/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --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 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:10:28,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:10:28,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:10:28,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 06:10:28,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:10:28,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:10:28,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:10:28,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:10:28,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:10:28,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:10:28,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:10:28,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:10:28,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:10:28,837 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:10:28,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:10:28,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:10:28,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:10:28,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:10:28,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:10:28,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:10:28,852 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 06:10:28,875 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:10:28,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:10:28,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:10:28,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:10:28,877 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:10:28,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:10:28,878 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:10:28,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:10:28,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:10:28,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:10:28,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:10:28,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:10:28,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:10:28,881 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:10:28,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:10:28,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:10:28,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:10:28,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:10:28,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:10:28,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:10:28,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:10:28,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:10:28,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:10:28,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:10:28,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:10:28,884 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:10:28,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:10:28,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:10:28,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:10:28,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 06:10:29,169 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:10:29,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:10:29,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:10:29,188 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:10:29,189 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:10:29,191 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-07-20 06:10:29,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9eb2516/777f0b06f83146bb84088afe7b2e72ee/FLAG9e930be0c [2020-07-20 06:10:29,731 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:10:29,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.p+cfa-reducer.c [2020-07-20 06:10:29,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9eb2516/777f0b06f83146bb84088afe7b2e72ee/FLAG9e930be0c [2020-07-20 06:10:30,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be9eb2516/777f0b06f83146bb84088afe7b2e72ee [2020-07-20 06:10:30,067 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:10:30,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:10:30,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:30,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:10:30,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:10:30,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77adff1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30, skipping insertion in model container [2020-07-20 06:10:30,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:10:30,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:10:30,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:30,273 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:10:30,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:30,304 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:10:30,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30 WrapperNode [2020-07-20 06:10:30,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:30,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:10:30,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:10:30,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:10:30,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,328 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,330 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (1/1) ... [2020-07-20 06:10:30,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:10:30,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:10:30,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:10:30,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:10:30,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (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 06:10:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:10:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:10:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:10:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:10:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:10:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:10:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:10:30,665 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:10:30,666 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 06:10:30,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:30 BoogieIcfgContainer [2020-07-20 06:10:30,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:10:30,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:10:30,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:10:30,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:10:30,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:10:30" (1/3) ... [2020-07-20 06:10:30,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c57cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:30, skipping insertion in model container [2020-07-20 06:10:30,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:30" (2/3) ... [2020-07-20 06:10:30,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c57cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:30, skipping insertion in model container [2020-07-20 06:10:30,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:30" (3/3) ... [2020-07-20 06:10:30,677 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.p+cfa-reducer.c [2020-07-20 06:10:30,685 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:10:30,692 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:10:30,706 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:10:30,735 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:10:30,737 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:10:30,738 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:10:30,738 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:10:30,738 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:10:30,738 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:10:30,739 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:10:30,739 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:10:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-07-20 06:10:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 06:10:30,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:30,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:30,764 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1330899215, now seen corresponding path program 1 times [2020-07-20 06:10:30,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:30,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749023311] [2020-07-20 06:10:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bf714c [2020-07-20 06:10:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:30,958 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 06:10:30,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749023311] [2020-07-20 06:10:30,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:10:30,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 06:10:30,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773591351] [2020-07-20 06:10:30,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 06:10:30,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 06:10:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 06:10:31,000 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-07-20 06:10:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:31,095 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-20 06:10:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 06:10:31,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-07-20 06:10:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:31,108 INFO L225 Difference]: With dead ends: 26 [2020-07-20 06:10:31,108 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 06:10:31,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 06:10:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 06:10:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 06:10:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 06:10:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 06:10:31,150 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 06:10:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:31,151 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 06:10:31,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 06:10:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 06:10:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 06:10:31,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:31,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:31,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:10:31,153 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1691859760, now seen corresponding path program 1 times [2020-07-20 06:10:31,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:31,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002256992] [2020-07-20 06:10:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bf714c [2020-07-20 06:10:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:31,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002256992] [2020-07-20 06:10:31,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445927455] [2020-07-20 06:10:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a96fb93 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:31,315 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a96fb93 issued 4 check-sat command(s) [2020-07-20 06:10:31,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:10:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:31,366 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:31,371 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:31,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:31,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 06:10:31,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310256481] [2020-07-20 06:10:31,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 06:10:31,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 06:10:31,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 06:10:31,395 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-07-20 06:10:31,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:31,491 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-07-20 06:10:31,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:10:31,492 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-20 06:10:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:31,493 INFO L225 Difference]: With dead ends: 17 [2020-07-20 06:10:31,494 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 06:10:31,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:10:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 