/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:50:54,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:50:54,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:50:54,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:50:54,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:50:54,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:50:54,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:50:54,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:50:54,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:50:54,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:50:54,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:50:54,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:50:54,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:50:54,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:50:54,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:50:54,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:50:54,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:50:54,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:50:54,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:50:54,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:50:54,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:50:54,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:50:54,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:50:54,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:50:54,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:50:54,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:50:54,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:50:54,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:50:54,721 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 [2020-07-21 20:50:54,758 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:50:54,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:50:54,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:50:54,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:50:54,762 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:50:54,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:50:54,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:50:54,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:50:54,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:50:54,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:50:54,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:50:54,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:50:54,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:50:54,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:50:54,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:50:54,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:50:54,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:50:54,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:50:54,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:50:54,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:50:54,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:50:54,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:50:54,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:50:54,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:50:54,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:50:54,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:50:54,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:54,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:50:54,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:50:54,772 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 -> 2 [2020-07-21 20:50:55,090 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:50:55,105 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:50:55,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:50:55,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:50:55,114 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:50:55,116 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq2.c [2020-07-21 20:50:55,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3abba6f4/67aee58edcc7454c97dc7dd906c9ed61/FLAG71c60c1dc [2020-07-21 20:50:55,657 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:50:55,658 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq2.c [2020-07-21 20:50:55,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3abba6f4/67aee58edcc7454c97dc7dd906c9ed61/FLAG71c60c1dc [2020-07-21 20:50:56,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3abba6f4/67aee58edcc7454c97dc7dd906c9ed61 [2020-07-21 20:50:56,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:50:56,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:50:56,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:50:56,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:50:56,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:50:56,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccd7fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56, skipping insertion in model container [2020-07-21 20:50:56,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:50:56,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:50:56,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:50:56,261 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:50:56,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:50:56,294 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:50:56,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56 WrapperNode [2020-07-21 20:50:56,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:50:56,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:50:56,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:50:56,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:50:56,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (1/1) ... [2020-07-21 20:50:56,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:50:56,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:50:56,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:50:56,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:50:56,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (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 [2020-07-21 20:50:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:50:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:50:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:50:56,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:50:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:50:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 20:50:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:50:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:50:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:50:56,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:50:56,695 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:50:56,695 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:50:56,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:56 BoogieIcfgContainer [2020-07-21 20:50:56,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:50:56,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:50:56,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:50:56,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:50:56,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:56" (1/3) ... [2020-07-21 20:50:56,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:56, skipping insertion in model container [2020-07-21 20:50:56,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:56" (2/3) ... [2020-07-21 20:50:56,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d6c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:56, skipping insertion in model container [2020-07-21 20:50:56,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:56" (3/3) ... [2020-07-21 20:50:56,708 INFO L109 eAbstractionObserver]: Analyzing ICFG eq2.c [2020-07-21 20:50:56,719 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:50:56,727 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:50:56,742 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:50:56,767 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:50:56,767 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:50:56,768 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:50:56,768 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:50:56,768 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:50:56,768 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:50:56,768 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:50:56,768 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:50:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-21 20:50:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:50:56,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:56,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:56,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:56,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:56,799 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2020-07-21 20:50:56,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:56,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698883062] [2020-07-21 20:50:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 20:50:56,885 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:50:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:56,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 20:50:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:57,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:50:57,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698883062] [2020-07-21 20:50:57,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:50:57,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:50:57,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911234302] [2020-07-21 20:50:57,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:50:57,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:50:57,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:50:57,037 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-07-21 20:50:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:50:57,109 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-07-21 20:50:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:50:57,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 20:50:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:50:57,118 INFO L225 Difference]: With dead ends: 28 [2020-07-21 20:50:57,118 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:50:57,121 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 [2020-07-21 20:50:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:50:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:50:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:50:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:50:57,144 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-07-21 20:50:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:50:57,144 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:50:57,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:50:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:50:57,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:50:57,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:57,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:50:57,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 20:50:57,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:50:57,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:50:57,405 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:50:57,405 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:50:57,405 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:50:57,405 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 20) the Hoare annotation is: true [2020-07-21 20:50:57,406 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 20) no Hoare annotation was computed. [2020-07-21 20:50:57,406 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 20:50:57,406 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 20) no Hoare annotation was computed. [2020-07-21 20:50:57,406 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (= main_~z~0 main_~y~0) [2020-07-21 20:50:57,407 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (= main_~z~0 main_~y~0) [2020-07-21 20:50:57,407 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 20:50:57,407 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:50:57,407 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 20:50:57,408 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 20:50:57,408 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 20:50:57,408 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:50:57,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:50:57 BoogieIcfgContainer [2020-07-21 20:50:57,423 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:50:57,427 INFO L168 Benchmark]: Toolchain (without parser) took 1368.46 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 104.8 MB in the beginning and 141.0 MB in the end (delta: -36.2 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:50:57,428 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 20:50:57,429 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.20 ms. Allocated memory is still 146.8 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:50:57,431 INFO L168 Benchmark]: Boogie Preprocessor took 132.67 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 95.1 MB in the beginning and 184.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:50:57,432 INFO L168 Benchmark]: RCFGBuilder took 270.20 ms. Allocated memory is still 204.5 MB. Free memory was 184.6 MB in the beginning and 171.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:50:57,433 INFO L168 Benchmark]: TraceAbstraction took 722.87 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 141.0 MB in the end (delta: 30.6 MB). Peak memory consumption was 30.6 MB. Max. memory is 7.1 GB. [2020-07-21 20:50:57,439 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.20 ms. Allocated memory is still 146.8 MB. Free memory was 104.4 MB in the beginning and 95.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.67 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 95.1 MB in the beginning and 184.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 270.20 ms. Allocated memory is still 204.5 MB. Free memory was 184.6 MB in the beginning and 171.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 722.87 ms. Allocated memory is still 204.5 MB. Free memory was 171.5 MB in the beginning and 141.0 MB in the end (delta: 30.6 MB). Peak memory consumption was 30.6 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: 14]: Loop Invariant Derived loop invariant: z == y - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 7 SDslu, 29 SDs, 0 SdLazy, 10 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 11 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 10 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 153 SizeOfPredicates, 4 NumberOfNonLiveVariables, 20 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...