/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.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:10:33,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:10:33,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:10:33,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:10:33,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:10:33,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:10:33,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:10:33,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:10:33,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:10:33,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:10:33,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:10:33,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:10:33,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:10:33,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:10:33,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:10:33,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:10:33,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:10:33,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:10:33,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:10:33,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:10:33,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:10:33,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:10:33,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:10:33,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:10:33,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:10:33,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:10:33,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:10:33,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:10:33,657 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 [2020-07-20 06:10:33,690 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:10:33,690 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:10:33,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:10:33,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:10:33,696 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:10:33,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:10:33,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:10:33,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:10:33,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:10:33,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:10:33,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:10:33,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:10:33,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:10:33,700 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:10:33,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:10:33,700 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:10:33,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:10:33,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:10:33,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:10:33,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:10:33,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:10:33,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:10:33,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:10:33,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:10:33,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:10:33,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:10:33,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:10:33,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:10:33,704 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:10:33,704 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:10:34,089 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:10:34,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:10:34,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:10:34,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:10:34,118 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:10:34,119 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-20 06:10:34,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ae280b8/33f4e577cbf44f11bb0d76c3aef103b1/FLAGbddf47ead [2020-07-20 06:10:34,745 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:10:34,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-20 06:10:34,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ae280b8/33f4e577cbf44f11bb0d76c3aef103b1/FLAGbddf47ead [2020-07-20 06:10:35,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ae280b8/33f4e577cbf44f11bb0d76c3aef103b1 [2020-07-20 06:10:35,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:10:35,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:10:35,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:35,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:10:35,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:10:35,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a83dda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35, skipping insertion in model container [2020-07-20 06:10:35,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:10:35,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:10:35,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:35,408 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:10:35,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:35,452 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:10:35,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35 WrapperNode [2020-07-20 06:10:35,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:35,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:10:35,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:10:35,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:10:35,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (1/1) ... [2020-07-20 06:10:35,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:10:35,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:10:35,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:10:35,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:10:35,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (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 [2020-07-20 06:10:35,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:10:35,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:10:35,732 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:10:35,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:10:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:10:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:10:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:10:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:10:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:10:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:10:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:10:35,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:10:35,991 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:10:35,992 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 06:10:36,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:36 BoogieIcfgContainer [2020-07-20 06:10:36,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:10:36,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:10:36,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:10:36,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:10:36,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:10:35" (1/3) ... [2020-07-20 06:10:36,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5e1ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:36, skipping insertion in model container [2020-07-20 06:10:36,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:35" (2/3) ... [2020-07-20 06:10:36,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5e1ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:36, skipping insertion in model container [2020-07-20 06:10:36,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:36" (3/3) ... [2020-07-20 06:10:36,035 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2020-07-20 06:10:36,051 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:10:36,062 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:10:36,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:10:36,115 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:10:36,116 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:10:36,116 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:10:36,116 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:10:36,116 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:10:36,117 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:10:36,117 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:10:36,117 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:10:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-07-20 06:10:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 06:10:36,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:36,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:36,163 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1330899215, now seen corresponding path program 1 times [2020-07-20 06:10:36,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:36,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338129802] [2020-07-20 06:10:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ce82290 [2020-07-20 06:10:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:36,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338129802] [2020-07-20 06:10:36,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:10:36,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:10:36,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837504516] [2020-07-20 06:10:36,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:10:36,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:36,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:10:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:10:36,446 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-07-20 06:10:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:36,550 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-20 06:10:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:10:36,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-20 06:10:36,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:36,563 INFO L225 Difference]: With dead ends: 26 [2020-07-20 06:10:36,564 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 06:10:36,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:10:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 06:10:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 06:10:36,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 06:10:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 06:10:36,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 06:10:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:36,616 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 06:10:36,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:10:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 06:10:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 06:10:36,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:36,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:36,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:10:36,619 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:36,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1691859760, now seen corresponding path program 1 times [2020-07-20 06:10:36,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:36,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525023648] [2020-07-20 06:10:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ce82290 [2020-07-20 06:10:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:36,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525023648] [2020-07-20 06:10:36,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653305807] [2020-07-20 06:10:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e3b5c5e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:36,792 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6e3b5c5e issued 4 check-sat command(s) [2020-07-20 06:10:36,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:10:36,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:36,846 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:36,851 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:36,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:36,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 06:10:36,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126513920] [2020-07-20 06:10:36,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:10:36,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:10:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:10:36,887 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-07-20 06:10:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:36,990 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-07-20 