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/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:25,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:25,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:25,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:25,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:25,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:25,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:25,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:25,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:25,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:25,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:25,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:25,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:25,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:25,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:25,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:25,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:25,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:25,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:25,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:25,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:25,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:25,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:25,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:25,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:16:25,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:16:25,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:16:25,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:16:25,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:16:25,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:16:25,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:25,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:25,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:25,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:25,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:25,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:25,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:25,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:25,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:25,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:25,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:25,190 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 23:16:25,220 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:25,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:25,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:25,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:25,223 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:25,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:25,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:25,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:25,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:25,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:25,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:25,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:25,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:25,225 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:25,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:25,226 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:25,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:25,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:25,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:25,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:25,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:25,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:25,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:25,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:25,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:25,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:25,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:25,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:25,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:25,517 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:25,529 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:25,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:25,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:25,534 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:25,535 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2019-10-14 23:16:25,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad34e72f9/c798e0c9d004400fbe1cb14200cdabf1/FLAG21550a3db [2019-10-14 23:16:26,092 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:26,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2019-10-14 23:16:26,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad34e72f9/c798e0c9d004400fbe1cb14200cdabf1/FLAG21550a3db [2019-10-14 23:16:26,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad34e72f9/c798e0c9d004400fbe1cb14200cdabf1 [2019-10-14 23:16:26,467 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:26,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:26,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:26,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:26,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:26,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b8a29d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26, skipping insertion in model container [2019-10-14 23:16:26,478 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,485 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:26,509 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:26,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:26,757 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:26,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:26,899 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:26,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26 WrapperNode [2019-10-14 23:16:26,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:26,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:26,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:26,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:26,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (1/1) ... [2019-10-14 23:16:26,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:26,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:26,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:26,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:26,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (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 23:16:27,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:27,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:27,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:27,015 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2019-10-14 23:16:27,015 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:27,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2019-10-14 23:16:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2019-10-14 23:16:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2019-10-14 23:16:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2019-10-14 23:16:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2019-10-14 23:16:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:16:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:27,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:27,483 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-14 23:16:27,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:27 BoogieIcfgContainer [2019-10-14 23:16:27,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:27,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:27,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:27,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:27,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:26" (1/3) ... [2019-10-14 23:16:27,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173c6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:27, skipping insertion in model container [2019-10-14 23:16:27,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:26" (2/3) ... [2019-10-14 23:16:27,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173c6ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:27, skipping insertion in model container [2019-10-14 23:16:27,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:27" (3/3) ... [2019-10-14 23:16:27,493 INFO L109 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2019-10-14 23:16:27,503 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:27,510 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:27,521 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:27,545 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:27,546 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:27,546 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:27,546 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:27,546 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:27,547 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:27,547 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:27,547 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2019-10-14 23:16:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:16:27,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:27,573 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:27,575 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:27,580 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2019-10-14 23:16:27,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:27,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441946197] [2019-10-14 23:16:27,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:27,837 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 23:16:27,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441946197] [2019-10-14 23:16:27,842 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:27,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:27,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779802310] [2019-10-14 23:16:27,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:27,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:27,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:27,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:27,881 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2019-10-14 23:16:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:28,136 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2019-10-14 23:16:28,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:28,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-14 23:16:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:28,149 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:16:28,149 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:16:28,154 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 23:16:28,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:16:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-10-14 23:16:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:16:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 23:16:28,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2019-10-14 23:16:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:28,207 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 23:16:28,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 23:16:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:16:28,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:28,208 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:28,209 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2019-10-14 23:16:28,210 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:28,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498287455] [2019-10-14 