/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/for_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:44,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:44,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:44,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:44,773 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:44,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:44,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:44,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:44,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:44,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:44,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:44,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:44,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:44,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:44,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:44,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:44,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:44,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:44,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:44,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:44,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:44,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:44,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:44,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:44,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:44,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:44,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:44,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:44,838 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 [2020-07-20 11:47:44,867 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:44,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:44,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:44,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:44,869 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:44,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:44,870 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:44,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:44,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:44,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:44,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:44,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:44,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:44,871 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:44,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:44,871 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:44,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:44,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:44,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:44,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:44,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:44,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:44,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:44,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:44,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:44,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:44,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:44,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:44,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:44,874 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 [2020-07-20 11:47:45,152 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:45,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:45,169 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:45,171 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:45,171 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:45,172 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_infinite_loop_1.c [2020-07-20 11:47:45,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc5566d82/1ad533ff0a074a74935020275d9c0cdd/FLAG81a1cedf6 [2020-07-20 11:47:45,722 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:45,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_infinite_loop_1.c [2020-07-20 11:47:45,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc5566d82/1ad533ff0a074a74935020275d9c0cdd/FLAG81a1cedf6 [2020-07-20 11:47:46,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc5566d82/1ad533ff0a074a74935020275d9c0cdd [2020-07-20 11:47:46,147 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:47:46,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:47:46,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:46,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:47:46,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:47:46,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2162d0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46, skipping insertion in model container [2020-07-20 11:47:46,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:47:46,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:47:46,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:46,380 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:47:46,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:47:46,412 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:47:46,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46 WrapperNode [2020-07-20 11:47:46,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:47:46,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:47:46,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:47:46,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:47:46,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (1/1) ... [2020-07-20 11:47:46,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:47:46,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:47:46,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:47:46,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:47:46,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (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 [2020-07-20 11:47:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:47:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:47:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:47:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:47:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:47:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:47:46,574 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:47:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:47:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:47:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:47:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:47:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:47:46,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:47:46,778 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:47:46,778 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:47:46,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:46 BoogieIcfgContainer [2020-07-20 11:47:46,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:47:46,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:47:46,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:47:46,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:47:46,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:47:46" (1/3) ... [2020-07-20 11:47:46,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7732fbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:46, skipping insertion in model container [2020-07-20 11:47:46,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:47:46" (2/3) ... [2020-07-20 11:47:46,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7732fbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:47:46, skipping insertion in model container [2020-07-20 11:47:46,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:47:46" (3/3) ... [2020-07-20 11:47:46,791 INFO L109 eAbstractionObserver]: Analyzing ICFG for_infinite_loop_1.c [2020-07-20 11:47:46,802 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:47:46,808 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:47:46,823 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:47:46,846 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:47:46,847 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:47:46,847 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:47:46,847 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:47:46,847 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:47:46,847 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:47:46,848 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:47:46,848 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:47:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 11:47:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:47:46,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:46,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:46,870 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:46,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:46,874 INFO L82 PathProgramCache]: Analyzing trace with hash -253525299, now seen corresponding path program 1 times [2020-07-20 11:47:46,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:46,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811269293] [2020-07-20 11:47:46,883 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 [2020-07-20 11:47:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:46,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:47:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:47,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:47,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811269293] [2020-07-20 11:47:47,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:47,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:47:47,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732570641] [2020-07-20 11:47:47,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:47:47,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:47:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:47:47,071 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 11:47:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:47,090 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-07-20 11:47:47,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:47:47,092 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 11:47:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:47,100 INFO L225 Difference]: With dead ends: 33 [2020-07-20 11:47:47,100 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 11:47:47,104 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 [2020-07-20 11:47:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 11:47:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 11:47:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 11:47:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 11:47:47,139 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-20 11:47:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:47,139 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 11:47:47,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:47:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 11:47:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 11:47:47,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:47:47,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:47:47,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:47,357 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:47:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:47:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash -251737839, now seen corresponding path program 1 times [2020-07-20 11:47:47,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:47:47,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612730934] [2020-07-20 11:47:47,359 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 [2020-07-20 11:47:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:47:47,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 11:47:47,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:47:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:47:47,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:47:47,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612730934] [2020-07-20 11:47:47,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:47:47,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:47:47,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387860304] [2020-07-20 11:47:47,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:47:47,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:47:47,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:47:47,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:47:47,456 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-07-20 11:47:47,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:47:47,492 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-07-20 11:47:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:47:47,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-07-20 11:47:47,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:47:47,494 INFO L225 Difference]: With dead ends: 15 [2020-07-20 11:47:47,494 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:47:47,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:47:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:47:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:47:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:47:47,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:47:47,497 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-07-20 11:47:47,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:47:47,497 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:47:47,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:47:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:47:47,498 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:47:47,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:47,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:47:47,773 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:47:47,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:47:47,773 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:47:47,773 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:47:47,774 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:47:47,774 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:47:47,774 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:47:47,774 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:47:47,774 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:47:47,775 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:47:47,775 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 16 26) the Hoare annotation is: true [2020-07-20 11:47:47,775 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 26) no Hoare annotation was computed. [2020-07-20 11:47:47,775 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (= 0 main_~x~0) [2020-07-20 11:47:47,776 INFO L268 CegarLoopResult]: For program point L23-1(lines 21 24) no Hoare annotation was computed. [2020-07-20 11:47:47,776 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-20 11:47:47,776 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 24) the Hoare annotation is: (= 0 main_~x~0) [2020-07-20 11:47:47,776 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 24) the Hoare annotation is: false [2020-07-20 11:47:47,777 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 26) no Hoare annotation was computed. [2020-07-20 11:47:47,777 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 11:47:47,777 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:47:47,777 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 11:47:47,777 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-20 11:47:47,777 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:47:47,778 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 11:47:47,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:47:47 BoogieIcfgContainer [2020-07-20 11:47:47,797 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:47:47,803 INFO L168 Benchmark]: Toolchain (without parser) took 1650.04 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 101.8 MB in the beginning and 131.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 33.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:47,804 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:47:47,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.65 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:47,806 INFO L168 Benchmark]: Boogie Preprocessor took 109.77 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 181.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:47,807 INFO L168 Benchmark]: RCFGBuilder took 258.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 167.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:47,808 INFO L168 Benchmark]: TraceAbstraction took 1013.22 ms. Allocated memory is still 201.9 MB. Free memory was 167.0 MB in the beginning and 131.3 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:47:47,813 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.65 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.77 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 181.1 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 167.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1013.22 ms. Allocated memory is still 201.9 MB. Free memory was 167.0 MB in the beginning and 131.3 MB in the end (delta: 35.7 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: 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: 0 == x - 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: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 6 SDslu, 23 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 8 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 12 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 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, 300 SizeOfPredicates, 2 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 6 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...