06:10:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:10:36,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-20 06:10:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:36,992 INFO L225 Difference]: With dead ends: 17 [2020-07-20 06:10:36,992 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 06:10:36,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:10:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 06:10:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 06:10:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 06:10:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 06:10:37,000 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 06:10:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:37,001 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 06:10:37,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:10:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 06:10:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 06:10:37,002 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:37,002 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:37,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:10:37,204 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash -908107473, now seen corresponding path program 2 times [2020-07-20 06:10:37,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:37,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023384484] [2020-07-20 06:10:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ce82290 [2020-07-20 06:10:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:37,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023384484] [2020-07-20 06:10:37,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740447463] [2020-07-20 06:10:37,356 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cf13b99 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 [2020-07-20 06:10:37,399 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7cf13b99 issued 3 check-sat command(s) [2020-07-20 06:10:37,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:37,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:10:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:37,431 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:37,434 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:37,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:37,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 06:10:37,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252547274] [2020-07-20 06:10:37,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:10:37,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:37,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:10:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:10:37,466 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-07-20 06:10:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:37,634 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-07-20 06:10:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:10:37,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-07-20 06:10:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:37,636 INFO L225 Difference]: With dead ends: 18 [2020-07-20 06:10:37,636 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 06:10:37,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:10:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 06:10:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 06:10:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:10:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 06:10:37,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-07-20 06:10:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:37,643 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 06:10:37,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:10:37,644 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 06:10:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 06:10:37,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:37,645 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:37,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:37,861 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1913376944, now seen corresponding path program 3 times [2020-07-20 06:10:37,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:37,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159970509] [2020-07-20 06:10:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ce82290 [2020-07-20 06:10:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:37,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159970509] [2020-07-20 06:10:37,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604098639] [2020-07-20 06:10:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@383ca0c7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:38,007 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@383ca0c7 issued 4 check-sat command(s) [2020-07-20 06:10:38,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 06:10:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:40,612 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:40,615 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:40,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:40,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-07-20 06:10:40,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991824427] [2020-07-20 06:10:40,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 06:10:40,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 06:10:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=106, Unknown=2, NotChecked=0, Total=132 [2020-07-20 06:10:40,678 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-20 06:10:46,127 WARN L193 SmtUtils]: Spent 5.14 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-07-20 06:10:48,271 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-07-20 06:10:52,407 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-07-20 06:10:54,525 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-07-20 06:10:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:54,528 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-07-20 06:10:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:10:54,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-20 06:10:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:54,531 INFO L225 Difference]: With dead ends: 17 [2020-07-20 06:10:54,531 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 06:10:54,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=74, Invalid=266, Unknown=2, NotChecked=0, Total=342 [2020-07-20 06:10:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 06:10:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 06:10:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 06:10:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 06:10:54,533 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-20 06:10:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:54,533 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 06:10:54,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 06:10:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 06:10:54,533 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 06:10:54,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:54,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 06:10:54,851 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 06:10:54,852 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_65~0 |old(~__return_65~0)|)) [2020-07-20 06:10:54,852 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 06:10:54,852 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 06:10:54,852 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 06:10:54,852 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 06:10:54,853 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 06:10:54,853 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 06:10:54,853 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 06:10:54,853 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 06:10:54,853 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 06:10:54,853 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-07-20 06:10:54,854 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_65~0)| ~__return_65~0) [2020-07-20 06:10:54,854 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-07-20 06:10:54,854 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-07-20 06:10:54,854 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-07-20 06:10:54,854 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-20 06:10:54,854 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-07-20 06:10:54,854 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-20 06:10:54,855 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse0 (= |old(~__return_65~0)| ~__return_65~0))) (or (and (<= (+ main_~main__x~0 50) 0) .cse0) (and (exists ((v_main_~main__x~0_12 Int)) (and (<= (+ (div (+ (* v_main_~main__x~0_12 (- 1)) (- 2)) (- 2)) 2) main_~main__y~0) (<= (+ main_~main__x~0 1) (+ main_~main__y~0 v_main_~main__x~0_12)))) (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0))) [2020-07-20 06:10:54,865 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:54,866 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:54,873 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:54,874 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:54,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:10:54 BoogieIcfgContainer [2020-07-20 06:10:54,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:10:54,879 INFO L168 Benchmark]: Toolchain (without parser) took 19791.42 ms. Allocated memory was 143.1 MB in the beginning and 236.5 MB in the end (delta: 93.3 MB). Free memory was 103.5 MB in the beginning and 133.6 MB in the end (delta: -30.1 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:54,880 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 143.1 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-20 06:10:54,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.35 ms. Allocated memory is still 143.1 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:54,882 INFO L168 Benchmark]: Boogie Preprocessor took 198.30 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 93.6 MB in the beginning and 183.3 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:54,883 INFO L168 Benchmark]: RCFGBuilder took 354.62 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 170.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:54,884 INFO L168 Benchmark]: TraceAbstraction took 18865.79 ms. Allocated memory was 204.5 MB in the beginning and 236.5 MB in the end (delta: 32.0 MB). Free memory was 170.0 MB in the beginning and 133.6 MB in the end (delta: 36.4 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:54,889 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 143.1 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 364.35 ms. Allocated memory is still 143.1 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 198.30 ms. Allocated memory was 143.1 MB in the beginning and 204.5 MB in the end (delta: 61.3 MB). Free memory was 93.6 MB in the beginning and 183.3 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.62 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 170.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18865.79 ms. Allocated memory was 204.5 MB in the beginning and 236.5 MB in the end (delta: 32.0 MB). Free memory was 170.0 MB in the beginning and 133.6 MB in the end (delta: 36.4 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: 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: 28]: Loop Invariant [2020-07-20 06:10:54,906 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:54,906 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:54,907 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:54,907 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] Derived loop invariant: (main__x + 50 <= 0 && \old(__return_65) == __return_65) || (((\exists v_main_~main__x~0_12 : int :: (v_main_~main__x~0_12 * -1 + -2) / -2 + 2 <= main__y && main__x + 1 <= main__y + v_main_~main__x~0_12) && main__x + 2 <= main__y) && \old(__return_65) == __return_65) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 14.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 43 SDslu, 97 SDs, 0 SdLazy, 130 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 16.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 9 NumberOfFragments, 51 HoareAnnotationTreeSize, 5 FomulaSimplifications, 45 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 41 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 89 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 82 ConstructedInterpolants, 1 QuantifiedInterpolants, 3217 SizeOfPredicates, 12 NumberOfNonLiveVariables, 155 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 3/20 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...