/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 NUM_FUNCTIONS --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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:39:45,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:39:45,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:39:45,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:39:45,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:39:45,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:39:45,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:39:45,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:39:45,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:39:45,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:39:45,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:39:45,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:39:45,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:39:45,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:39:45,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:39:45,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:39:45,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:39:45,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:39:45,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:39:45,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:39:45,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:39:45,527 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:39:45,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:39:45,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:39:45,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:39:45,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:39:45,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:39:45,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:39:45,560 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 [2020-07-19 23:39:45,585 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:39:45,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:39:45,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:39:45,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:39:45,588 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:39:45,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:39:45,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:39:45,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:39:45,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:39:45,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:39:45,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:39:45,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:39:45,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:39:45,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:39:45,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:39:45,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:39:45,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:39:45,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:39:45,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:39:45,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:39:45,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:39:45,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:39:45,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:39:45,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:39:45,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:39:45,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:39:45,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:39:45,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:39:45,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:39:45,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:39:45,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:39:45,940 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:39:45,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:39:45,945 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:39:45,945 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:39:45,946 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-19 23:39:46,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10a0d924/022ac56e762a4d94a17c552a41583e23/FLAGb1917530c [2020-07-19 23:39:46,511 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:39:46,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-19 23:39:46,518 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10a0d924/022ac56e762a4d94a17c552a41583e23/FLAGb1917530c [2020-07-19 23:39:46,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10a0d924/022ac56e762a4d94a17c552a41583e23 [2020-07-19 23:39:46,903 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:39:46,906 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:39:46,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:39:46,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:39:46,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:39:46,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:39:46" (1/1) ... [2020-07-19 23:39:46,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e517502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:46, skipping insertion in model container [2020-07-19 23:39:46,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:39:46" (1/1) ... [2020-07-19 23:39:46,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:39:46,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:39:47,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:39:47,202 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:39:47,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:39:47,267 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:39:47,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47 WrapperNode [2020-07-19 23:39:47,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:39:47,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:39:47,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:39:47,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:39:47,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (1/1) ... [2020-07-19 23:39:47,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (1/1) ... [2020-07-19 23:39:47,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (1/1) ... [2020-07-19 23:39:47,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (1/1) ... [2020-07-19 23:39:47,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (1/1) ... [2020-07-19 23:39:47,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (1/1) ... [2020-07-19 23:39:47,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (1/1) ... [2020-07-19 23:39:47,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:39:47,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:39:47,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:39:47,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:39:47,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (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 [2020-07-19 23:39:47,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:39:47,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:39:47,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:39:47,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:39:47,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:39:47,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:39:47,536 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:39:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:39:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:39:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-19 23:39:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:39:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:39:47,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:39:47,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:39:47,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:39:47,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:39:47,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:39:47,993 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:39:47,993 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-19 23:39:47,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:39:47 BoogieIcfgContainer [2020-07-19 23:39:47,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:39:48,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:39:48,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:39:48,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:39:48,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:39:46" (1/3) ... [2020-07-19 23:39:48,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41514cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:39:48, skipping insertion in model container [2020-07-19 23:39:48,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:39:47" (2/3) ... [2020-07-19 23:39:48,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41514cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:39:48, skipping insertion in model container [2020-07-19 23:39:48,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:39:47" (3/3) ... [2020-07-19 23:39:48,009 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-19 23:39:48,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:39:48,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:39:48,043 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:39:48,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:39:48,067 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:39:48,067 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:39:48,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:39:48,068 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:39:48,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:39:48,068 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:39:48,068 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:39:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-19 23:39:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:39:48,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:48,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:48,100 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:48,106 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-19 23:39:48,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:48,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035991929] [2020-07-19 23:39:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:39:48,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035991929] [2020-07-19 23:39:48,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:39:48,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:39:48,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177843623] [2020-07-19 