/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:15:27,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:15:27,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:15:27,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:15:27,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:15:27,725 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:15:27,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:15:27,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:15:27,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:15:27,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:15:27,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:15:27,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:15:27,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:15:27,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:15:27,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:15:27,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:15:27,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:15:27,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:15:27,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:15:27,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:15:27,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:15:27,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:15:27,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:15:27,751 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:15:27,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:15:27,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:15:27,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:15:27,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:15:27,764 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 22:15:27,779 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:15:27,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:15:27,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:15:27,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:15:27,781 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:15:27,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:15:27,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:15:27,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:15:27,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:15:27,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:15:27,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:15:27,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:15:27,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:15:27,783 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:15:27,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:15:27,783 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:15:27,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:15:27,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:15:27,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:15:27,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:15:27,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:15:27,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:15:27,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:15:27,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:15:27,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:15:27,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:15:27,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:27,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:15:27,786 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:15:27,786 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 [2020-07-20 22:15:28,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:15:28,118 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:15:28,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:15:28,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:15:28,123 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:15:28,124 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-07-20 22:15:28,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b7a3b89/de571acad0624ef381ba43393ac3d99c/FLAG6de5e9fdc [2020-07-20 22:15:28,726 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:15:28,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2020-07-20 22:15:28,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b7a3b89/de571acad0624ef381ba43393ac3d99c/FLAG6de5e9fdc [2020-07-20 22:15:29,084 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5b7a3b89/de571acad0624ef381ba43393ac3d99c [2020-07-20 22:15:29,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:15:29,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:15:29,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:15:29,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:15:29,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:15:29,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8201e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29, skipping insertion in model container [2020-07-20 22:15:29,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:15:29,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:15:29,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:15:29,333 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:15:29,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:15:29,367 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:15:29,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29 WrapperNode [2020-07-20 22:15:29,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:15:29,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:15:29,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:15:29,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:15:29,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (1/1) ... [2020-07-20 22:15:29,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:15:29,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:15:29,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:15:29,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:15:29,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (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 22:15:29,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:15:29,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:15:29,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:15:29,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:15:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:15:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:15:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 22:15:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:15:29,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:15:29,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:15:29,769 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:15:29,769 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:15:29,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:15:29 BoogieIcfgContainer [2020-07-20 22:15:29,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:15:29,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:15:29,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:15:29,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:15:29,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:15:29" (1/3) ... [2020-07-20 22:15:29,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e23679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:15:29, skipping insertion in model container [2020-07-20 22:15:29,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:15:29" (2/3) ... [2020-07-20 22:15:29,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e23679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:15:29, skipping insertion in model container [2020-07-20 22:15:29,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:15:29" (3/3) ... [2020-07-20 22:15:29,783 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-07-20 22:15:29,795 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:15:29,803 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:15:29,820 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:15:29,848 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:15:29,849 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:15:29,849 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:15:29,849 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:15:29,849 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:15:29,850 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:15:29,850 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:15:29,850 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:15:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 22:15:29,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:15:29,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:29,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:29,896 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:29,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-07-20 22:15:29,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:29,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562962480] [2020-07-20 22:15:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:30,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:15:30,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:15:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:30,091 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 22:15:30,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:15:30,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562962480] [2020-07-20 22:15:30,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:15:30,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:15:30,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738710906] [2020-07-20 22:15:30,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:15:30,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:15:30,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:15:30,114 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 22:15:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:30,229 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-07-20 22:15:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:15:30,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:15:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:30,239 INFO L225 Difference]: With dead ends: 46 [2020-07-20 22:15:30,240 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 22:15:30,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:15:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 22:15:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-20 22:15:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 22:15:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 22:15:30,289 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 22:15:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:30,290 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 22:15:30,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:15:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 22:15:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 22:15:30,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:15:30,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:15:30,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:30,506 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:15:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:15:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2020-07-20 22:15:30,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:15:30,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688790091] [2020-07-20 22:15:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:30,538 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:15:30,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:15:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 22:15:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:15:30,589 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 22:15:30,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:15:30,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:15:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:15:30,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688790091] [2020-07-20 22:15:30,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 22:15:30,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2020-07-20 22:15:30,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491650279] [2020-07-20 22:15:30,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:15:30,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:15:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:15:30,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:15:30,719 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-07-20 22:15:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:15:30,786 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-20 22:15:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:15:30,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-07-20 22:15:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:15:30,787 INFO L225 Difference]: With dead ends: 15 [2020-07-20 22:15:30,788 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:15:30,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:15:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:15:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:15:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:15:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:15:30,790 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-20 22:15:30,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:15:30,791 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:15:30,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:15:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:15:30,791 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:15:30,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:15:30,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:15:31,066 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:15:31,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:15:31,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:15:31,067 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:15:31,067 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:15:31,067 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:15:31,068 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-07-20 22:15:31,068 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 22:15:31,068 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-07-20 22:15:31,068 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-07-20 22:15:31,068 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2020-07-20 22:15:31,069 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 27) the Hoare annotation is: (< (mod main_~len~0 4294967296) 5) [2020-07-20 22:15:31,069 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 27) the Hoare annotation is: (< (mod main_~len~0 4294967296) 5) [2020-07-20 22:15:31,069 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-07-20 22:15:31,069 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 22:15:31,069 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:15:31,070 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 22:15:31,070 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 22:15:31,070 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 22:15:31,070 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 22:15:31,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:15:31 BoogieIcfgContainer [2020-07-20 22:15:31,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:15:31,090 INFO L168 Benchmark]: Toolchain (without parser) took 1988.67 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 99.7 MB in the beginning and 109.2 MB in the end (delta: -9.5 MB). Peak memory consumption was 55.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:31,091 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 22:15:31,092 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.51 ms. Allocated memory is still 135.3 MB. Free memory was 99.3 MB in the beginning and 89.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:31,094 INFO L168 Benchmark]: Boogie Preprocessor took 116.71 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 89.8 MB in the beginning and 178.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:31,095 INFO L168 Benchmark]: RCFGBuilder took 288.32 ms. Allocated memory is still 199.8 MB. Free memory was 178.2 MB in the beginning and 165.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:31,095 INFO L168 Benchmark]: TraceAbstraction took 1311.68 ms. Allocated memory is still 199.8 MB. Free memory was 165.8 MB in the beginning and 109.2 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:15:31,100 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 135.3 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.51 ms. Allocated memory is still 135.3 MB. Free memory was 99.3 MB in the beginning and 89.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.71 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 89.8 MB in the beginning and 178.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.32 ms. Allocated memory is still 199.8 MB. Free memory was 178.2 MB in the beginning and 165.8 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1311.68 ms. Allocated memory is still 199.8 MB. Free memory was 165.8 MB in the beginning and 109.2 MB in the end (delta: 56.6 MB). Peak memory consumption was 56.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 19]: Loop Invariant Derived loop invariant: len % 4294967296 < 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 17 SDslu, 80 SDs, 0 SdLazy, 34 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 17 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 1113 SizeOfPredicates, 4 NumberOfNonLiveVariables, 35 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 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...