/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:41:51,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:41:51,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:41:51,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 01:41:51,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:41:51,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:41:51,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:41:51,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:41:51,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:41:51,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:41:51,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:41:51,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:41:51,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:41:51,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:41:51,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:41:51,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:41:51,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:41:51,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:41:51,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:41:51,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:41:51,960 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 01:41:51,977 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:41:51,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:41:51,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:41:51,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:41:51,979 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:41:51,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:41:51,980 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:41:51,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:41:51,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:41:51,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:41:51,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:41:51,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:41:51,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:41:51,981 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:41:51,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:41:51,982 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:41:51,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:41:51,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:41:51,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:41:51,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:41:51,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:41:51,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:41:51,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:41:51,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:41:51,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:41:51,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:41:51,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:51,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:41:51,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:41:51,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:41:52,336 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:41:52,353 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:41:52,358 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:41:52,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:41:52,360 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:41:52,361 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-21 01:41:52,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0120d5ea4/bf998fff23ae4ca5b7141686e142850a/FLAGbaa2b3a66 [2020-07-21 01:41:53,005 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:41:53,006 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-21 01:41:53,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0120d5ea4/bf998fff23ae4ca5b7141686e142850a/FLAGbaa2b3a66 [2020-07-21 01:41:53,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0120d5ea4/bf998fff23ae4ca5b7141686e142850a [2020-07-21 01:41:53,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:41:53,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:41:53,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:41:53,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:41:53,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:41:53,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b3d08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53, skipping insertion in model container [2020-07-21 01:41:53,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:41:53,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:41:53,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:41:53,584 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:41:53,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:41:53,622 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:41:53,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53 WrapperNode [2020-07-21 01:41:53,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:41:53,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:41:53,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:41:53,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:41:53,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (1/1) ... [2020-07-21 01:41:53,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:41:53,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:41:53,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:41:53,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:41:53,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (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 01:41:53,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:41:53,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:41:53,846 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:41:53,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:41:53,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:41:53,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:41:53,847 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:41:53,848 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:41:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:41:53,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:41:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:41:53,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:41:53,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:41:54,089 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:41:54,090 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 01:41:54,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:41:54 BoogieIcfgContainer [2020-07-21 01:41:54,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:41:54,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:41:54,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:41:54,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:41:54,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:41:53" (1/3) ... [2020-07-21 01:41:54,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dddc319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:41:54, skipping insertion in model container [2020-07-21 01:41:54,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:41:53" (2/3) ... [2020-07-21 01:41:54,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dddc319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:41:54, skipping insertion in model container [2020-07-21 01:41:54,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:41:54" (3/3) ... [2020-07-21 01:41:54,108 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-07-21 01:41:54,123 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:41:54,133 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:41:54,161 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:41:54,203 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:41:54,204 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:41:54,204 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:41:54,204 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:41:54,205 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:41:54,205 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:41:54,205 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:41:54,206 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:41:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 01:41:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:41:54,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:54,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:41:54,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:54,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1474053726, now seen corresponding path program 1 times [2020-07-21 01:41:54,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:54,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76543373] [2020-07-21 01:41:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:54,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:41:54,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:54,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:41:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:54,394 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 01:41:54,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:41:54,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76543373] [2020-07-21 01:41:54,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:41:54,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:41:54,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8765109] [2020-07-21 01:41:54,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:41:54,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:54,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:41:54,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:41:54,426 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-07-21 01:41:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:54,461 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-07-21 01:41:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:41:54,464 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 01:41:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:54,486 INFO L225 Difference]: With dead ends: 40 [2020-07-21 01:41:54,486 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 01:41:54,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:41:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 01:41:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 01:41:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 01:41:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-21 01:41:54,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2020-07-21 01:41:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:54,549 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-21 01:41:54,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:41:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-21 