/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/odd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:51:02,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:51:02,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:51:02,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:51:02,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:51:02,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:51:02,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:51:02,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:51:02,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:51:02,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:51:02,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:51:02,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:51:02,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:51:02,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:51:02,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:51:02,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:51:02,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:51:02,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:51:02,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:51:02,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:51:02,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:51:02,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:51:02,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:51:02,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:51:02,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:51:02,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:51:02,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:51:02,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:51:02,801 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 20:51:02,816 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:51:02,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:51:02,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:51:02,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:51:02,821 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:51:02,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:51:02,822 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:51:02,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:51:02,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:51:02,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:51:02,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:51:02,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:51:02,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:51:02,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:51:02,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:51:02,824 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:51:02,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:51:02,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:51:02,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:51:02,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:51:02,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:51:02,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:51:02,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:51:02,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:51:02,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:51:02,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:51:02,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:51:02,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:51:02,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:51:02,826 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 20:51:03,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:51:03,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:51:03,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:51:03,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:51:03,164 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:51:03,165 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/odd.c [2020-07-21 20:51:03,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661f432d2/398057237eff459da2e965f4ccd02e35/FLAGce7f8278c [2020-07-21 20:51:03,739 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:51:03,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/odd.c [2020-07-21 20:51:03,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661f432d2/398057237eff459da2e965f4ccd02e35/FLAGce7f8278c [2020-07-21 20:51:04,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661f432d2/398057237eff459da2e965f4ccd02e35 [2020-07-21 20:51:04,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:51:04,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:51:04,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:51:04,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:51:04,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:51:04,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7e7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04, skipping insertion in model container [2020-07-21 20:51:04,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:51:04,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:51:04,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:51:04,360 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:51:04,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:51:04,386 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:51:04,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04 WrapperNode [2020-07-21 20:51:04,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:51:04,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:51:04,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:51:04,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:51:04,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (1/1) ... [2020-07-21 20:51:04,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:51:04,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:51:04,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:51:04,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:51:04,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (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 20:51:04,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:51:04,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:51:04,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:51:04,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:51:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:51:04,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:51:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:51:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:51:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:51:04,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:51:04,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:51:04,764 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:51:04,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:51:04 BoogieIcfgContainer [2020-07-21 20:51:04,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:51:04,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:51:04,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:51:04,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:51:04,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:51:04" (1/3) ... [2020-07-21 20:51:04,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9c83e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:51:04, skipping insertion in model container [2020-07-21 20:51:04,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:51:04" (2/3) ... [2020-07-21 20:51:04,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9c83e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:51:04, skipping insertion in model container [2020-07-21 20:51:04,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:51:04" (3/3) ... [2020-07-21 20:51:04,775 INFO L109 eAbstractionObserver]: Analyzing ICFG odd.c [2020-07-21 20:51:04,787 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:51:04,795 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:51:04,811 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:51:04,837 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:51:04,837 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:51:04,837 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:51:04,838 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:51:04,838 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:51:04,838 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:51:04,838 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:51:04,838 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:51:04,858 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-21 20:51:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 20:51:04,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:51:04,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:51:04,865 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:51:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:51:04,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2020-07-21 20:51:04,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:51:04,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203516499] [2020-07-21 20:51:04,878 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 