/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex02-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:40:09,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:40:09,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:40:09,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:40:09,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:40:09,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:40:09,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:40:09,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:40:09,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:40:09,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:40:09,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:40:09,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:40:09,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:40:09,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:40:09,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:40:09,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:40:09,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:40:09,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:40:09,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:40:09,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:40:09,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:40:09,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:40:09,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:40:09,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:40:09,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:40:09,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:40:09,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:40:09,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:40:09,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:40:09,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:40:09,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:40:09,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:40:09,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:40:09,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:40:09,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:40:09,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:40:09,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:40:09,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:40:09,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:40:09,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:40:09,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:40:09,567 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 11:40:09,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:40:09,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:40:09,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:40:09,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:40:09,584 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:40:09,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:40:09,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:40:09,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:40:09,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:40:09,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:40:09,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:40:09,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:40:09,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:40:09,585 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:40:09,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:40:09,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:40:09,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:40:09,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:40:09,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:40:09,587 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:40:09,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:40:09,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:40:09,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:40:09,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:40:09,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:40:09,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:40:09,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:09,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:40:09,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:40:09,589 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 -> NOT_INCREMENTALLY [2020-07-21 11:40:09,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:40:09,905 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:40:09,908 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:40:09,911 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:40:09,913 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:40:09,915 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-1.c [2020-07-21 11:40:09,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa0a27d6d/79ba6a06db3748d1bcb47377fb9672fe/FLAGc194bfe8d [2020-07-21 11:40:10,475 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:40:10,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-1.c [2020-07-21 11:40:10,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa0a27d6d/79ba6a06db3748d1bcb47377fb9672fe/FLAGc194bfe8d [2020-07-21 11:40:10,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa0a27d6d/79ba6a06db3748d1bcb47377fb9672fe [2020-07-21 11:40:10,855 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:40:10,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:40:10,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:10,860 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:40:10,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:40:10,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:10" (1/1) ... [2020-07-21 11:40:10,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a01065e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:10, skipping insertion in model container [2020-07-21 11:40:10,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:10" (1/1) ... [2020-07-21 11:40:10,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:40:10,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:40:11,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:11,081 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:40:11,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:11,114 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:40:11,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11 WrapperNode [2020-07-21 11:40:11,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:11,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:40:11,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:40:11,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:40:11,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (1/1) ... [2020-07-21 11:40:11,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (1/1) ... [2020-07-21 11:40:11,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (1/1) ... [2020-07-21 11:40:11,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (1/1) ... [2020-07-21 11:40:11,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (1/1) ... [2020-07-21 11:40:11,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (1/1) ... [2020-07-21 11:40:11,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (1/1) ... [2020-07-21 11:40:11,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:40:11,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:40:11,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:40:11,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:40:11,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (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 11:40:11,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:40:11,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:40:11,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:40:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-21 11:40:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:40:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:40:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:40:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 11:40:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:40:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-21 11:40:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:40:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:40:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:40:11,547 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:40:11,550 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:40:11,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:11 BoogieIcfgContainer [2020-07-21 11:40:11,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:40:11,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:40:11,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:40:11,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:40:11,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:40:10" (1/3) ... [2020-07-21 11:40:11,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c01c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:11, skipping insertion in model container [2020-07-21 11:40:11,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:11" (2/3) ... [2020-07-21 11:40:11,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c01c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:11, skipping insertion in model container [2020-07-21 11:40:11,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:11" (3/3) ... [2020-07-21 11:40:11,582 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-1.c [2020-07-21 11:40:11,611 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:40:11,627 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:40:11,659 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:40:11,687 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:40:11,687 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:40:11,687 