01:41:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:41:54,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:54,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:41:54,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:54,760 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:54,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1462047953, now seen corresponding path program 1 times [2020-07-21 01:41:54,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:54,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245310926] [2020-07-21 01:41:54,762 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:54,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:41:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:41:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:54,859 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 01:41:54,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:41:54,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245310926] [2020-07-21 01:41:54,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:41:54,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:41:54,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096090277] [2020-07-21 01:41:54,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:41:54,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:41:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:41:54,864 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2020-07-21 01:41:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:54,918 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-21 01:41:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:41:54,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 01:41:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:54,921 INFO L225 Difference]: With dead ends: 32 [2020-07-21 01:41:54,921 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 01:41:54,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:41:54,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 01:41:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-07-21 01:41:54,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 01:41:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-21 01:41:54,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-07-21 01:41:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:54,934 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-21 01:41:54,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:41:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-21 01:41:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 01:41:54,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:54,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:41:55,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:55,144 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1463775831, now seen corresponding path program 1 times [2020-07-21 01:41:55,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:55,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388766332] [2020-07-21 01:41:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:55,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:41:55,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 01:41:55,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:55,240 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 01:41:55,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:41:55,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388766332] [2020-07-21 01:41:55,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:41:55,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 01:41:55,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996462643] [2020-07-21 01:41:55,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 01:41:55,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:55,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 01:41:55,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 01:41:55,244 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-07-21 01:41:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:55,319 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-07-21 01:41:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 01:41:55,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 01:41:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:55,321 INFO L225 Difference]: With dead ends: 29 [2020-07-21 01:41:55,321 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 01:41:55,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:41:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 01:41:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-21 01:41:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 01:41:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 01:41:55,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2020-07-21 01:41:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:55,331 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 01:41:55,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 01:41:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 01:41:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 01:41:55,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:55,333 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:41:55,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:55,541 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash -541842987, now seen corresponding path program 1 times [2020-07-21 01:41:55,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:55,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93726215] [2020-07-21 01:41:55,543 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:55,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:41:55,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:41:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 01:41:55,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:41:55,678 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 01:41:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:41:55,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:41:55,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93726215] [2020-07-21 01:41:55,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:41:55,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:41:55,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353125695] [2020-07-21 01:41:55,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:41:55,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:41:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:41:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:41:55,722 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-07-21 01:41:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:41:55,864 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-21 01:41:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:41:55,865 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-07-21 01:41:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:41:55,867 INFO L225 Difference]: With dead ends: 37 [2020-07-21 01:41:55,867 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 01:41:55,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-21 01:41:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 01:41:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 01:41:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 01:41:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-21 01:41:55,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2020-07-21 01:41:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:41:55,891 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-21 01:41:55,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:41:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-21 01:41:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 01:41:55,896 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:41:55,896 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:41:56,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:56,114 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:41:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:41:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash 814692392, now seen corresponding path program 1 times [2020-07-21 01:41:56,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:41:56,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581527595] [2020-07-21 01:41:56,116 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:56,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:41:56,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:41:56,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:41:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:41:56,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:41:56,186 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:41:56,186 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:41:56,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:41:56,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:41:56 BoogieIcfgContainer [2020-07-21 01:41:56,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:41:56,438 INFO L168 Benchmark]: Toolchain (without parser) took 3079.59 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 101.8 MB in the beginning and 91.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 67.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:56,439 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-21 01:41:56,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.41 ms. Allocated memory is still 143.7 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:56,441 INFO L168 Benchmark]: Boogie Preprocessor took 146.67 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:56,442 INFO L168 Benchmark]: RCFGBuilder took 324.12 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 166.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:56,444 INFO L168 Benchmark]: TraceAbstraction took 2336.91 ms. Allocated memory is still 200.8 MB. Free memory was 166.2 MB in the beginning and 91.1 MB in the end (delta: 75.0 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:41:56,447 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 143.7 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.41 ms. Allocated memory is still 143.7 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 146.67 ms. Allocated memory was 143.7 MB in the beginning and 200.8 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.12 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 166.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2336.91 ms. Allocated memory is still 200.8 MB. Free memory was 166.2 MB in the beginning and 91.1 MB in the end (delta: 75.0 MB). Peak memory consumption was 75.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 VAL [i=0, n=1, x=0, y=0] [L20] COND TRUE i