23:16:28,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,210 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,341 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 23:16:28,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498287455] [2019-10-14 23:16:28,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:28,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:16:28,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932933210] [2019-10-14 23:16:28,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:28,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:28,345 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2019-10-14 23:16:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:28,524 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-10-14 23:16:28,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:28,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-10-14 23:16:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:28,526 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:16:28,526 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:16:28,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:16:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2019-10-14 23:16:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:16:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 23:16:28,542 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2019-10-14 23:16:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:28,542 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 23:16:28,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 23:16:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:16:28,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:28,546 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:28,546 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:28,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2019-10-14 23:16:28,547 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:28,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102129751] [2019-10-14 23:16:28,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:28,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:28,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102129751] [2019-10-14 23:16:28,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009334306] [2019-10-14 23:16:28,669 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 23:16:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:28,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:28,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:28,790 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:28,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 23:16:28,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020820805] [2019-10-14 23:16:28,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:16:28,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:28,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:16:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:28,794 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2019-10-14 23:16:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:28,958 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-14 23:16:28,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:16:28,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-10-14 23:16:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:28,960 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:16:28,960 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:16:28,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:16:28,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-10-14 23:16:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:16:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 23:16:28,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2019-10-14 23:16:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:28,968 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 23:16:28,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:16:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 23:16:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:16:28,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:28,969 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:29,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:29,173 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:29,174 INFO L82 PathProgramCache]: Analyzing trace with hash -232421100, now seen corresponding path program 2 times [2019-10-14 23:16:29,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:29,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644402376] [2019-10-14 23:16:29,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:29,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644402376] [2019-10-14 23:16:29,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347938784] [2019-10-14 23:16:29,314 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 23:16:29,390 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:29,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:29,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:29,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:29,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:29,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-10-14 23:16:29,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942343314] [2019-10-14 23:16:29,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:16:29,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:29,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:16:29,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:29,459 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2019-10-14 23:16:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:29,644 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-14 23:16:29,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:16:29,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-10-14 23:16:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:29,646 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:16:29,646 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:16:29,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:16:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-10-14 23:16:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 23:16:29,654 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-10-14 23:16:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:29,655 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 23:16:29,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:16:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 23:16:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:16:29,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:29,656 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:29,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:29,863 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:29,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:29,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1802018317, now seen corresponding path program 3 times [2019-10-14 23:16:29,864 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:29,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354647328] [2019-10-14 23:16:29,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354647328] [2019-10-14 23:16:30,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266148876] [2019-10-14 23:16:30,036 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 23:16:30,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:16:30,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:30,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:30,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:16:30,118 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:30,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2019-10-14 23:16:30,119 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495305645] [2019-10-14 23:16:30,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:30,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:30,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:30,121 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2019-10-14 23:16:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:30,166 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2019-10-14 23:16:30,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:30,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-14 23:16:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:30,167 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:16:30,167 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:16:30,168 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:16:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2019-10-14 23:16:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:16:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 23:16:30,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2019-10-14 23:16:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:30,176 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 23:16:30,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 23:16:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:16:30,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:30,177 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:30,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:30,389 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:30,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:30,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1471880625, now seen corresponding path program 1 times [2019-10-14 23:16:30,390 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:30,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545930723] [2019-10-14 23:16:30,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:30,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:30,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545930723] [2019-10-14 23:16:30,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983520682] [2019-10-14 23:16:30,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:16:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:30,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:16:30,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,671 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:30,671 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-10-14 23:16:30,671 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028787280] [2019-10-14 23:16:30,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:16:30,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:30,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:16:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:16:30,674 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 12 states. [2019-10-14 23:16:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:30,870 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2019-10-14 23:16:30,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:16:30,870 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-10-14 23:16:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:30,871 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:16:30,871 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:16:30,872 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:16:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:16:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-10-14 23:16:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:16:30,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-14 23:16:30,879 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 24 [2019-10-14 23:16:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:30,879 