23:39:48,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:39:48,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:48,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:39:48,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:39:48,368 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 4 states. [2020-07-19 23:39:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:48,559 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2020-07-19 23:39:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:39:48,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-19 23:39:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:48,573 INFO L225 Difference]: With dead ends: 73 [2020-07-19 23:39:48,573 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:39:48,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:39:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:39:48,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-19 23:39:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:39:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-19 23:39:48,623 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2020-07-19 23:39:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:48,624 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-19 23:39:48,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:39:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-19 23:39:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:39:48,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:48,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:48,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:39:48,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:48,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-19 23:39:48,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:48,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225840199] [2020-07-19 23:39:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:39:48,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225840199] [2020-07-19 23:39:48,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460029571] [2020-07-19 23:39:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bbed252 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:48,778 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4bbed252 issued 3 check-sat command(s) [2020-07-19 23:39:48,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 23:39:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:39:48,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:39:48,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 23:39:48,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735477846] [2020-07-19 23:39:48,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:39:48,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:48,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:39:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:39:48,834 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-19 23:39:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:48,969 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-19 23:39:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:39:48,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-19 23:39:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:48,971 INFO L225 Difference]: With dead ends: 65 [2020-07-19 23:39:48,972 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 23:39:48,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:39:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 23:39:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-07-19 23:39:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 23:39:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-19 23:39:48,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2020-07-19 23:39:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:49,000 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-19 23:39:49,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:39:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-19 23:39:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 23:39:49,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:49,002 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:49,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:39:49,216 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1067646812, now seen corresponding path program 2 times [2020-07-19 23:39:49,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:49,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689505578] [2020-07-19 23:39:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:39:49,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689505578] [2020-07-19 23:39:49,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587745745] [2020-07-19 23:39:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d1a4445 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 [2020-07-19 23:39:49,378 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d1a4445 issued 3 check-sat command(s) [2020-07-19 23:39:49,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 23:39:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:39:49,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:39:49,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 23:39:49,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031187293] [2020-07-19 23:39:49,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:39:49,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:39:49,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:39:49,402 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-07-19 23:39:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:49,539 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-07-19 23:39:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:39:49,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-07-19 23:39:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:49,541 INFO L225 Difference]: With dead ends: 75 [2020-07-19 23:39:49,541 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 23:39:49,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:39:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 23:39:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2020-07-19 23:39:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-19 23:39:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-07-19 23:39:49,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2020-07-19 23:39:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:49,550 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-07-19 23:39:49,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:39:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-07-19 23:39:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 23:39:49,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:49,551 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:49,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:49,765 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1245957476, now seen corresponding path program 3 times [2020-07-19 23:39:49,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:49,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988707622] [2020-07-19 23:39:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-19 23:39:49,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988707622] [2020-07-19 23:39:49,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012587356] [2020-07-19 23:39:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5987d217 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:49,987 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5987d217 issued 3 check-sat command(s) [2020-07-19 23:39:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 23:39:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-19 23:39:50,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:39:50,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 23:39:50,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272436170] [2020-07-19 23:39:50,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:39:50,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:39:50,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:39:50,012 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2020-07-19 23:39:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:50,150 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-07-19 23:39:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:39:50,151 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-07-19 23:39:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:50,152 INFO L225 Difference]: With dead ends: 85 [2020-07-19 23:39:50,153 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:39:50,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:39:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:39:50,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-19 23:39:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:39:50,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-19 23:39:50,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-07-19 23:39:50,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:50,165 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-19 23:39:50,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:39:50,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-19 23:39:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:39:50,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:50,167 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:50,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:50,382 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 4 times [2020-07-19 23:39:50,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:50,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173160344] [2020-07-19 23:39:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 23:39:50,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173160344] [2020-07-19 23:39:50,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434376402] [2020-07-19 23:39:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7765d7ce No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:50,601 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7765d7ce issued 3 check-sat command(s) [2020-07-19 23:39:50,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:50,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:39:50,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-19 23:39:50,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:39:50,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-19 23:39:50,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919599658] [2020-07-19 23:39:50,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:39:50,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:50,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:39:50,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:39:50,629 