/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/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:15:34,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:15:34,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:15:34,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:15:34,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:15:34,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:15:34,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:15:34,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:15:34,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:15:34,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:15:34,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:15:34,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:15:34,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:15:34,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:15:34,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:15:34,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:15:34,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:15:34,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:15:34,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:15:34,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:15:34,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:15:34,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:15:34,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:15:34,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:15:34,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:15:34,588 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 02:15:34,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:15:34,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:15:34,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:15:34,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:15:34,605 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:15:34,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:15:34,605 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:15:34,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:15:34,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:15:34,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:15:34,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:15:34,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:15:34,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:15:34,607 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:15:34,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:15:34,607 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:15:34,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:15:34,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:15:34,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:15:34,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:15:34,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:15:34,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:15:34,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:15:34,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:15:34,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:15:34,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:15:34,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:15:34,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:15:34,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:15:34,610 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 02:15:34,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:15:34,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:15:34,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:15:34,930 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:15:34,930 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:15:34,931 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-21 02:15:35,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e61dc76d4/a388aeb3d4b942d3b5a52764bc08a63e/FLAG3bcc5d786 [2020-07-21 02:15:35,557 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:15:35,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-21 02:15:35,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e61dc76d4/a388aeb3d4b942d3b5a52764bc08a63e/FLAG3bcc5d786 [2020-07-21 02:15:35,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e61dc76d4/a388aeb3d4b942d3b5a52764bc08a63e [2020-07-21 02:15:35,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:15:35,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:15:35,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:15:35,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:15:35,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:15:35,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:15:35" (1/1) ... [2020-07-21 02:15:35,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@143da84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:35, skipping insertion in model container [2020-07-21 02:15:35,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:15:35" (1/1) ... [2020-07-21 02:15:35,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:15:35,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:15:36,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:15:36,108 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:15:36,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:15:36,135 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:15:36,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36 WrapperNode [2020-07-21 02:15:36,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:15:36,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:15:36,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:15:36,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:15:36,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (1/1) ... [2020-07-21 02:15:36,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (1/1) ... [2020-07-21 02:15:36,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (1/1) ... [2020-07-21 02:15:36,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (1/1) ... [2020-07-21 02:15:36,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (1/1) ... [2020-07-21 02:15:36,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (1/1) ... [2020-07-21 02:15:36,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (1/1) ... [2020-07-21 02:15:36,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:15:36,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:15:36,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:15:36,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:15:36,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (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 02:15:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:15:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:15:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:15:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 02:15:36,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:15:36,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:15:36,503 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:15:36,503 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 02:15:36,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:15:36 BoogieIcfgContainer [2020-07-21 02:15:36,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:15:36,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:15:36,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:15:36,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:15:36,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:15:35" (1/3) ... [2020-07-21 02:15:36,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3a5f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:15:36, skipping insertion in model container [2020-07-21 02:15:36,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:15:36" (2/3) ... [2020-07-21 02:15:36,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3a5f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:15:36, skipping insertion in model container [2020-07-21 02:15:36,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:15:36" (3/3) ... [2020-07-21 02:15:36,517 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-07-21 02:15:36,529 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:15:36,536 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:15:36,557 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:15:36,589 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:15:36,589 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:15:36,589 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:15:36,590 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:15:36,590 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:15:36,590 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:15:36,590 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:15:36,590 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:15:36,615 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 02:15:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 02:15:36,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:15:36,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:15:36,623 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:15:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:15:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-21 02:15:36,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:15:36,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986215366] [2020-07-21 02:15:36,641 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 02:15:36,702 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:15:36,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:15:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 02:15:36,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:15:36,730 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 02:15:36,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:15:36,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986215366] [2020-07-21 02:15:36,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:15:36,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 02:15:36,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517464369] [2020-07-21 02:15:36,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 02:15:36,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:15:36,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 02:15:36,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 02:15:36,751 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 02:15:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:15:36,776 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-21 02:15:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 02:15:36,777 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 02:15:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:15:36,786 INFO L225 Difference]: With dead ends: 35 [2020-07-21 02:15:36,786 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 02:15:36,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 02:15:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 02:15:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 