java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:44:06,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:44:06,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:44:06,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:44:06,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:44:06,816 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:44:06,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:44:06,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:44:06,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:44:06,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:44:06,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:44:06,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:44:06,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:44:06,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:44:06,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:44:06,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:44:06,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:44:06,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:44:06,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:44:06,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:44:06,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:44:06,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:44:06,845 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:44:06,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:44:06,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:44:06,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:44:06,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:44:06,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:44:06,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:44:06,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:44:06,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:44:06,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:44:06,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:44:06,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:44:06,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:44:06,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:44:06,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:44:06,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:44:06,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:44:06,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:44:06,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:44:06,860 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 21:44:06,874 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:44:06,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:44:06,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:44:06,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:44:06,876 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:44:06,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:44:06,876 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:44:06,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:44:06,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:44:06,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:44:06,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:44:06,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:44:06,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:44:06,878 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:44:06,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:44:06,878 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:44:06,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:44:06,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:44:06,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:44:06,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:44:06,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:44:06,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:44:06,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:44:06,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:44:06,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:44:06,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:44:06,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:44:06,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:44:06,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:44:07,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:44:07,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:44:07,214 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:44:07,215 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:44:07,216 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:44:07,216 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-10-14 21:44:07,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0705daf/86b374e1bcc14381a92b111a79a05d4b/FLAGd58737c94 [2019-10-14 21:44:07,793 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:44:07,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-10-14 21:44:07,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0705daf/86b374e1bcc14381a92b111a79a05d4b/FLAGd58737c94 [2019-10-14 21:44:08,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0705daf/86b374e1bcc14381a92b111a79a05d4b [2019-10-14 21:44:08,164 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:44:08,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:44:08,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:08,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:44:08,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:44:08,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef43f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08, skipping insertion in model container [2019-10-14 21:44:08,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,185 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:44:08,205 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:44:08,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:08,428 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:44:08,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:44:08,573 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:44:08,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08 WrapperNode [2019-10-14 21:44:08,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:44:08,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:44:08,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:44:08,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:44:08,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (1/1) ... [2019-10-14 21:44:08,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:44:08,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:44:08,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:44:08,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:44:08,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (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 21:44:08,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:44:08,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:44:08,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:44:08,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:44:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:44:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:44:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:44:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:44:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:44:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:44:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:44:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:44:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:44:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:44:09,156 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:44:09,156 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-14 21:44:09,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:09 BoogieIcfgContainer [2019-10-14 21:44:09,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:44:09,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:44:09,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:44:09,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:44:09,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:44:08" (1/3) ... [2019-10-14 21:44:09,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc2c070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:09, skipping insertion in model container [2019-10-14 21:44:09,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:44:08" (2/3) ... [2019-10-14 21:44:09,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc2c070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:44:09, skipping insertion in model container [2019-10-14 21:44:09,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:44:09" (3/3) ... [2019-10-14 21:44:09,167 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2019-10-14 21:44:09,176 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:44:09,184 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:44:09,195 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:44:09,220 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:44:09,220 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:44:09,220 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:44:09,220 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:44:09,221 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:44:09,221 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:44:09,221 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:44:09,221 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:44:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-10-14 21:44:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:44:09,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:09,246 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 21:44:09,248 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:09,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash -178932642, now seen corresponding path program 1 times [2019-10-14 21:44:09,260 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:09,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077839066] [2019-10-14 21:44:09,260 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,461 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 21:44:09,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077839066] [2019-10-14 21:44:09,463 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:09,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:44:09,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577570565] [2019-10-14 21:44:09,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:44:09,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:44:09,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:44:09,491 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2019-10-14 21:44:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:09,707 INFO L93 Difference]: Finished difference Result 94 states and 137 transitions. [2019-10-14 21:44:09,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:44:09,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-10-14 21:44:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:09,719 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:44:09,719 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:44:09,723 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 21:44:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:44:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:44:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:44:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-14 21:44:09,773 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 31 [2019-10-14 21:44:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:09,774 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-14 21:44:09,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:44:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-14 21:44:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:44:09,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:09,776 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 21:44:09,776 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1311438022, now seen corresponding path program 1 times [2019-10-14 21:44:09,777 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:09,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133495567] [2019-10-14 21:44:09,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:09,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:09,905 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 21:44:09,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133495567] [2019-10-14 21:44:09,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:09,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:09,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996868030] [2019-10-14 21:44:09,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:09,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:09,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:09,909 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 4 states. [2019-10-14 21:44:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:10,090 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-10-14 21:44:10,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:10,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2019-10-14 21:44:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:10,093 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:44:10,093 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:44:10,095 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 21:44:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:44:10,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 21:44:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:44:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-10-14 21:44:10,105 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 31 [2019-10-14 21:44:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:10,105 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-10-14 21:44:10,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-10-14 21:44:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:44:10,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:10,107 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] [2019-10-14 21:44:10,108 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash -953933084, now seen corresponding path program 1 times [2019-10-14 