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 9 states. [2020-07-19 23:39:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:50,799 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-19 23:39:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:39:50,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-07-19 23:39:50,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:50,801 INFO L225 Difference]: With dead ends: 93 [2020-07-19 23:39:50,801 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:39:50,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:39:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:39:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-19 23:39:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 23:39:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-19 23:39:50,810 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-07-19 23:39:50,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:50,810 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-19 23:39:50,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:39:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-19 23:39:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-19 23:39:50,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:50,812 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:51,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:51,024 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:51,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 5 times [2020-07-19 23:39:51,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:51,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924419982] [2020-07-19 23:39:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-19 23:39:51,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924419982] [2020-07-19 23:39:51,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:39:51,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 23:39:51,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570157047] [2020-07-19 23:39:51,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:39:51,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:51,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:39:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:39:51,174 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-07-19 23:39:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:51,301 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-19 23:39:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:39:51,302 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-07-19 23:39:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:51,303 INFO L225 Difference]: With dead ends: 62 [2020-07-19 23:39:51,304 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:39:51,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:39:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:39:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 23:39:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:39:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-19 23:39:51,311 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-07-19 23:39:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:51,311 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-19 23:39:51,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:39:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-19 23:39:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 23:39:51,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:51,313 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:51,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 23:39:51,313 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash -637010121, now seen corresponding path program 1 times [2020-07-19 23:39:51,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:51,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548477469] [2020-07-19 23:39:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-19 23:39:51,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548477469] [2020-07-19 23:39:51,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058901558] [2020-07-19 23:39:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e13a19 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:51,660 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43e13a19 issued 4 check-sat command(s) [2020-07-19 23:39:51,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:51,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:39:51,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:51,710 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:39:51,714 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:39:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-19 23:39:51,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:39:51,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2020-07-19 23:39:51,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189731069] [2020-07-19 23:39:51,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:39:51,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:51,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:39:51,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:39:51,743 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-07-19 23:39:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:51,837 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-07-19 23:39:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:39:51,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-19 23:39:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:51,839 INFO L225 Difference]: With dead ends: 56 [2020-07-19 23:39:51,839 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 23:39:51,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:39:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 23:39:51,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-19 23:39:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 23:39:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-07-19 23:39:51,847 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2020-07-19 23:39:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:51,848 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-07-19 23:39:51,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:39:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-07-19 23:39:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 23:39:51,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:51,850 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:52,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:39:52,063 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:52,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1604149734, now seen corresponding path program 1 times [2020-07-19 23:39:52,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:52,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684745606] [2020-07-19 23:39:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 23:39:52,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684745606] [2020-07-19 23:39:52,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:39:52,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:39:52,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409624874] [2020-07-19 23:39:52,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:39:52,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:52,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:39:52,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:39:52,168 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-07-19 23:39:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:52,247 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-07-19 23:39:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:39:52,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-07-19 23:39:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:52,249 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:39:52,250 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 23:39:52,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:39:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 23:39:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 23:39:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:39:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-07-19 23:39:52,257 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-07-19 23:39:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:52,258 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-07-19 23:39:52,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:39:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-07-19 23:39:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 23:39:52,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:52,260 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:52,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 23:39:52,260 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash 855134175, now seen corresponding path program 1 times [2020-07-19 23:39:52,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:52,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120111229] [2020-07-19 23:39:52,262 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 23:39:52,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120111229] [2020-07-19 23:39:52,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399674165] [2020-07-19 23:39:52,386 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61e576b1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:52,529 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61e576b1 issued 4 check-sat command(s) [2020-07-19 23:39:52,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:39:52,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:52,606 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:39:52,609 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:39:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 23:39:52,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:39:52,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-07-19 23:39:52,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865364581] [2020-07-19 23:39:52,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:39:52,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:39:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:39:52,648 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 15 states. [2020-07-19 23:39:52,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:52,826 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-07-19 23:39:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:39:52,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-07-19 