02:15:36,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 02:15:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 02:15:36,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-21 02:15:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:15:36,833 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 02:15:36,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 02:15:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 02:15:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 02:15:36,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:15:36,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:15:37,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:15:37,040 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:15:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:15:37,041 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-21 02:15:37,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:15:37,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487711206] [2020-07-21 02:15:37,043 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 02:15:37,072 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:15:37,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:15:37,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:15:37,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:15:37,202 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 02:15:37,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:15:37,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487711206] [2020-07-21 02:15:37,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:15:37,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:15:37,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831637928] [2020-07-21 02:15:37,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:15:37,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:15:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:15:37,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:15:37,214 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 02:15:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:15:37,311 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 02:15:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:15:37,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 02:15:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:15:37,314 INFO L225 Difference]: With dead ends: 25 [2020-07-21 02:15:37,314 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 02:15:37,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:15:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 02:15:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 02:15:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 02:15:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 02:15:37,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 02:15:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:15:37,332 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 02:15:37,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:15:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 02:15:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 02:15:37,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:15:37,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:15:37,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:15:37,550 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:15:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:15:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-21 02:15:37,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:15:37,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95564632] [2020-07-21 02:15:37,553 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 02:15:37,586 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:15:37,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:15:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 02:15:37,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:15:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:15:37,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:15:37,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:15:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 02:15:37,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95564632] [2020-07-21 02:15:37,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 02:15:37,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-07-21 02:15:37,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138497562] [2020-07-21 02:15:37,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:15:37,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:15:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:15:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:15:37,777 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-07-21 02:15:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:15:37,812 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 02:15:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:15:37,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-07-21 02:15:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:15:37,814 INFO L225 Difference]: With dead ends: 22 [2020-07-21 02:15:37,814 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 02:15:37,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:15:37,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 02:15:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 02:15:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 02:15:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 02:15:37,816 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-21 02:15:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:15:37,816 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 02:15:37,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:15:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 02:15:37,817 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 02:15:38,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:15:38,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 02:15:38,116 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 02:15:38,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:15:38,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:15:38,117 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 02:15:38,117 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 02:15:38,117 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 02:15:38,118 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-21 02:15:38,118 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 02:15:38,118 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-21 02:15:38,118 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 02:15:38,119 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-07-21 02:15:38,119 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 15 36) the Hoare annotation is: true [2020-07-21 02:15:38,120 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 15 36) no Hoare annotation was computed. [2020-07-21 02:15:38,120 INFO L264 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2020-07-21 02:15:38,120 INFO L268 CegarLoopResult]: For program point L24-1(lines 23 32) no Hoare annotation was computed. [2020-07-21 02:15:38,120 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 32) the Hoare annotation is: (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2020-07-21 02:15:38,121 INFO L264 CegarLoopResult]: At program point L23-3(lines 23 32) the Hoare annotation is: (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2020-07-21 02:15:38,121 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 15 36) no Hoare annotation was computed. [2020-07-21 02:15:38,122 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 13) the Hoare annotation is: true [2020-07-21 02:15:38,122 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 13) no Hoare annotation was computed. [2020-07-21 02:15:38,122 INFO L268 CegarLoopResult]: For program point L9(lines 9 10) no Hoare annotation was computed. [2020-07-21 02:15:38,122 INFO L268 CegarLoopResult]: For program point L8(lines 8 11) no Hoare annotation was computed. [2020-07-21 02:15:38,123 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 13) no Hoare annotation was computed. [2020-07-21 02:15:38,123 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2020-07-21 02:15:38,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:15:38 BoogieIcfgContainer [2020-07-21 02:15:38,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 02:15:38,150 INFO L168 Benchmark]: Toolchain (without parser) took 2243.56 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 100.9 MB in the beginning and 106.0 MB in the end (delta: -5.0 MB). Peak memory consumption was 51.6 MB. Max. memory is 7.1 GB. [2020-07-21 02:15:38,153 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 02:15:38,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.62 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 90.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 02:15:38,157 INFO L168 Benchmark]: Boogie Preprocessor took 114.09 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 90.7 MB in the beginning and 179.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-21 02:15:38,163 INFO L168 Benchmark]: RCFGBuilder took 258.42 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 167.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-07-21 02:15:38,164 INFO L168 Benchmark]: TraceAbstraction took 1636.16 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 106.0 MB in the end (delta: 61.0 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2020-07-21 02:15:38,177 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 144.2 MB. Free memory was 119.1 MB in the beginning and 118.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.62 ms. Allocated memory is still 144.2 MB. Free memory was 100.5 MB in the beginning and 90.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.09 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 90.7 MB in the beginning and 179.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.42 ms. Allocated memory is still 200.8 MB. Free memory was 179.4 MB in the beginning and 167.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1636.16 ms. Allocated memory is still 200.8 MB. Free memory was 166.9 MB in the beginning and 106.0 MB in the end (delta: 61.0 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: 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: 23]: Loop Invariant Derived loop invariant: x * 2 == y + y * y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 44 SDtfs, 12 SDslu, 59 SDs, 0 SdLazy, 27 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=2, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 32 HoareAnnotationTreeSize, 13 FomulaSimplifications, 34 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 37 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 2066 SizeOfPredicates, 4 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 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...