21:44:10,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:10,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820869562] [2019-10-14 21:44:10,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:10,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:10,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:10,242 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 21:44:10,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820869562] [2019-10-14 21:44:10,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:44:10,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:44:10,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610636526] [2019-10-14 21:44:10,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:44:10,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:10,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:44:10,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:44:10,252 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 4 states. [2019-10-14 21:44:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:10,517 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2019-10-14 21:44:10,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:44:10,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2019-10-14 21:44:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:10,520 INFO L225 Difference]: With dead ends: 100 [2019-10-14 21:44:10,520 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:44:10,521 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 21:44:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:44:10,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2019-10-14 21:44:10,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:44:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2019-10-14 21:44:10,538 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 33 [2019-10-14 21:44:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:10,540 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2019-10-14 21:44:10,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:44:10,540 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2019-10-14 21:44:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:44:10,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:10,544 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, 1, 1, 1, 1] [2019-10-14 21:44:10,545 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -753251022, now seen corresponding path program 1 times [2019-10-14 21:44:10,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:10,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473269564] [2019-10-14 21:44:10,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:10,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:10,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:44:10,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473269564] [2019-10-14 21:44:10,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108386073] [2019-10-14 21:44:10,723 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 21:44:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:10,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:44:10,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:44:10,863 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:10,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:44:10,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749018708] [2019-10-14 21:44:10,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:44:10,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:44:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:10,867 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 7 states. [2019-10-14 21:44:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:11,132 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2019-10-14 21:44:11,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:11,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2019-10-14 21:44:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:11,133 INFO L225 Difference]: With dead ends: 133 [2019-10-14 21:44:11,134 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 21:44:11,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:44:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 21:44:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2019-10-14 21:44:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:44:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2019-10-14 21:44:11,145 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 51 [2019-10-14 21:44:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:11,146 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2019-10-14 21:44:11,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:44:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2019-10-14 21:44:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:44:11,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:11,148 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:11,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:11,353 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:11,354 INFO L82 PathProgramCache]: Analyzing trace with hash 573040542, now seen corresponding path program 2 times [2019-10-14 21:44:11,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:11,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790684691] [2019-10-14 21:44:11,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:11,355 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:11,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:44:11,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790684691] [2019-10-14 21:44:11,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125551247] [2019-10-14 21:44:11,558 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 21:44:11,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:44:11,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:11,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:44:11,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:44:11,722 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:11,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 21:44:11,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485213252] [2019-10-14 21:44:11,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:44:11,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:44:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:11,727 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 9 states. [2019-10-14 21:44:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:12,058 INFO L93 Difference]: Finished difference Result 171 states and 200 transitions. [2019-10-14 21:44:12,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:44:12,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2019-10-14 21:44:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:12,060 INFO L225 Difference]: With dead ends: 171 [2019-10-14 21:44:12,060 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 21:44:12,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:44:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 21:44:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2019-10-14 21:44:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-14 21:44:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2019-10-14 21:44:12,071 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 71 [2019-10-14 21:44:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:12,072 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2019-10-14 21:44:12,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:44:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2019-10-14 21:44:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 21:44:12,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:12,075 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:12,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:12,277 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:12,277 INFO L82 PathProgramCache]: Analyzing trace with hash -134036470, now seen corresponding path program 3 times [2019-10-14 21:44:12,277 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:12,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368794797] [2019-10-14 21:44:12,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:12,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:44:12,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368794797] [2019-10-14 21:44:12,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935863763] [2019-10-14 21:44:12,424 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 21:44:12,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:44:12,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:12,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:12,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:44:12,834 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:12,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:44:12,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217923826] [2019-10-14 21:44:12,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:44:12,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:44:12,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:12,838 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 8 states. [2019-10-14 21:44:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:13,129 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2019-10-14 21:44:13,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:44:13,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2019-10-14 21:44:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:13,131 INFO L225 Difference]: With dead ends: 198 [2019-10-14 21:44:13,131 INFO L226 Difference]: Without dead ends: 123 [2019-10-14 21:44:13,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:44:13,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-14 21:44:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2019-10-14 21:44:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 21:44:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2019-10-14 21:44:13,145 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 91 [2019-10-14 21:44:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:13,146 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2019-10-14 21:44:13,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:44:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2019-10-14 21:44:13,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 21:44:13,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:13,152 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:13,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:13,353 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1714335960, now seen corresponding path program 4 times [2019-10-14 21:44:13,353 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:13,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247181403] [2019-10-14 21:44:13,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:13,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:13,529 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 21:44:13,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247181403] [2019-10-14 21:44:13,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802835242] [2019-10-14 21:44:13,530 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 21:44:13,631 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:44:13,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:44:13,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:44:13,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:44:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:44:13,701 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:44:13,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-10-14 21:44:13,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116008942] [2019-10-14 21:44:13,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:44:13,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:44:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:44:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:13,703 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand 12 states. [2019-10-14 21:44:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:44:14,057 INFO L93 Difference]: Finished difference Result 245 states and 274 transitions. [2019-10-14 21:44:14,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:44:14,057 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 109 [2019-10-14 21:44:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:44:14,058 INFO L225 Difference]: With dead ends: 245 [2019-10-14 21:44:14,059 INFO L226 Difference]: Without dead ends: 144 [2019-10-14 21:44:14,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:44:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-14 21:44:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2019-10-14 21:44:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-14 21:44:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2019-10-14 21:44:14,071 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 109 [2019-10-14 21:44:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:44:14,071 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2019-10-14 21:44:14,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:44:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2019-10-14 21:44:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 21:44:14,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:44:14,074 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:44:14,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:44:14,279 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:44:14,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:44:14,280 INFO L82 PathProgramCache]: Analyzing trace with hash 734792772, now seen corresponding path program 5 times [2019-10-14 21:44:14,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:44:14,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493490172] [2019-10-14 21:44:14,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:44:14,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:44:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:44:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-10-14 21:44:14,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493490172] [2019-10-14 21:44:14,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857008210] [2019-10-14 21:44:14,548 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