/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:57:49,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 14:57:49,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 14:57:49,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 14:57:49,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 14:57:49,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 14:57:49,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 14:57:49,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 14:57:49,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 14:57:49,628 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 14:57:49,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 14:57:49,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 14:57:49,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:57:49,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:57:49,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:57:49,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:57:49,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:57:49,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:57:49,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:57:49,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:57:49,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:57:49,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:57:49,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:57:49,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:57:49,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 14:57:49,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 14:57:49,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 14:57:49,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 14:57:49,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 14:57:49,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 14:57:49,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 14:57:49,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 14:57:49,657 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 14:57:49,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 14:57:49,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 14:57:49,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 14:57:49,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 14:57:49,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 14:57:49,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:57:49,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:57:49,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:57:49,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:57:49,710 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:57:49,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:57:49,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:57:49,712 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:57:49,712 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:57:49,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:57:49,713 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:57:49,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:57:49,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:57:49,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:57:49,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:57:49,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:57:49,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:57:49,714 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:57:49,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:57:49,714 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:57:49,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:57:49,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:57:49,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:57:49,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:57:49,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:57:49,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:57:49,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:57:49,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:57:49,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:57:49,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:57:49,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:57:49,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:57:49,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:57:49,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:57:50,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:57:50,256 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:57:50,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:57:50,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:57:50,265 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:57:50,267 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-09-24 14:57:50,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563c5dd19/51bd2bb6c260475da7383c059723b404/FLAG137fd247e [2020-09-24 14:57:50,872 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:57:50,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-09-24 14:57:50,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563c5dd19/51bd2bb6c260475da7383c059723b404/FLAG137fd247e [2020-09-24 14:57:51,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/563c5dd19/51bd2bb6c260475da7383c059723b404 [2020-09-24 14:57:51,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:57:51,203 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:57:51,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:57:51,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:57:51,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:57:51,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217a2c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51, skipping insertion in model container [2020-09-24 14:57:51,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:57:51,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:57:51,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:57:51,561 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:57:51,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:57:51,599 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:57:51,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51 WrapperNode [2020-09-24 14:57:51,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:57:51,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:57:51,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:57:51,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:57:51,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... [2020-09-24 14:57:51,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:57:51,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:57:51,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:57:51,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:57:51,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 14:57:51,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:57:51,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:57:51,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:57:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:57:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-24 14:57:51,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:57:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-24 14:57:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:57:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:57:51,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:57:52,075 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:57:52,075 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 14:57:52,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:57:52 BoogieIcfgContainer [2020-09-24 14:57:52,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:57:52,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:57:52,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:57:52,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:57:52,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:57:51" (1/3) ... [2020-09-24 14:57:52,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257e9444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:57:52, skipping insertion in model container [2020-09-24 14:57:52,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:57:51" (2/3) ... [2020-09-24 14:57:52,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257e9444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:57:52, skipping insertion in model container [2020-09-24 14:57:52,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:57:52" (3/3) ... [2020-09-24 14:57:52,096 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-09-24 14:57:52,112 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:57:52,122 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:57:52,149 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:57:52,183 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:57:52,183 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:57:52,184 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:57:52,184 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:57:52,184 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:57:52,184 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:57:52,184 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:57:52,185 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:57:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-24 14:57:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 14:57:52,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:52,219 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -936940309, now seen corresponding path program 1 times [2020-09-24 14:57:52,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880837191] [2020-09-24 14:57:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:52,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880837191] [2020-09-24 14:57:52,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:52,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82653171] [2020-09-24 14:57:52,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:52,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:52,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,454 