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:40:11,687 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:40:11,687 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:40:11,688 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:40:11,688 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:40:11,688 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:40:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 11:40:11,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:40:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:11,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:11,713 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:11,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:11,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-07-21 11:40:11,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:11,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054031728] [2020-07-21 11:40:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:40:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:11,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:40:11,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:11,811 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 11:40:11,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:11,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054031728] [2020-07-21 11:40:11,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:11,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:40:11,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711190263] [2020-07-21 11:40:11,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:40:11,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:11,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:40:11,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:40:11,833 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-07-21 11:40:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:11,855 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-21 11:40:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:40:11,857 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 11:40:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:11,866 INFO L225 Difference]: With dead ends: 35 [2020-07-21 11:40:11,868 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 11:40:11,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:40:11,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 11:40:11,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 11:40:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 11:40:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 11:40:11,910 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-07-21 11:40:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:11,910 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 11:40:11,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:40:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 11:40:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:40:11,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:11,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:12,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:12,120 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:12,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-07-21 11:40:12,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:12,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378101494] [2020-07-21 11:40:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:40:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:12,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:40:12,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:12,205 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:40:12,250 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 11:40:12,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:12,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378101494] [2020-07-21 11:40:12,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:12,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:40:12,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910872877] [2020-07-21 11:40:12,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:40:12,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:40:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:40:12,256 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-07-21 11:40:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:12,306 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-07-21 11:40:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:40:12,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-21 11:40:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:12,308 INFO L225 Difference]: With dead ends: 18 [2020-07-21 11:40:12,308 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:40:12,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:40:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:40:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:40:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:40:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:40:12,311 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-07-21 11:40:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:12,312 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:40:12,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:40:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:40:12,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:40:12,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:12,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:40:12,624 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:40:12,624 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:40:12,625 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:40:12,625 INFO L268 CegarLoopResult]: For program point fooEXIT(lines 15 17) no Hoare annotation was computed. [2020-07-21 11:40:12,625 INFO L271 CegarLoopResult]: At program point fooENTRY(lines 15 17) the Hoare annotation is: true [2020-07-21 11:40:12,625 INFO L268 CegarLoopResult]: For program point fooFINAL(lines 15 17) no Hoare annotation was computed. [2020-07-21 11:40:12,625 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:40:12,626 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (<= ~x~0 0) [2020-07-21 11:40:12,626 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:40:12,626 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:40:12,627 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 19 27) the Hoare annotation is: (or (not (<= |old(~x~0)| 0)) (<= ~x~0 0)) [2020-07-21 11:40:12,627 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 19 27) no Hoare annotation was computed. [2020-07-21 11:40:12,627 INFO L271 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-07-21 11:40:12,627 INFO L268 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-07-21 11:40:12,627 INFO L271 CegarLoopResult]: At program point L24-1(lines 21 25) the Hoare annotation is: true [2020-07-21 11:40:12,628 INFO L271 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: true [2020-07-21 11:40:12,628 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 25) the Hoare annotation is: (or (not (<= |old(~x~0)| 0)) (<= ~x~0 0)) [2020-07-21 11:40:12,628 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 19 27) no Hoare annotation was computed. [2020-07-21 11:40:12,628 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-21 11:40:12,629 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-21 11:40:12,629 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-21 11:40:12,629 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-21 11:40:12,629 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-21 11:40:12,630 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-21 11:40:12,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:40:12 BoogieIcfgContainer [2020-07-21 11:40:12,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:40:12,648 INFO L168 Benchmark]: Toolchain (without parser) took 1789.02 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.9 MB in the beginning and 127.8 MB in the end (delta: -25.9 MB). Peak memory consumption was 38.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:12,650 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:40:12,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.50 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:12,655 INFO L168 Benchmark]: Boogie Preprocessor took 111.37 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 181.1 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:12,657 INFO L168 Benchmark]: RCFGBuilder took 333.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 168.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:12,658 INFO L168 Benchmark]: TraceAbstraction took 1080.02 ms. Allocated memory is still 201.9 MB. Free memory was 167.6 MB in the beginning and 127.8 MB in the end (delta: 39.7 MB). Peak memory consumption was 39.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:40:12,671 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.50 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.37 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 92.3 MB in the beginning and 181.1 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 168.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1080.02 ms. Allocated memory is still 201.9 MB. Free memory was 167.6 MB in the beginning and 127.8 MB in the end (delta: 39.7 MB). Peak memory consumption was 39.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 6 SDslu, 41 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 10 LocationsWithAnnotation, 12 PreInvPairs, 13 NumberOfFragments, 26 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 260 SizeOfPredicates, 3 NumberOfNonLiveVariables, 60 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...