23:39:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:52,828 INFO L225 Difference]: With dead ends: 70 [2020-07-19 23:39:52,828 INFO L226 Difference]: Without dead ends: 53 [2020-07-19 23:39:52,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:39:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-19 23:39:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-19 23:39:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 23:39:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-07-19 23:39:52,836 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 50 [2020-07-19 23:39:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:52,836 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-07-19 23:39:52,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:39:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-07-19 23:39:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 23:39:52,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:39:52,838 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:39:53,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:53,051 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:39:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:39:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1926047290, now seen corresponding path program 2 times [2020-07-19 23:39:53,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:39:53,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324548772] [2020-07-19 23:39:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@633d7723 [2020-07-19 23:39:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:39:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-19 23:39:53,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324548772] [2020-07-19 23:39:53,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204596233] [2020-07-19 23:39:53,225 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38dc2783 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:39:53,420 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@38dc2783 issued 4 check-sat command(s) [2020-07-19 23:39:53,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:39:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 23:39:53,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:39:53,460 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-07-19 23:39:53,460 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:39:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-19 23:39:53,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:39:53,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2020-07-19 23:39:53,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101835026] [2020-07-19 23:39:53,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:39:53,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:39:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:39:53,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:39:53,491 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 5 states. [2020-07-19 23:39:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:39:53,516 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-07-19 23:39:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:39:53,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-07-19 23:39:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:39:53,517 INFO L225 Difference]: With dead ends: 53 [2020-07-19 23:39:53,517 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:39:53,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:39:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:39:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:39:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:39:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:39:53,520 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 52 [2020-07-19 23:39:53,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:39:53,520 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:39:53,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:39:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:39:53,521 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:39:53,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 23:39:53,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:39:53,851 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:39:53,852 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2020-07-19 23:39:53,852 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:39:53,852 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:39:53,852 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:39:53,852 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:39:53,852 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:39:53,852 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-19 23:39:53,852 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-19 23:39:53,853 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-19 23:39:53,853 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-19 23:39:53,853 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (and (<= 0 main_~nc_B~0) (= 0 main_~found~0)) [2020-07-19 23:39:53,853 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-07-19 23:39:53,853 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-07-19 23:39:53,853 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (= 0 main_~found~0) [2020-07-19 23:39:53,853 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-07-19 23:39:53,854 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-07-19 23:39:53,854 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-19 23:39:53,854 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (or (and (<= 1 main_~nc_B~0) (= 0 main_~found~0)) (and (= 0 main_~nc_B~0) (<= 0 main_~j~0))) [2020-07-19 23:39:53,854 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-19 23:39:53,854 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-19 23:39:53,855 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= 1 main_~found~0))) (or (and (or .cse0 (= 0 main_~found~0)) (<= 1 main_~nc_B~0)) (and .cse0 (= 0 main_~nc_B~0) (<= 0 main_~j~0)))) [2020-07-19 23:39:53,855 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-07-19 23:39:53,855 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-07-19 23:39:53,855 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-07-19 23:39:53,855 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: (= |#valid| |old(#valid)|) [2020-07-19 23:39:53,855 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-07-19 23:39:53,855 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (= 0 main_~found~0) [2020-07-19 23:39:53,856 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-07-19 23:39:53,856 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-07-19 23:39:53,856 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (= 0 main_~found~0) [2020-07-19 23:39:53,856 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-07-19 23:39:53,856 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-07-19 23:39:53,856 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-19 23:39:53,856 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-19 23:39:53,856 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-19 23:39:53,857 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-19 23:39:53,857 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-19 23:39:53,857 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-19 23:39:53,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:39:53 BoogieIcfgContainer [2020-07-19 23:39:53,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:39:53,877 INFO L168 Benchmark]: Toolchain (without parser) took 6971.59 ms. Allocated memory was 147.3 MB in the beginning and 268.4 MB in the end (delta: 121.1 MB). Free memory was 104.1 MB in the beginning and 208.4 MB in the end (delta: -104.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:39:53,878 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:39:53,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.48 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 93.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-19 23:39:53,880 INFO L168 Benchmark]: Boogie Preprocessor took 187.86 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 93.0 MB in the beginning and 182.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:39:53,881 INFO L168 Benchmark]: RCFGBuilder took 540.39 ms. Allocated memory is still 205.0 MB. Free memory was 182.1 MB in the beginning and 162.8 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-07-19 23:39:53,882 INFO L168 Benchmark]: TraceAbstraction took 5874.74 ms. Allocated memory was 205.0 MB in the beginning and 268.4 MB in the end (delta: 63.4 MB). Free memory was 162.8 MB in the beginning and 208.4 MB in the end (delta: -45.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:39:53,886 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.3 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 361.48 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 93.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 187.86 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 93.0 MB in the beginning and 182.1 MB in the end (delta: -89.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 540.39 ms. Allocated memory is still 205.0 MB. Free memory was 182.1 MB in the beginning and 162.8 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5874.74 ms. Allocated memory was 205.0 MB in the beginning and 268.4 MB in the end (delta: 63.4 MB). Free memory was 162.8 MB in the beginning and 208.4 MB in the end (delta: -45.6 MB). Peak memory consumption was 17.9 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: 31]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (1 <= nc_B && 0 == found) || (0 == nc_B && 0 <= j) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 <= nc_B && 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.6s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 257 SDtfs, 187 SDslu, 671 SDs, 0 SdLazy, 730 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 371 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=9, 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, 10 MinimizatonAttempts, 69 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 22 PreInvPairs, 50 NumberOfFragments, 69 HoareAnnotationTreeSize, 22 FomulaSimplifications, 327 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 54 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 682 NumberOfCodeBlocks, 648 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 665 ConstructedInterpolants, 0 QuantifiedInterpolants, 44747 SizeOfPredicates, 16 NumberOfNonLiveVariables, 875 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 484/555 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...