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-09-24 14:57:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:52,571 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-09-24 14:57:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:52,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-24 14:57:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:52,590 INFO L225 Difference]: With dead ends: 110 [2020-09-24 14:57:52,590 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 14:57:52,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 14:57:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-24 14:57:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-24 14:57:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-09-24 14:57:52,657 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 15 [2020-09-24 14:57:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:52,658 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-09-24 14:57:52,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-09-24 14:57:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 14:57:52,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,660 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:52,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:57:52,661 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1261763386, now seen corresponding path program 1 times [2020-09-24 14:57:52,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207235308] [2020-09-24 14:57:52,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:52,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207235308] [2020-09-24 14:57:52,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:52,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124589632] [2020-09-24 14:57:52,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:52,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:52,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,713 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 3 states. [2020-09-24 14:57:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:52,784 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-09-24 14:57:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:52,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-24 14:57:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:52,787 INFO L225 Difference]: With dead ends: 134 [2020-09-24 14:57:52,787 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:57:52,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:57:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-09-24 14:57:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 14:57:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-09-24 14:57:52,802 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 22 [2020-09-24 14:57:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:52,803 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-09-24 14:57:52,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-09-24 14:57:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 14:57:52,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,805 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 14:57:52,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:57:52,806 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1258903450, now seen corresponding path program 1 times [2020-09-24 14:57:52,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646318080] [2020-09-24 14:57:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 14:57:52,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646318080] [2020-09-24 14:57:52,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:52,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124389439] [2020-09-24 14:57:52,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:52,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:52,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,851 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 3 states. [2020-09-24 14:57:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:52,934 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-09-24 14:57:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:52,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-24 14:57:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:52,937 INFO L225 Difference]: With dead ends: 140 [2020-09-24 14:57:52,937 INFO L226 Difference]: Without dead ends: 105 [2020-09-24 14:57:52,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-24 14:57:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-09-24 14:57:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-24 14:57:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-09-24 14:57:52,953 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 22 [2020-09-24 14:57:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:52,953 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-09-24 14:57:52,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:52,954 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-09-24 14:57:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 14:57:52,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:52,955 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 14:57:52,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:57:52,956 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:52,956 INFO L82 PathProgramCache]: Analyzing trace with hash 122238776, now seen corresponding path program 1 times [2020-09-24 14:57:52,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:52,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031199121] [2020-09-24 14:57:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 14:57:52,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031199121] [2020-09-24 14:57:52,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:52,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:52,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979141329] [2020-09-24 14:57:52,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:52,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:52,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:52,998 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 3 states. [2020-09-24 14:57:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:53,060 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2020-09-24 14:57:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:53,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-24 14:57:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:53,063 INFO L225 Difference]: With dead ends: 200 [2020-09-24 14:57:53,063 INFO L226 Difference]: Without dead ends: 136 [2020-09-24 14:57:53,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-24 14:57:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-09-24 14:57:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 14:57:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2020-09-24 14:57:53,083 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 30 [2020-09-24 14:57:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:53,084 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2020-09-24 14:57:53,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2020-09-24 14:57:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 14:57:53,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:53,086 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 14:57:53,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:57:53,087 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:53,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1207592178, now seen corresponding path program 1 times [2020-09-24 14:57:53,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:53,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023339914] [2020-09-24 14:57:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:53,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 14:57:53,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023339914] [2020-09-24 14:57:53,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:53,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:53,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345557069] [2020-09-24 14:57:53,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:53,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:53,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:53,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,149 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 3 states. [2020-09-24 14:57:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:53,251 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-09-24 14:57:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:53,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-09-24 14:57:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:53,253 INFO L225 Difference]: With dead ends: 248 [2020-09-24 14:57:53,253 INFO L226 Difference]: Without dead ends: 103 [2020-09-24 14:57:53,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-24 14:57:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-09-24 14:57:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-24 14:57:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-09-24 14:57:53,278 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 34 [2020-09-24 14:57:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:53,278 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-09-24 14:57:53,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-09-24 14:57:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 14:57:53,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:57:53,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2020-09-24 14:57:53,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:57:53,283 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:57:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:57:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 340924863, now seen corresponding path program 1 times [2020-09-24 14:57:53,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:57:53,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117456052] [2020-09-24 