20:51:04,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:51:04,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:51:04,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 20:51:04,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:51:05,073 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 20:51:05,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:51:05,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203516499] [2020-07-21 20:51:05,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:51:05,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:51:05,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707170089] [2020-07-21 20:51:05,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:51:05,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:51:05,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:51:05,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:51:05,103 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-21 20:51:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:51:05,202 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-07-21 20:51:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:51:05,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 20:51:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:51:05,212 INFO L225 Difference]: With dead ends: 41 [2020-07-21 20:51:05,213 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 20:51:05,217 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 20:51:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 20:51:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 20:51:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 20:51:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 20:51:05,262 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2020-07-21 20:51:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:51:05,263 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 20:51:05,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:51:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 20:51:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 20:51:05,264 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:51:05,264 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:51:05,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:51:05,471 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:51:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:51:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1109630717, now seen corresponding path program 1 times [2020-07-21 20:51:05,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:51:05,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658291056] [2020-07-21 20:51:05,475 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 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 20:51:05,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:51:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:51:05,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 20:51:05,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:51:05,560 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 20:51:05,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:51:05,750 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 20:51:05,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658291056] [2020-07-21 20:51:05,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 20:51:05,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-07-21 20:51:05,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119417183] [2020-07-21 20:51:05,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:51:05,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:51:05,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:51:05,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:51:05,754 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-07-21 20:51:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:51:05,779 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-07-21 20:51:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:51:05,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 20:51:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:51:05,780 INFO L225 Difference]: With dead ends: 14 [2020-07-21 20:51:05,780 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:51:05,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 20:51:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:51:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:51:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:51:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:51:05,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2020-07-21 20:51:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:51:05,783 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:51:05,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:51:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:51:05,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:51:05,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:51:05,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:51:06,088 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 20:51:06,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:51:06,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:51:06,089 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:51:06,089 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:51:06,089 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:51:06,090 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 16) the Hoare annotation is: true [2020-07-21 20:51:06,090 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 16) no Hoare annotation was computed. [2020-07-21 20:51:06,090 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-07-21 20:51:06,092 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 16) no Hoare annotation was computed. [2020-07-21 20:51:06,093 INFO L268 CegarLoopResult]: For program point L11-1(lines 11 13) no Hoare annotation was computed. [2020-07-21 20:51:06,093 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (not (= 0 (mod main_~x~0 2))) [2020-07-21 20:51:06,094 INFO L264 CegarLoopResult]: At program point L11-4(lines 11 13) the Hoare annotation is: (not (= 0 (mod main_~x~0 2))) [2020-07-21 20:51:06,094 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 20:51:06,094 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:51:06,094 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 20:51:06,094 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 20:51:06,095 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 20:51:06,095 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 20:51:06,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:51:06 BoogieIcfgContainer [2020-07-21 20:51:06,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:51:06,159 INFO L168 Benchmark]: Toolchain (without parser) took 2023.47 ms. Allocated memory was 142.1 MB in the beginning and 198.7 MB in the end (delta: 56.6 MB). Free memory was 100.0 MB in the beginning and 105.4 MB in the end (delta: -5.4 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:51:06,160 INFO L168 Benchmark]: CDTParser took 0.72 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 20:51:06,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.29 ms. Allocated memory is still 142.1 MB. Free memory was 99.6 MB in the beginning and 89.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:51:06,164 INFO L168 Benchmark]: Boogie Preprocessor took 110.06 ms. Allocated memory was 142.1 MB in the beginning and 198.7 MB in the end (delta: 56.6 MB). Free memory was 89.9 MB in the beginning and 177.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:51:06,166 INFO L168 Benchmark]: RCFGBuilder took 270.21 ms. Allocated memory is still 198.7 MB. Free memory was 177.8 MB in the beginning and 166.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:51:06,168 INFO L168 Benchmark]: TraceAbstraction took 1382.29 ms. Allocated memory is still 198.7 MB. Free memory was 165.3 MB in the beginning and 105.4 MB in the end (delta: 59.9 MB). Peak memory consumption was 59.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:51:06,178 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.29 ms. Allocated memory is still 142.1 MB. Free memory was 99.6 MB in the beginning and 89.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.06 ms. Allocated memory was 142.1 MB in the beginning and 198.7 MB in the end (delta: 56.6 MB). Free memory was 89.9 MB in the beginning and 177.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 270.21 ms. Allocated memory is still 198.7 MB. Free memory was 177.8 MB in the beginning and 166.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1382.29 ms. Allocated memory is still 198.7 MB. Free memory was 165.3 MB in the beginning and 105.4 MB in the end (delta: 59.9 MB). Peak memory consumption was 59.9 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 % 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 10 SDslu, 66 SDs, 0 SdLazy, 21 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 12 NumberOfFragments, 17 HoareAnnotationTreeSize, 9 FomulaSimplifications, 11 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 23 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 981 SizeOfPredicates, 4 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 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...