/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 BIGGEST_EQUIVALENCE_CLASS --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/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:11:35,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:11:35,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:11:35,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:11:35,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:11:35,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:11:35,824 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:11:35,835 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:11:35,841 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:11:35,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:11:35,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:11:35,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:11:35,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:11:35,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:11:35,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:11:35,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:11:35,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:11:35,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:11:35,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:11:35,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:11:35,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:11:35,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:11:35,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:11:35,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:11:35,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:11:35,876 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 02:11:35,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:11:35,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:11:35,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:11:35,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:11:35,893 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:11:35,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:11:35,894 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:11:35,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:11:35,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:11:35,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:11:35,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:11:35,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:11:35,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:11:35,895 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:11:35,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:11:35,895 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:11:35,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:11:35,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:11:35,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:11:35,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:11:35,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:11:35,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:11:35,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:11:35,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:11:35,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:11:35,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:11:35,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:35,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:11:35,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:11:35,898 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 -> 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 [2020-07-21 02:11:36,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:11:36,220 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:11:36,224 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:11:36,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:11:36,226 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:11:36,229 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2020-07-21 02:11:36,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b25928c52/87595335336e4969b8d874ce6491c8fc/FLAGd6c566674 [2020-07-21 02:11:36,836 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:11:36,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c [2020-07-21 02:11:36,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b25928c52/87595335336e4969b8d874ce6491c8fc/FLAGd6c566674 [2020-07-21 02:11:37,190 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b25928c52/87595335336e4969b8d874ce6491c8fc [2020-07-21 02:11:37,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:11:37,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:11:37,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:11:37,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:11:37,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:11:37,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b006d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37, skipping insertion in model container [2020-07-21 02:11:37,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:11:37,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:11:37,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:11:37,462 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:11:37,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:11:37,492 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:11:37,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37 WrapperNode [2020-07-21 02:11:37,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:11:37,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:11:37,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:11:37,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:11:37,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (1/1) ... [2020-07-21 02:11:37,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:11:37,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:11:37,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:11:37,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:11:37,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (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 02:11:37,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:11:37,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:11:37,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 02:11:37,658 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:11:37,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:11:37,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 02:11:37,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 02:11:37,659 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:11:37,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:11:37,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:11:37,837 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:11:37,838 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 02:11:37,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:11:37 BoogieIcfgContainer [2020-07-21 02:11:37,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:11:37,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:11:37,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:11:37,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:11:37,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:11:37" (1/3) ... [2020-07-21 02:11:37,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405cf20e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:11:37, skipping insertion in model container [2020-07-21 02:11:37,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:37" (2/3) ... [2020-07-21 02:11:37,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405cf20e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:11:37, skipping insertion in model container [2020-07-21 02:11:37,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:11:37" (3/3) ... [2020-07-21 02:11:37,852 INFO L109 eAbstractionObserver]: Analyzing ICFG mod4.c [2020-07-21 02:11:37,864 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:11:37,872 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:11:37,887 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:11:37,911 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:11:37,911 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:11:37,911 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:11:37,911 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:11:37,911 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:11:37,912 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:11:37,912 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:11:37,912 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:11:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 02:11:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 02:11:37,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:37,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:37,939 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:37,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2020-07-21 02:11:37,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:37,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385702541] [2020-07-21 02:11:37,953 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 [2020-07-21 02:11:38,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:11:38,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 02:11:38,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:38,078 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 02:11:38,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:11:38,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385702541] [2020-07-21 02:11:38,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:11:38,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 02:11:38,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563276570] [2020-07-21 02:11:38,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 02:11:38,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 02:11:38,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 02:11:38,126 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-07-21 02:11:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:11:38,147 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-07-21 02:11:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 02:11:38,148 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 02:11:38,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:11:38,156 INFO L225 