/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/trex01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:11:51,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:11:51,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:11:51,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:11:51,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:11:51,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:11:51,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:11:51,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:11:51,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:11:51,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:11:51,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:11:51,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:11:51,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:11:51,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:11:51,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:11:51,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:11:51,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:11:51,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:11:51,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:11:51,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:11:51,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:11:51,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:11:51,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:11:51,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:11:51,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:11:51,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:11:51,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:11:51,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:11:51,497 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 23:11:51,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:11:51,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:11:51,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:11:51,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:11:51,525 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:11:51,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:11:51,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:11:51,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:11:51,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:11:51,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:11:51,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:11:51,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:11:51,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:11:51,528 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:11:51,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:11:51,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:11:51,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:11:51,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:11:51,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:11:51,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:11:51,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:11:51,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:11:51,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:11:51,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:11:51,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:11:51,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:11:51,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:51,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:11:51,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:11:51,535 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 23:11:51,870 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:11:51,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:11:51,887 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:11:51,888 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:11:51,889 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:11:51,889 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-2.i [2020-07-21 23:11:51,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4620d177a/281c0e6aefa94a5fa4b0631c90743bff/FLAG33dc1c6b9 [2020-07-21 23:11:52,465 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:11:52,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-2.i [2020-07-21 23:11:52,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4620d177a/281c0e6aefa94a5fa4b0631c90743bff/FLAG33dc1c6b9 [2020-07-21 23:11:52,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4620d177a/281c0e6aefa94a5fa4b0631c90743bff [2020-07-21 23:11:52,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:11:52,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:11:52,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:11:52,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:11:52,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:11:52,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d17c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:52, skipping insertion in model container [2020-07-21 23:11:52,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:11:52" (1/1) ... [2020-07-21 23:11:52,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:11:52,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:11:53,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:11:53,123 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:11:53,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:11:53,158 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:11:53,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53 WrapperNode [2020-07-21 23:11:53,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:11:53,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:11:53,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:11:53,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:11:53,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (1/1) ... [2020-07-21 23:11:53,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (1/1) ... [2020-07-21 23:11:53,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (1/1) ... [2020-07-21 23:11:53,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (1/1) ... [2020-07-21 23:11:53,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (1/1) ... [2020-07-21 23:11:53,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (1/1) ... [2020-07-21 23:11:53,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (1/1) ... [2020-07-21 23:11:53,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:11:53,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:11:53,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:11:53,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:11:53,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (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 23:11:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:11:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:11:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:11:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:11:53,344 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-21 23:11:53,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:11:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:11:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:11:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:11:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:11:53,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:11:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:11:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-21 23:11:53,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:11:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:11:53,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:11:53,671 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:11:53,672 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 23:11:53,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:11:53 BoogieIcfgContainer [2020-07-21 23:11:53,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:11:53,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:11:53,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:11:53,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:11:53,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:11:52" (1/3) ... [2020-07-21 23:11:53,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a92c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:11:53, skipping insertion in model container [2020-07-21 23:11:53,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:11:53" (2/3) ... [2020-07-21 23:11:53,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a92c70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:11:53, skipping insertion in model container [2020-07-21 23:11:53,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:11:53" (3/3) ... [2020-07-21 23:11:53,686 INFO L109 eAbstractionObserver]: Analyzing ICFG trex01-2.i [2020-07-21 23:11:53,697 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:11:53,705 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:11:53,720 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:11:53,745 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:11:53,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:11:53,745 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:11:53,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:11:53,745 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:11:53,745 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:11:53,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:11:53,746 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:11:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-21 23:11:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 23:11:53,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:11:53,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:11:53,774 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:11:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:11:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash -409844558, now seen corresponding path program 1 times [2020-07-21 23:11:53,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:11:53,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635297067] [2020-07-21 23:11:53,790 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 