06:10:31,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 06:10:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 06:10:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 06:10:31,507 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 06:10:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:31,508 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 06:10:31,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 06:10:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 06:10:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 06:10:31,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:31,511 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:31,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:10:31,712 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:31,714 INFO L82 PathProgramCache]: Analyzing trace with hash -908107473, now seen corresponding path program 2 times [2020-07-20 06:10:31,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:31,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347009962] [2020-07-20 06:10:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bf714c [2020-07-20 06:10:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:31,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347009962] [2020-07-20 06:10:31,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246165410] [2020-07-20 06:10:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3aaf9e09 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:31,850 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3aaf9e09 issued 3 check-sat command(s) [2020-07-20 06:10:31,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:31,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:10:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:31,883 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:31,885 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:31,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:31,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 06:10:31,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759747422] [2020-07-20 06:10:31,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 06:10:31,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:31,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 06:10:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:10:31,909 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-07-20 06:10:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:32,015 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-07-20 06:10:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:10:32,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-07-20 06:10:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:32,017 INFO L225 Difference]: With dead ends: 18 [2020-07-20 06:10:32,017 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 06:10:32,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:10:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 06:10:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 06:10:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:10:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 06:10:32,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-07-20 06:10:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:32,037 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 06:10:32,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 06:10:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 06:10:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 06:10:32,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:32,037 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:32,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:32,239 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:32,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1913376944, now seen corresponding path program 3 times [2020-07-20 06:10:32,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:32,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741477642] [2020-07-20 06:10:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bf714c [2020-07-20 06:10:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:32,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741477642] [2020-07-20 06:10:32,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394710357] [2020-07-20 06:10:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cb3ff30 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:32,384 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4cb3ff30 issued 4 check-sat command(s) [2020-07-20 06:10:32,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 06:10:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:34,577 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:34,579 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:34,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:34,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-07-20 06:10:34,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686888199] [2020-07-20 06:10:34,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 06:10:34,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 06:10:34,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=107, Unknown=1, NotChecked=0, Total=132 [2020-07-20 06:10:34,614 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-20 06:10:39,031 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-07-20 06:10:39,290 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-07-20 06:10:43,381 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2020-07-20 06:10:45,471 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-07-20 06:10:45,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:45,474 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2020-07-20 06:10:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:10:45,476 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-20 06:10:45,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:45,477 INFO L225 Difference]: With dead ends: 17 [2020-07-20 06:10:45,477 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 06:10:45,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=74, Invalid=267, Unknown=1, NotChecked=0, Total=342 [2020-07-20 06:10:45,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 06:10:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 06:10:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 06:10:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 06:10:45,480 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-07-20 06:10:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:45,480 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 06:10:45,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 06:10:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 06:10:45,481 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 06:10:45,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:45,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 06:10:45,842 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-07-20 06:10:45,845 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 06:10:45,845 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__return_main~0 |old(~__return_main~0)|) (= ~__return_144~0 |old(~__return_144~0)|)) [2020-07-20 06:10:45,846 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 06:10:45,846 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 06:10:45,846 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 06:10:45,846 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 06:10:45,846 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 06:10:45,846 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 06:10:45,846 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 06:10:45,847 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 06:10:45,847 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 06:10:45,847 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2020-07-20 06:10:45,847 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 11 58) the Hoare annotation is: (= |old(~__return_144~0)| ~__return_144~0) [2020-07-20 06:10:45,847 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 58) no Hoare annotation was computed. [2020-07-20 06:10:45,847 INFO L268 CegarLoopResult]: For program point L23(lines 23 56) no Hoare annotation was computed. [2020-07-20 06:10:45,848 INFO L268 CegarLoopResult]: For program point L17(lines 17 57) no Hoare annotation was computed. [2020-07-20 06:10:45,848 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-07-20 06:10:45,848 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 11 58) no Hoare annotation was computed. [2020-07-20 06:10:45,848 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-20 06:10:45,848 INFO L264 CegarLoopResult]: At program point L35(lines 28 56) the Hoare annotation is: (let ((.cse0 (= |old(~__return_144~0)| ~__return_144~0))) (or (and (exists ((v_main_~main__x~0_12 Int)) (and (<= (+ (div (+ (* v_main_~main__x~0_12 (- 1)) (- 2)) (- 2)) 2) main_~main__y~0) (<= (+ main_~main__x~0 1) (+ main_~main__y~0 v_main_~main__x~0_12)))) (<= (+ main_~main__x~0 2) main_~main__y~0) .cse0) (and (<= (+ main_~main__x~0 50) 0) .cse0))) [2020-07-20 06:10:45,862 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:45,864 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:45,872 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:45,873 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:45,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:10:45 BoogieIcfgContainer [2020-07-20 06:10:45,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:10:45,879 INFO L168 Benchmark]: Toolchain (without parser) took 15810.34 ms. Allocated memory was 137.4 MB in the beginning and 232.8 MB in the end (delta: 95.4 MB). Free memory was 102.2 MB in the beginning and 131.7 MB in the end (delta: -29.6 MB). Peak memory consumption was 65.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:45,880 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 06:10:45,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.63 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 92.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:45,882 INFO L168 Benchmark]: Boogie Preprocessor took 26.62 ms. Allocated memory is still 137.4 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:45,883 INFO L168 Benchmark]: RCFGBuilder took 337.15 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 168.7 MB in the end (delta: -77.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:45,884 INFO L168 Benchmark]: TraceAbstraction took 15206.86 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 167.7 MB in the beginning and 131.7 MB in the end (delta: 35.9 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. [2020-07-20 06:10:45,892 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.63 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 92.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.62 ms. Allocated memory is still 137.4 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.15 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 168.7 MB in the end (delta: -77.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15206.86 ms. Allocated memory was 201.3 MB in the beginning and 232.8 MB in the end (delta: 31.5 MB). Free memory was 167.7 MB in the beginning and 131.7 MB in the end (delta: 35.9 MB). Peak memory consumption was 67.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant [2020-07-20 06:10:45,901 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:45,901 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:45,902 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] [2020-07-20 06:10:45,902 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~main__x~0_12,QUANTIFIED] Derived loop invariant: (((\exists v_main_~main__x~0_12 : int :: (v_main_~main__x~0_12 * -1 + -2) / -2 + 2 <= main__y && main__x + 1 <= main__y + v_main_~main__x~0_12) && main__x + 2 <= main__y) && \old(__return_144) == __return_144) || (main__x + 50 <= 0 && \old(__return_144) == __return_144) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.9s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 11.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 43 SDslu, 97 SDs, 0 SdLazy, 130 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 9 NumberOfFragments, 51 HoareAnnotationTreeSize, 5 FomulaSimplifications, 45 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 41 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 89 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 82 ConstructedInterpolants, 1 QuantifiedInterpolants, 3217 SizeOfPredicates, 12 NumberOfNonLiveVariables, 155 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 3/20 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...