Difference]: With dead ends: 31 [2020-07-21 02:11:38,156 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 02:11:38,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 02:11:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 02:11:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 02:11:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 02:11:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 02:11:38,197 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 02:11:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:11:38,198 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 02:11:38,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 02:11:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 02:11:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 02:11:38,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:38,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:38,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:38,415 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:38,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1890620952, now seen corresponding path program 1 times [2020-07-21 02:11:38,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:38,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092694788] [2020-07-21 02:11:38,418 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 [2020-07-21 02:11:38,457 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:11:38,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:38,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:11:38,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:38,528 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 02:11:38,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:11:38,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092694788] [2020-07-21 02:11:38,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:11:38,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:11:38,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831770838] [2020-07-21 02:11:38,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:11:38,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:38,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:11:38,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:11:38,534 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2020-07-21 02:11:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:11:38,588 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-21 02:11:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:11:38,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 02:11:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:11:38,590 INFO L225 Difference]: With dead ends: 19 [2020-07-21 02:11:38,590 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 02:11:38,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 02:11:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 02:11:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 02:11:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 02:11:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 02:11:38,597 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2020-07-21 02:11:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:11:38,598 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 02:11:38,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:11:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 02:11:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 02:11:38,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:38,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:38,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:38,815 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:38,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1109630717, now seen corresponding path program 1 times [2020-07-21 02:11:38,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:38,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712542640] [2020-07-21 02:11:38,818 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:38,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:11:38,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:38,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:11:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:11:38,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:11:38,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:38,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:38,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 02:11:39,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712542640] [2020-07-21 02:11:39,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 02:11:39,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-07-21 02:11:39,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125055182] [2020-07-21 02:11:39,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:11:39,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:39,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:11:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:11:39,008 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-07-21 02:11:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:11:39,030 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-07-21 02:11:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:11:39,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 02:11:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:11:39,031 INFO L225 Difference]: With dead ends: 14 [2020-07-21 02:11:39,031 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 02:11:39,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:11:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 02:11:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 02:11:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 02:11:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 02:11:39,033 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-21 02:11:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:11:39,034 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 02:11:39,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:11:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 02:11:39,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 02:11:39,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:39,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 02:11:39,318 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 02:11:39,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:11:39,318 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:11:39,319 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 02:11:39,319 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 02:11:39,319 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 02:11:39,319 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 16) the Hoare annotation is: true [2020-07-21 02:11:39,319 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 16) no Hoare annotation was computed. [2020-07-21 02:11:39,320 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-07-21 02:11:39,320 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 16) no Hoare annotation was computed. [2020-07-21 02:11:39,320 INFO L268 CegarLoopResult]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2020-07-21 02:11:39,320 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (= 0 (mod main_~x~0 4)) [2020-07-21 02:11:39,320 INFO L264 CegarLoopResult]: At program point L11-4(lines 11 13) the Hoare annotation is: (= 0 (mod main_~x~0 4)) [2020-07-21 02:11:39,320 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 02:11:39,321 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 02:11:39,321 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 02:11:39,321 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 02:11:39,321 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 02:11:39,321 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 02:11:39,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:11:39 BoogieIcfgContainer [2020-07-21 02:11:39,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 02:11:39,341 INFO L168 Benchmark]: Toolchain (without parser) took 2136.35 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 100.8 MB in the beginning and 111.0 MB in the end (delta: -10.2 MB). Peak memory consumption was 53.7 MB. Max. memory is 7.1 GB. [2020-07-21 02:11:39,342 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 02:11:39,343 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.75 ms. Allocated memory is still 136.3 MB. Free memory was 100.6 MB in the beginning and 91.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 02:11:39,344 INFO L168 Benchmark]: Boogie Preprocessor took 105.15 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 179.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 02:11:39,345 INFO L168 Benchmark]: RCFGBuilder took 241.38 ms. Allocated memory is still 200.3 MB. Free memory was 179.5 MB in the beginning and 167.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-07-21 02:11:39,346 INFO L168 Benchmark]: TraceAbstraction took 1494.75 ms. Allocated memory is still 200.3 MB. Free memory was 167.1 MB in the beginning and 111.0 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2020-07-21 02:11:39,351 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.75 ms. Allocated memory is still 136.3 MB. Free memory was 100.6 MB in the beginning and 91.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.15 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 179.5 MB in the end (delta: -88.3 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.38 ms. Allocated memory is still 200.3 MB. Free memory was 179.5 MB in the beginning and 167.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1494.75 ms. Allocated memory is still 200.3 MB. Free memory was 167.1 MB in the beginning and 111.0 MB in the end (delta: 56.1 MB). Peak memory consumption was 56.1 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: 11]: Loop Invariant Derived loop invariant: 0 == x % 4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 2 SDslu, 47 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 12 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 10 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 34 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 1025 SizeOfPredicates, 4 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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...