32,959 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:33,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:33,163 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:33,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1600423597, now seen corresponding path program 5 times [2019-10-14 21:49:33,164 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:33,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603432917] [2019-10-14 21:49:33,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2019-10-14 21:49:33,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603432917] [2019-10-14 21:49:33,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981483498] [2019-10-14 21:49:33,366 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true