/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:35:39,438 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 20:35:39,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:35:39,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:35:39,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:35:39,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:35:39,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:35:39,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:35:39,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:35:39,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:35:39,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:35:39,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:35:39,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:35:39,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:35:39,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:35:39,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:35:39,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:35:39,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:35:39,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:35:39,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:35:39,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:35:39,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:35:39,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:35:39,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:35:39,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:35:39,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:35:39,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:35:39,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:35:39,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:35:39,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:35:39,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:35:39,559 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:35:39,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:35:39,559 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:35:39,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:35:39,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:35:39,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:35:39,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:35:39,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:35:39,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:35:39,562 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:35:39,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:35:39,563 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:35:39,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:35:39,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:35:39,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:35:39,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:35:39,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:35:39,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:35:39,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:35:39,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:35:39,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:35:39,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:35:39,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:39,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:35:39,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:35:39,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:35:39,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:35:39,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:35:39,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:35:39,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:35:39,932 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:35:39,933 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-21 20:35:40,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d545e0f18/61dd87b228564e2ca0c0629e23c21c03/FLAGac134ee0a [2020-07-21 20:35:40,557 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:35:40,557 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+cfa-reducer.c [2020-07-21 20:35:40,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d545e0f18/61dd87b228564e2ca0c0629e23c21c03/FLAGac134ee0a [2020-07-21 20:35:40,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d545e0f18/61dd87b228564e2ca0c0629e23c21c03 [2020-07-21 20:35:40,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:35:40,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:35:40,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:35:40,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:35:40,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:35:40,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:40" (1/1) ... [2020-07-21 20:35:40,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0147c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:40, skipping insertion in model container [2020-07-21 20:35:40,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:35:40" (1/1) ... [2020-07-21 20:35:40,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:35:40,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:35:41,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:35:41,210 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:35:41,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:35:41,249 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:35:41,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41 WrapperNode [2020-07-21 20:35:41,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:35:41,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:35:41,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:35:41,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:35:41,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... [2020-07-21 20:35:41,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... [2020-07-21 20:35:41,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... [2020-07-21 20:35:41,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... [2020-07-21 20:35:41,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... [2020-07-21 20:35:41,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... [2020-07-21 20:35:41,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... [2020-07-21 20:35:41,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:35:41,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:35:41,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:35:41,384 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:35:41,385 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:35:41,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:35:41,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:35:41,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:35:41,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:35:41,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:35:41,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:35:41,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:35:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:35:41,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:35:41,469 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:35:41,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:35:41,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:35:41,681 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:35:41,681 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 20:35:41,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:41 BoogieIcfgContainer [2020-07-21 20:35:41,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:35:41,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:35:41,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:35:41,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:35:41,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:35:40" (1/3) ... [2020-07-21 20:35:41,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0eefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:41, skipping insertion in model container [2020-07-21 20:35:41,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:35:41" (2/3) ... [2020-07-21 20:35:41,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0eefc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:35:41, skipping insertion in model container [2020-07-21 20:35:41,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:35:41" (3/3) ... [2020-07-21 20:35:41,696 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+cfa-reducer.c [2020-07-21 20:35:41,708 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:35:41,717 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:35:41,735 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:35:41,761 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:35:41,761 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:35:41,761 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:35:41,761 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:35:41,762 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:35:41,762 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:35:41,762 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:35:41,763 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:35:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-07-21 20:35:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 20:35:41,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:41,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:41,793 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1330899215, now seen corresponding path program 1 times [2020-07-21 20:35:41,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:41,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895569374] [2020-07-21 20:35:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:41,914 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:35:41,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 20:35:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:35:42,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:35:42,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895569374] [2020-07-21 20:35:42,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:35:42,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:35:42,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901492962] [2020-07-21 20:35:42,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:35:42,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:35:42,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:35:42,045 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-07-21 20:35:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:42,080 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-21 20:35:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:35:42,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 20:35:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:42,091 INFO L225 Difference]: With dead ends: 26 [2020-07-21 20:35:42,092 INFO L226 Difference]: Without dead ends: 13 [2020-07-21 20:35:42,096 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 20:35:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-21 20:35:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-21 20:35:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-21 20:35:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-21 20:35:42,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-21 20:35:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:42,143 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-21 20:35:42,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:35:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-21 20:35:42,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 20:35:42,144 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:35:42,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:35:42,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:42,358 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:35:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:35:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1691859760, now seen corresponding path program 1 times [2020-07-21 20:35:42,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:35:42,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73479935] [2020-07-21 20:35:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:42,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:35:42,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:35:42,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:35:42,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:35:42,472 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:42,478 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:35:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:35:42,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:35:42,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:35:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:35:42,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73479935] [2020-07-21 20:35:42,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:35:42,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-07-21 20:35:42,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138727593] [2020-07-21 20:35:42,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:35:42,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:35:42,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:35:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:35:42,589 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-07-21 20:35:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:35:42,676 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-07-21 20:35:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:35:42,676 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-21 20:35:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:35:42,677 INFO L225 Difference]: With dead ends: 15 [2020-07-21 20:35:42,677 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 20:35:42,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:35:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 20:35:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 20:35:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 20:35:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 20:35:42,681 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-07-21 20:35:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:35:42,682 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 20:35:42,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:35:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 20:35:42,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 20:35:42,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:35:42,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 20:35:42,995 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:35:42,995 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:35:42,996 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:35:42,996 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 20:35:42,996 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 20:35:42,996 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 20:35:42,996 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 20:35:42,997 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-21 20:35:42,997 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 20:35:42,997 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-21 20:35:42,997 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 20:35:42,998 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-07-21 20:35:42,998 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: true [2020-07-21 20:35:42,998 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-07-21 20:35:42,998 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-07-21 20:35:42,998 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-07-21 20:35:42,998 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-21 20:35:42,999 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-07-21 20:35:42,999 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-21 20:35:42,999 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (or (< 0 main_~main__y~0) (< main_~main__x~0 0)) [2020-07-21 20:35:43,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:35:43 BoogieIcfgContainer [2020-07-21 20:35:43,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:35:43,026 INFO L168 Benchmark]: Toolchain (without parser) took 2131.50 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 103.3 MB in the beginning and 119.6 MB in the end (delta: -16.4 MB). Peak memory consumption was 47.1 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,028 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.26 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 93.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,030 INFO L168 Benchmark]: Boogie Preprocessor took 132.37 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 180.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,031 INFO L168 Benchmark]: RCFGBuilder took 303.29 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 168.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,032 INFO L168 Benchmark]: TraceAbstraction took 1334.29 ms. Allocated memory is still 201.9 MB. Free memory was 167.9 MB in the beginning and 119.6 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:35:43,037 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 354.26 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 93.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.37 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 180.7 MB in the end (delta: -87.3 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.29 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 168.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1334.29 ms. Allocated memory is still 201.9 MB. Free memory was 167.9 MB in the beginning and 119.6 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: 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: 28]: Loop Invariant Derived loop invariant: 0 < main__y || main__x < 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 7 SDslu, 34 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred 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, 5 LocationsWithAnnotation, 5 PreInvPairs, 7 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 814 SizeOfPredicates, 6 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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...