23:11:53,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:11:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:11:53,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:11:53,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:11:53,889 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 23:11:53,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:11:53,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635297067] [2020-07-21 23:11:53,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:11:53,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:11:53,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075871055] [2020-07-21 23:11:53,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:11:53,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:11:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:11:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:11:53,912 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-07-21 23:11:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:11:53,939 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2020-07-21 23:11:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:11:53,941 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-07-21 23:11:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:11:53,950 INFO L225 Difference]: With dead ends: 51 [2020-07-21 23:11:53,950 INFO L226 Difference]: Without dead ends: 16 [2020-07-21 23:11:53,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 23:11:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-21 23:11:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-21 23:11:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-21 23:11:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-07-21 23:11:53,993 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-07-21 23:11:53,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:11:53,994 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-07-21 23:11:53,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:11:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-07-21 23:11:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 23:11:53,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:11:53,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:11:54,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:54,209 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:11:54,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:11:54,210 INFO L82 PathProgramCache]: Analyzing trace with hash -413538642, now seen corresponding path program 1 times [2020-07-21 23:11:54,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:11:54,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721442062] [2020-07-21 23:11:54,212 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 23:11:54,252 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:11:54,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:11:54,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:11:54,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:11:54,302 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:11:54,335 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 23:11:54,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:11:54,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721442062] [2020-07-21 23:11:54,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:11:54,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:11:54,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108513020] [2020-07-21 23:11:54,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:11:54,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:11:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:11:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:11:54,340 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-07-21 23:11:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:11:54,399 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-07-21 23:11:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:11:54,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 23:11:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:11:54,400 INFO L225 Difference]: With dead ends: 16 [2020-07-21 23:11:54,400 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:11:54,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 23:11:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:11:54,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:11:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:11:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:11:54,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-21 23:11:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:11:54,404 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:11:54,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:11:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:11:54,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:11:54,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:11:54,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:11:54,686 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:11:54,687 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:11:54,687 INFO L268 CegarLoopResult]: For program point L27(lines 27 34) no Hoare annotation was computed. [2020-07-21 23:11:54,687 INFO L271 CegarLoopResult]: At program point L27-2(lines 25 35) the Hoare annotation is: true [2020-07-21 23:11:54,687 INFO L268 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-07-21 23:11:54,688 INFO L268 CegarLoopResult]: For program point L25-2(lines 14 36) no Hoare annotation was computed. [2020-07-21 23:11:54,688 INFO L264 CegarLoopResult]: At program point L19-2(line 19) the Hoare annotation is: (<= 1 f_~z~0) [2020-07-21 23:11:54,688 INFO L264 CegarLoopResult]: At program point L19-3(line 19) the Hoare annotation is: (<= 1 f_~z~0) [2020-07-21 23:11:54,688 INFO L268 CegarLoopResult]: For program point fEXIT(lines 14 36) no Hoare annotation was computed. [2020-07-21 23:11:54,689 INFO L271 CegarLoopResult]: At program point fENTRY(lines 14 36) the Hoare annotation is: true [2020-07-21 23:11:54,689 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-07-21 23:11:54,689 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-21 23:11:54,689 INFO L268 CegarLoopResult]: For program point L20(lines 14 36) no Hoare annotation was computed. [2020-07-21 23:11:54,689 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-07-21 23:11:54,690 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:11:54,690 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:11:54,690 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:11:54,690 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:11:54,690 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:11:54,691 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 23:11:54,691 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:11:54,691 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 23:11:54,691 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 37 45) the Hoare annotation is: true [2020-07-21 23:11:54,692 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 37 45) no Hoare annotation was computed. [2020-07-21 23:11:54,692 INFO L271 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: true [2020-07-21 23:11:54,692 INFO L268 CegarLoopResult]: For program point L42-1(lines 39 43) no Hoare annotation was computed. [2020-07-21 23:11:54,692 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 37 45) no Hoare annotation was computed. [2020-07-21 23:11:54,692 INFO L271 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: true [2020-07-21 23:11:54,693 INFO L268 CegarLoopResult]: For program point L39(lines 39 43) no Hoare annotation was computed. [2020-07-21 23:11:54,693 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 23:11:54,693 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:11:54,693 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 23:11:54,693 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 23:11:54,694 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 23:11:54,694 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 23:11:54,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:11:54 BoogieIcfgContainer [2020-07-21 23:11:54,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:11:54,719 INFO L168 Benchmark]: Toolchain (without parser) took 1841.94 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 103.2 MB in the beginning and 123.6 MB in the end (delta: -20.4 MB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,720 INFO L168 Benchmark]: CDTParser took 0.21 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. [2020-07-21 23:11:54,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.95 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 92.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,722 INFO L168 Benchmark]: Boogie Preprocessor took 125.41 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.9 MB in the beginning and 180.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,724 INFO L168 Benchmark]: RCFGBuilder took 391.35 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 165.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,725 INFO L168 Benchmark]: TraceAbstraction took 1037.98 ms. Allocated memory is still 202.4 MB. Free memory was 165.6 MB in the beginning and 123.6 MB in the end (delta: 42.0 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:11:54,731 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 280.95 ms. Allocated memory is still 138.4 MB. Free memory was 102.7 MB in the beginning and 92.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.41 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.9 MB in the beginning and 180.9 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.35 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 165.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1037.98 ms. Allocated memory is still 202.4 MB. Free memory was 165.6 MB in the beginning and 123.6 MB in the end (delta: 42.0 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 <= z - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 1 SDslu, 33 SDs, 0 SdLazy, 8 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 11 LocationsWithAnnotation, 16 PreInvPairs, 20 NumberOfFragments, 15 HoareAnnotationTreeSize, 16 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 468 SizeOfPredicates, 2 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...