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-14 23:16:30,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:16:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-14 23:16:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:30,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:30,881 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:31,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:31,091 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash -479010360, now seen corresponding path program 2 times [2019-10-14 23:16:31,092 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:31,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410366323] [2019-10-14 23:16:31,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:31,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:31,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:31,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410366323] [2019-10-14 23:16:31,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413147318] [2019-10-14 23:16:31,440 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 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 23:16:31,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:31,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:31,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:16:31,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:31,626 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:31,627 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-10-14 23:16:31,627 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903660416] [2019-10-14 23:16:31,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:16:31,628 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:16:31,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:16:31,629 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 19 states. [2019-10-14 23:16:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:33,430 INFO L93 Difference]: Finished difference Result 157 states and 199 transitions. [2019-10-14 23:16:33,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 23:16:33,431 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 28 [2019-10-14 23:16:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:33,434 INFO L225 Difference]: With dead ends: 157 [2019-10-14 23:16:33,434 INFO L226 Difference]: Without dead ends: 130 [2019-10-14 23:16:33,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2019-10-14 23:16:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-14 23:16:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2019-10-14 23:16:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 23:16:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2019-10-14 23:16:33,453 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 28 [2019-10-14 23:16:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:33,454 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2019-10-14 23:16:33,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:16:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2019-10-14 23:16:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:16:33,455 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:33,455 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:33,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:33,659 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:33,660 INFO L82 PathProgramCache]: Analyzing trace with hash -801997631, now seen corresponding path program 3 times [2019-10-14 23:16:33,660 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:33,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039163131] [2019-10-14 23:16:33,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:33,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:33,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:33,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039163131] [2019-10-14 23:16:33,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297476714] [2019-10-14 23:16:33,776 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:33,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:16:33,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:33,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:16:33,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:33,917 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:33,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-10-14 23:16:33,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429354954] [2019-10-14 23:16:33,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:16:33,918 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:33,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:16:33,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:16:33,919 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 16 states. [2019-10-14 23:16:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:34,140 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2019-10-14 23:16:34,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:16:34,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-10-14 23:16:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:34,148 INFO L225 Difference]: With dead ends: 248 [2019-10-14 23:16:34,148 INFO L226 Difference]: Without dead ends: 155 [2019-10-14 23:16:34,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:16:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-10-14 23:16:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2019-10-14 23:16:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 23:16:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2019-10-14 23:16:34,163 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 32 [2019-10-14 23:16:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:34,164 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2019-10-14 23:16:34,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:16:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2019-10-14 23:16:34,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:16:34,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:34,165 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:34,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:34,370 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:34,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:34,371 INFO L82 PathProgramCache]: Analyzing trace with hash -850791622, now seen corresponding path program 4 times [2019-10-14 23:16:34,372 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:34,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836074181] [2019-10-14 23:16:34,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:16:34,440 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-14 23:16:34,440 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-14 23:16:34,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:34 BoogieIcfgContainer [2019-10-14 23:16:34,490 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:34,492 INFO L168 Benchmark]: Toolchain (without parser) took 8023.30 ms. Allocated memory was 138.9 MB in the beginning and 281.5 MB in the end (delta: 142.6 MB). Free memory was 103.3 MB in the beginning and 117.5 MB in the end (delta: -14.2 MB). Peak memory consumption was 128.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:34,493 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:16:34,494 INFO L168 Benchmark]: CACSL2BoogieTranslator took 430.70 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 103.1 MB in the beginning and 178.9 MB in the end (delta: -75.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:34,495 INFO L168 Benchmark]: Boogie Preprocessor took 52.10 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:34,496 INFO L168 Benchmark]: RCFGBuilder took 531.85 ms. Allocated memory is still 202.4 MB. Free memory was 176.3 MB in the beginning and 149.5 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:34,497 INFO L168 Benchmark]: TraceAbstraction took 7004.12 ms. Allocated memory was 202.4 MB in the beginning and 281.5 MB in the end (delta: 79.2 MB). Free memory was 148.9 MB in the beginning and 117.5 MB in the end (delta: 31.4 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:34,500 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 430.70 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 103.1 MB in the beginning and 178.9 MB in the end (delta: -75.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.10 ms. Allocated memory is still 202.4 MB. Free memory was 178.9 MB in the beginning and 176.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 531.85 ms. Allocated memory is still 202.4 MB. Free memory was 176.3 MB in the beginning and 149.5 MB in the end (delta: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7004.12 ms. Allocated memory was 202.4 MB in the beginning and 281.5 MB in the end (delta: 79.2 MB). Free memory was 148.9 MB in the beginning and 117.5 MB in the end (delta: 31.4 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of to_real at line 96, overapproximation of someBinaryArithmeticDOUBLEoperation at line 98. Possible FailurePath: [L69] double a[50][50], b[50], x[50]; VAL [\old(a)=20009, \old(a)=20012, \old(b)=20005, \old(b)=20015, \old(x)=20007, \old(x)=20006, a={1:0}, b={-1:0}, x={2:0}] [L86] int i, j, nmax = 50, n = 5, chkerr; [L87] double eps, w; [L89] eps = 1.0e-6 [L91] i = 0 VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, n=5, nmax=50, x={2:0}] [L91] COND TRUE i <= n [L93] w = 0.0 [L94] j = 0 VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={2:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=0, n=5, nmax=50, w=0, x={2:0}] [L97] COND TRUE i == j [L97] EXPR a[i][j] [L97] a[i][j] *= 10.0 [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={2:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={2:0}] [L97] COND FALSE !(i == j) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=1, n=5, nmax=50, x={2:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={2:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={2:0}] [L97] COND FALSE !(i == j) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=2, n=5, nmax=50, x={2:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={2:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={2:0}] [L97] COND FALSE !(i == j) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=3, n=5, nmax=50, x={2:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={2:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={2:0}] [L97] COND FALSE !(i == j) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=4, n=5, nmax=50, x={2:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={2:0}] [L94] COND TRUE j <= n [L96] a[i][j] = (i + 1) + (j + 1) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={2:0}] [L97] COND FALSE !(i == j) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=5, n=5, nmax=50, x={2:0}] [L98] EXPR a[i][j] [L98] w += a[i][j] [L94] j++ VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={2:0}] [L94] COND FALSE !(j <= n) VAL [a={1:0}, b={-1:0}, eps=1/1000000, i=0, j=6, n=5, nmax=50, x={2:0}] [L100] CALL __VERIFIER_assert(i==2) VAL [\old(cond)=0, a={1:0}, b={-1:0}, x={2:0}] [L4] COND TRUE !(cond) VAL [\old(cond)=0, a={1:0}, b={-1:0}, cond=0, x={2:0}] [L5] __VERIFIER_error() VAL [\old(cond)=0, a={1:0}, b={-1:0}, cond=0, x={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Result: UNSAFE, OverallTime: 6.9s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 412 SDslu, 302 SDs, 0 SdLazy, 832 SolverSat, 182 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 348 NumberOfCodeBlocks, 344 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 39292 SizeOfPredicates, 12 NumberOfNonLiveVariables, 696 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 15/220 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...