/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/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:42:47,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:42:47,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:42:47,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:42:47,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:42:47,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:42:47,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:42:47,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:42:47,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:42:47,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:42:47,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:42:47,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:42:47,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:42:47,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:42:47,809 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:42:47,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:42:47,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:42:47,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:42:47,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:42:47,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:42:47,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:42:47,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:42:47,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:42:47,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:42:47,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:42:47,851 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 17:42:47,883 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:42:47,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:42:47,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:42:47,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:42:47,885 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:42:47,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:42:47,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:42:47,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:42:47,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:42:47,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:42:47,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:42:47,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:42:47,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:42:47,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:42:47,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:42:47,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:42:47,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:42:47,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:42:47,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:42:47,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:42:47,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:42:47,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:42:47,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:42:47,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:42:47,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:42:47,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:42:47,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:47,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:42:47,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:42:47,890 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 17:42:48,184 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:42:48,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:42:48,207 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:42:48,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:42:48,209 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:42:48,211 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-20 17:42:48,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d94a15abd/e952fcacdaa84b77923eeae15ea81df6/FLAGb17e4fcac [2020-07-20 17:42:48,758 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:42:48,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/terminator_03-1.c [2020-07-20 17:42:48,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d94a15abd/e952fcacdaa84b77923eeae15ea81df6/FLAGb17e4fcac [2020-07-20 17:42:49,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d94a15abd/e952fcacdaa84b77923eeae15ea81df6 [2020-07-20 17:42:49,153 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:42:49,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:42:49,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:42:49,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:42:49,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:42:49,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60bf130a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49, skipping insertion in model container [2020-07-20 17:42:49,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:42:49,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:42:49,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:42:49,395 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:42:49,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:42:49,428 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:42:49,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49 WrapperNode [2020-07-20 17:42:49,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:42:49,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:42:49,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:42:49,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:42:49,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (1/1) ... [2020-07-20 17:42:49,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:42:49,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:42:49,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:42:49,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:42:49,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (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 17:42:49,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:42:49,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:42:49,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:42:49,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:42:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:42:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:42:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:42:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:42:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:42:49,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:42:49,820 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:42:49,821 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:42:49,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:42:49 BoogieIcfgContainer [2020-07-20 17:42:49,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:42:49,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:42:49,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:42:49,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:42:49,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:42:49" (1/3) ... [2020-07-20 17:42:49,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232bc9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:42:49, skipping insertion in model container [2020-07-20 17:42:49,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:42:49" (2/3) ... [2020-07-20 17:42:49,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232bc9ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:42:49, skipping insertion in model container [2020-07-20 17:42:49,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:42:49" (3/3) ... [2020-07-20 17:42:49,834 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2020-07-20 17:42:49,845 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:42:49,853 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:42:49,868 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:42:49,892 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:42:49,893 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:42:49,893 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:42:49,893 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:42:49,893 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:42:49,893 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:42:49,894 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:42:49,894 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:42:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 17:42:49,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 17:42:49,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:49,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:49,922 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-07-20 17:42:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:49,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741606238] [2020-07-20 17:42:49,937 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 17:42:50,027 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:42:50,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:42:50,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 17:42:50,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:42:50,121 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:42:50,155 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 17:42:50,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:42:50,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741606238] [2020-07-20 17:42:50,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:42:50,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:42:50,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300292309] [2020-07-20 17:42:50,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:42:50,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:42:50,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:42:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:42:50,185 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-07-20 17:42:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:42:50,297 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-07-20 17:42:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 17:42:50,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 17:42:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:42:50,309 INFO L225 Difference]: With dead ends: 39 [2020-07-20 17:42:50,309 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 17:42:50,313 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 17:42:50,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 17:42:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 17:42:50,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 17:42:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 17:42:50,353 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 17:42:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:42:50,354 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 17:42:50,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:42:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 17:42:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 17:42:50,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:42:50,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:42:50,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:50,566 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:42:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:42:50,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1117320769, now seen corresponding path program 1 times [2020-07-20 17:42:50,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:42:50,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719529018] [2020-07-20 17:42:50,570 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 17:42:50,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:42:50,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:42:50,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:42:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:42:50,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:42:50,621 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:42:50,621 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:42:50,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:42:50,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:42:50 BoogieIcfgContainer [2020-07-20 17:42:50,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:42:50,860 INFO L168 Benchmark]: Toolchain (without parser) took 1704.28 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 102.6 MB in the beginning and 137.3 MB in the end (delta: -34.7 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:50,861 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 17:42:50,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.94 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 92.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:50,863 INFO L168 Benchmark]: Boogie Preprocessor took 136.83 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.4 MB in the beginning and 182.3 MB in the end (delta: -89.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:50,864 INFO L168 Benchmark]: RCFGBuilder took 256.36 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 170.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:50,865 INFO L168 Benchmark]: TraceAbstraction took 1031.20 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 137.3 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:42:50,870 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 138.4 MB. Free memory is still 121.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.94 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 92.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 136.83 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 92.4 MB in the beginning and 182.3 MB in the end (delta: -89.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.36 ms. Allocated memory is still 203.4 MB. Free memory was 182.3 MB in the beginning and 170.6 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1031.20 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 137.3 MB in the end (delta: 32.4 MB). Peak memory consumption was 32.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x=__VERIFIER_nondet_int(); [L14] int y=__VERIFIER_nondet_int(); [L16] COND TRUE y>0 VAL [x=100, y=1] [L18] COND FALSE !(x<100) VAL [x=100, y=1] [L23] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 7 SDslu, 49 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 21 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 135 SizeOfPredicates, 2 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...