/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 NUM_VARIABLES --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/trex03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:43:09,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:43:09,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:43:09,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:43:09,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:43:09,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:43:09,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:43:09,845 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:43:09,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:43:09,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:43:09,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:43:09,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:43:09,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:43:09,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:43:09,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:43:09,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:43:09,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:43:09,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:43:09,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:43:09,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:43:09,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:43:09,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:43:09,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:43:09,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:43:09,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:43:09,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:43:09,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:43:09,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:43:09,879 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 17:43:09,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:43:09,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:43:09,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:43:09,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:43:09,896 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:43:09,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:43:09,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:43:09,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:43:09,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:43:09,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:43:09,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:43:09,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:43:09,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:43:09,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:43:09,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:43:09,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:43:09,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:43:09,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:43:09,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:43:09,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:43:09,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:43:09,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:43:09,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:43:09,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:43:09,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:43:09,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:43:09,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:43:09,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:43:09,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:43:09,902 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 -> NUM_VARIABLES 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 17:43:10,194 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:43:10,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:43:10,223 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:43:10,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:43:10,225 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:43:10,226 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex03-2.c [2020-07-20 17:43:10,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b3d6ee9/423e1fedb8cd414394eb62a19b751c05/FLAG296fb58f2 [2020-07-20 17:43:10,839 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:43:10,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex03-2.c [2020-07-20 17:43:10,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b3d6ee9/423e1fedb8cd414394eb62a19b751c05/FLAG296fb58f2 [2020-07-20 17:43:11,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b3d6ee9/423e1fedb8cd414394eb62a19b751c05 [2020-07-20 17:43:11,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:43:11,208 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:43:11,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:43:11,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:43:11,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:43:11,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6bf434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11, skipping insertion in model container [2020-07-20 17:43:11,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:43:11,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:43:11,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:43:11,434 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:43:11,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:43:11,466 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:43:11,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11 WrapperNode [2020-07-20 17:43:11,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:43:11,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:43:11,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:43:11,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:43:11,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ... [2020-07-20 17:43:11,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:43:11,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:43:11,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:43:11,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:43:11,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (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 17:43:11,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:43:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:43:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:43:11,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:43:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:43:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:43:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 17:43:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 17:43:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:43:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:43:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:43:11,879 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:43:11,880 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:43:11,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:11 BoogieIcfgContainer [2020-07-20 17:43:11,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:43:11,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:43:11,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:43:11,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:43:11,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:43:11" (1/3) ... [2020-07-20 17:43:11,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6e3dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:11, skipping insertion in model container [2020-07-20 17:43:11,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (2/3) ... [2020-07-20 17:43:11,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6e3dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:11, skipping insertion in model container [2020-07-20 17:43:11,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:11" (3/3) ... [2020-07-20 17:43:11,892 INFO L109 eAbstractionObserver]: Analyzing ICFG trex03-2.c [2020-07-20 17:43:11,904 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:43:11,911 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:43:11,926 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:43:11,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:43:11,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:43:11,950 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:43:11,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:43:11,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:43:11,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:43:11,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:43:11,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:43:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 17:43:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:43:11,974 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:43:11,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:43:11,975 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:43:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:43:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -859010367, now seen corresponding path program 1 times [2020-07-20 17:43:11,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:43:11,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760878761] [2020-07-20 17:43:11,989 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 17:43:12,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:43:12,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:43:12,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:43:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:43:12,120 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 17:43:12,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:43:12,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760878761] [2020-07-20 17:43:12,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:43:12,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:43:12,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723281091] [2020-07-20 17:43:12,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:43:12,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:43:12,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:43:12,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:43:12,153 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 17:43:12,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:43:12,178 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-20 17:43:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:43:12,180 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 17:43:12,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:43:12,189 INFO L225 Difference]: With dead ends: 33 [2020-07-20 17:43:12,189 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 17:43:12,193 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 [2020-07-20 17:43:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 17:43:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 17:43:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 17:43:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-20 17:43:12,234 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-20 17:43:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:43:12,235 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-20 17:43:12,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:43:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-20 17:43:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:43:12,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:43:12,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:43:12,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:43:12,450 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:43:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:43:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2020-07-20 17:43:12,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:43:12,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756620888] [2020-07-20 17:43:12,453 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 17:43:12,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:43:12,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:43:12,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:43:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:43:12,555 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:43:12,568 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 17:43:12,577 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 17:43:12,585 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 17:43:12,671 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 17:43:12,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:43:12,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756620888] [2020-07-20 17:43:12,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:43:12,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:43:12,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190320429] [2020-07-20 17:43:12,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:43:12,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:43:12,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:43:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:43:12,676 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-07-20 17:43:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:43:12,717 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-07-20 17:43:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:43:12,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 17:43:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:43:12,719 INFO L225 Difference]: With dead ends: 14 [2020-07-20 17:43:12,719 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:43:12,720 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 17:43:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:43:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:43:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:43:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:43:12,722 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-07-20 17:43:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:43:12,722 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:43:12,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:43:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:43:12,723 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:43:12,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:43:12,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:43:13,006 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:43:13,006 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:43:13,006 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:43:13,006 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:43:13,006 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:43:13,007 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:43:13,007 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-20 17:43:13,007 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 29) no Hoare annotation was computed. [2020-07-20 17:43:13,007 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-07-20 17:43:13,007 INFO L268 CegarLoopResult]: For program point L21-2(lines 20 22) no Hoare annotation was computed. [2020-07-20 17:43:13,007 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 29) no Hoare annotation was computed. [2020-07-20 17:43:13,008 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 29) the Hoare annotation is: true [2020-07-20 17:43:13,008 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-07-20 17:43:13,008 INFO L271 CegarLoopResult]: At program point L18-2(lines 18 25) the Hoare annotation is: true [2020-07-20 17:43:13,010 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 25) the Hoare annotation is: (or (<= (mod main_~x1~0 4294967296) 0) (<= (mod main_~x2~0 4294967296) 0) (<= (mod main_~x3~0 4294967296) 0)) [2020-07-20 17:43:13,010 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 17:43:13,010 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 17:43:13,017 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 17:43:13,017 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 17:43:13,017 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 17:43:13,017 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 17:43:13,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:43:13 BoogieIcfgContainer [2020-07-20 17:43:13,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:43:13,040 INFO L168 Benchmark]: Toolchain (without parser) took 1831.59 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 101.6 MB in the beginning and 121.9 MB in the end (delta: -20.2 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:13,041 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:43:13,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.80 ms. Allocated memory is still 136.8 MB. Free memory was 101.2 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:13,046 INFO L168 Benchmark]: Boogie Preprocessor took 125.95 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 179.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:13,047 INFO L168 Benchmark]: RCFGBuilder took 288.30 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:13,049 INFO L168 Benchmark]: TraceAbstraction took 1150.76 ms. Allocated memory is still 200.8 MB. Free memory was 166.4 MB in the beginning and 121.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:43:13,060 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.80 ms. Allocated memory is still 136.8 MB. Free memory was 101.2 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.95 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 179.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.30 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1150.76 ms. Allocated memory is still 200.8 MB. Free memory was 166.4 MB in the beginning and 121.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 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: 18]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 1 SDslu, 32 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 333 SizeOfPredicates, 2 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...