14:57:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:57:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:57:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:57:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-24 14:57:53,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117456052] [2020-09-24 14:57:53,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:57:53,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 14:57:53,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506294778] [2020-09-24 14:57:53,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 14:57:53,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:57:53,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 14:57:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,416 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 3 states. [2020-09-24 14:57:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:57:53,449 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2020-09-24 14:57:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 14:57:53,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-09-24 14:57:53,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:57:53,455 INFO L225 Difference]: With dead ends: 157 [2020-09-24 14:57:53,455 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 14:57:53,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 14:57:53,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 14:57:53,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 14:57:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 14:57:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 14:57:53,458 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-09-24 14:57:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:57:53,458 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 14:57:53,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 14:57:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 14:57:53,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 14:57:53,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:57:53,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 14:57:53,646 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 14:57:53,646 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:57:53,646 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 14:57:53,646 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 14:57:53,646 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 14:57:53,647 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 14:57:53,647 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-09-24 14:57:53,647 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 140) no Hoare annotation was computed. [2020-09-24 14:57:53,647 INFO L268 CegarLoopResult]: For program point L77-1(lines 53 106) no Hoare annotation was computed. [2020-09-24 14:57:53,647 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-09-24 14:57:53,647 INFO L268 CegarLoopResult]: For program point L69(lines 69 73) no Hoare annotation was computed. [2020-09-24 14:57:53,648 INFO L268 CegarLoopResult]: For program point L61(line 61) no Hoare annotation was computed. [2020-09-24 14:57:53,648 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-09-24 14:57:53,648 INFO L268 CegarLoopResult]: For program point L45(lines 45 110) no Hoare annotation was computed. [2020-09-24 14:57:53,648 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-09-24 14:57:53,648 INFO L271 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2020-09-24 14:57:53,648 INFO L268 CegarLoopResult]: For program point L70(line 70) no Hoare annotation was computed. [2020-09-24 14:57:53,649 INFO L268 CegarLoopResult]: For program point L95(lines 95 97) no Hoare annotation was computed. [2020-09-24 14:57:53,649 INFO L268 CegarLoopResult]: For program point L29(lines 29 124) no Hoare annotation was computed. [2020-09-24 14:57:53,649 INFO L264 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and .cse0 (<= main_~blastFlag~0 2)) (and .cse0 (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))))) [2020-09-24 14:57:53,649 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 140) no Hoare annotation was computed. [2020-09-24 14:57:53,649 INFO L264 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2020-09-24 14:57:53,650 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) no Hoare annotation was computed. [2020-09-24 14:57:53,650 INFO L268 CegarLoopResult]: For program point L63(line 63) no Hoare annotation was computed. [2020-09-24 14:57:53,650 INFO L264 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-24 14:57:53,650 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 140) the Hoare annotation is: true [2020-09-24 14:57:53,650 INFO L268 CegarLoopResult]: For program point L88-1(lines 53 106) no Hoare annotation was computed. [2020-09-24 14:57:53,651 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 14:57:53,651 INFO L268 CegarLoopResult]: For program point L72(line 72) no Hoare annotation was computed. [2020-09-24 14:57:53,651 INFO L268 CegarLoopResult]: For program point L89(line 89) no Hoare annotation was computed. [2020-09-24 14:57:53,651 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 14:57:53,651 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-09-24 14:57:53,651 INFO L268 CegarLoopResult]: For program point L24(lines 24 127) no Hoare annotation was computed. [2020-09-24 14:57:53,652 INFO L268 CegarLoopResult]: For program point L57-1(lines 53 106) no Hoare annotation was computed. [2020-09-24 14:57:53,652 INFO L268 CegarLoopResult]: For program point L49(lines 49 108) no Hoare annotation was computed. [2020-09-24 14:57:53,652 INFO L264 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-24 14:57:53,652 INFO L268 CegarLoopResult]: For program point L58(line 58) no Hoare annotation was computed. [2020-09-24 14:57:53,652 INFO L264 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-24 14:57:53,652 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-09-24 14:57:53,653 INFO L264 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0)) .cse0) (and (<= main_~blastFlag~0 2) .cse0))) [2020-09-24 14:57:53,653 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-09-24 14:57:53,653 INFO L268 CegarLoopResult]: For program point L92-1(lines 53 106) no Hoare annotation was computed. [2020-09-24 14:57:53,653 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 14:57:53,653 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-09-24 14:57:53,654 INFO L268 CegarLoopResult]: For program point L10-1(line 10) no Hoare annotation was computed. [2020-09-24 14:57:53,654 INFO L268 CegarLoopResult]: For program point L10-2(line 10) no Hoare annotation was computed. [2020-09-24 14:57:53,654 INFO L268 CegarLoopResult]: For program point L68(line 68) no Hoare annotation was computed. [2020-09-24 14:57:53,654 INFO L268 CegarLoopResult]: For program point L68-1(line 68) no Hoare annotation was computed. [2020-09-24 14:57:53,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 02:57:53 BoogieIcfgContainer [2020-09-24 14:57:53,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 14:57:53,684 INFO L168 Benchmark]: Toolchain (without parser) took 2483.75 ms. Allocated memory was 149.4 MB in the beginning and 233.3 MB in the end (delta: 83.9 MB). Free memory was 105.5 MB in the beginning and 171.6 MB in the end (delta: -66.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:53,685 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 14:57:53,686 INFO L168 Benchmark]: CACSL2BoogieTranslator took 395.85 ms. Allocated memory is still 149.4 MB. Free memory was 104.9 MB in the beginning and 94.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:53,687 INFO L168 Benchmark]: Boogie Preprocessor took 122.94 ms. Allocated memory was 149.4 MB in the beginning and 203.9 MB in the end (delta: 54.5 MB). Free memory was 94.7 MB in the beginning and 182.0 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:53,688 INFO L168 Benchmark]: RCFGBuilder took 358.70 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 166.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:53,689 INFO L168 Benchmark]: TraceAbstraction took 1595.76 ms. Allocated memory was 203.9 MB in the beginning and 233.3 MB in the end (delta: 29.4 MB). Free memory was 165.6 MB in the beginning and 171.6 MB in the end (delta: -6.0 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-09-24 14:57:53,694 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 149.4 MB. Free memory was 123.9 MB in the beginning and 123.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 395.85 ms. Allocated memory is still 149.4 MB. Free memory was 104.9 MB in the beginning and 94.7 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.94 ms. Allocated memory was 149.4 MB in the beginning and 203.9 MB in the end (delta: 54.5 MB). Free memory was 94.7 MB in the beginning and 182.0 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.70 ms. Allocated memory is still 203.9 MB. Free memory was 182.0 MB in the beginning and 166.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1595.76 ms. Allocated memory was 203.9 MB in the beginning and 233.3 MB in the end (delta: 29.4 MB). Free memory was 165.6 MB in the beginning and 171.6 MB in the end (delta: -6.0 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((blastFlag <= 3 && !(s__hit == 0)) && 8656 <= s__state) || (blastFlag <= 2 && 8656 <= s__state) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (8640 <= s__state && blastFlag <= 2) || ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 295 SDtfs, 129 SDslu, 194 SDs, 0 SdLazy, 106 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=4, 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, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 34 NumberOfFragments, 65 HoareAnnotationTreeSize, 11 FomulaSimplifications, 175 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 173 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 9052 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 42/42 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...