/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.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 06:10:48,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 06:10:48,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 06:10:48,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 06:10:48,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 06:10:48,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 06:10:48,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 06:10:48,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 06:10:48,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 06:10:48,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 06:10:48,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 06:10:48,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 06:10:48,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 06:10:48,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 06:10:48,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 06:10:48,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 06:10:48,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 06:10:48,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 06:10:48,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 06:10:48,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 06:10:48,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 06:10:48,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 06:10:48,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 06:10:48,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 06:10:48,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 06:10:48,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 06:10:48,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 06:10:48,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 06:10:48,286 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 06:10:48,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 06:10:48,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 06:10:48,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 06:10:48,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 06:10:48,312 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 06:10:48,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 06:10:48,313 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 06:10:48,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 06:10:48,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 06:10:48,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 06:10:48,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 06:10:48,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 06:10:48,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 06:10:48,316 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 06:10:48,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 06:10:48,316 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 06:10:48,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 06:10:48,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 06:10:48,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 06:10:48,317 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 06:10:48,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 06:10:48,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 06:10:48,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 06:10:48,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 06:10:48,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 06:10:48,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 06:10:48,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 06:10:48,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 06:10:48,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 06:10:48,319 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 06:10:48,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 06:10:48,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 06:10:48,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 06:10:48,610 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 06:10:48,611 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 06:10:48,612 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-07-20 06:10:48,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81dc1bb8/baa49aa618dc4635ab9bab8be69e760e/FLAG42deec82c [2020-07-20 06:10:49,150 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 06:10:49,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-07-20 06:10:49,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81dc1bb8/baa49aa618dc4635ab9bab8be69e760e/FLAG42deec82c [2020-07-20 06:10:49,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81dc1bb8/baa49aa618dc4635ab9bab8be69e760e [2020-07-20 06:10:49,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 06:10:49,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 06:10:49,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:49,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 06:10:49,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 06:10:49,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a36400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49, skipping insertion in model container [2020-07-20 06:10:49,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 06:10:49,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 06:10:49,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:49,754 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 06:10:49,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 06:10:49,785 INFO L208 MainTranslator]: Completed translation [2020-07-20 06:10:49,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49 WrapperNode [2020-07-20 06:10:49,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 06:10:49,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 06:10:49,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 06:10:49,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 06:10:49,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (1/1) ... [2020-07-20 06:10:49,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 06:10:49,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 06:10:49,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 06:10:49,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 06:10:49,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (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 06:10:49,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 06:10:49,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 06:10:49,967 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 06:10:49,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 06:10:49,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 06:10:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 06:10:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 06:10:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 06:10:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 06:10:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 06:10:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 06:10:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 06:10:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 06:10:50,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 06:10:50,155 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 06:10:50,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:50 BoogieIcfgContainer [2020-07-20 06:10:50,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 06:10:50,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 06:10:50,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 06:10:50,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 06:10:50,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:10:49" (1/3) ... [2020-07-20 06:10:50,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea06ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:50, skipping insertion in model container [2020-07-20 06:10:50,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:10:49" (2/3) ... [2020-07-20 06:10:50,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea06ccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:10:50, skipping insertion in model container [2020-07-20 06:10:50,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:10:50" (3/3) ... [2020-07-20 06:10:50,167 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-07-20 06:10:50,177 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 06:10:50,186 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 06:10:50,201 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 06:10:50,225 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 06:10:50,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 06:10:50,226 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 06:10:50,226 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 06:10:50,226 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 06:10:50,226 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 06:10:50,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 06:10:50,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 06:10:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-20 06:10:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 06:10:50,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:50,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:50,253 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-07-20 06:10:50,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:50,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484460646] [2020-07-20 06:10:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d35a2c [2020-07-20 06:10:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:50,419 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 06:10:50,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484460646] [2020-07-20 06:10:50,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:10:50,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 06:10:50,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739402563] [2020-07-20 06:10:50,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 06:10:50,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:50,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 06:10:50,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:10:50,445 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-07-20 06:10:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:50,483 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-07-20 06:10:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 06:10:50,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-20 06:10:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:50,513 INFO L225 Difference]: With dead ends: 34 [2020-07-20 06:10:50,513 INFO L226 Difference]: Without dead ends: 13 [2020-07-20 06:10:50,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 06:10:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-20 06:10:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-20 06:10:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-20 06:10:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-07-20 06:10:50,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-07-20 06:10:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:50,627 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-07-20 06:10:50,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 06:10:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-07-20 06:10:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 06:10:50,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:50,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:50,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 06:10:50,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-07-20 06:10:50,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:50,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367027189] [2020-07-20 06:10:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d35a2c [2020-07-20 06:10:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:50,863 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 06:10:50,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367027189] [2020-07-20 06:10:50,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301493809] [2020-07-20 06:10:50,866 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17eaed38 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:50,915 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17eaed38 issued 4 check-sat command(s) [2020-07-20 06:10:50,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 06:10:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:50,955 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:50,995 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 06:10:50,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:50,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 06:10:50,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866137526] [2020-07-20 06:10:50,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 06:10:50,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:50,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 06:10:50,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-07-20 06:10:50,999 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2020-07-20 06:10:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:51,082 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-20 06:10:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 06:10:51,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-07-20 06:10:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:51,084 INFO L225 Difference]: With dead ends: 19 [2020-07-20 06:10:51,084 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 06:10:51,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:10:51,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 06:10:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 06:10:51,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 06:10:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 06:10:51,090 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 06:10:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:51,091 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 06:10:51,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 06:10:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 06:10:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 06:10:51,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:51,092 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:51,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 06:10:51,294 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1105094223, now seen corresponding path program 2 times [2020-07-20 06:10:51,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:51,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894088105] [2020-07-20 06:10:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d35a2c [2020-07-20 06:10:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:51,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894088105] [2020-07-20 06:10:51,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042220111] [2020-07-20 06:10:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4191f31d 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 06:10:51,434 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4191f31d issued 3 check-sat command(s) [2020-07-20 06:10:51,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:51,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 06:10:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:51,462 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:51,493 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 06:10:51,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:51,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 06:10:51,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818360368] [2020-07-20 06:10:51,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 06:10:51,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:51,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 06:10:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-20 06:10:51,496 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-07-20 06:10:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:51,569 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-07-20 06:10:51,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 06:10:51,570 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-07-20 06:10:51,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:51,571 INFO L225 Difference]: With dead ends: 20 [2020-07-20 06:10:51,571 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 06:10:51,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-07-20 06:10:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 06:10:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 06:10:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 06:10:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 06:10:51,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-07-20 06:10:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:51,577 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 06:10:51,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 06:10:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 06:10:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 06:10:51,578 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:51,578 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:51,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:51,792 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:51,792 INFO L82 PathProgramCache]: Analyzing trace with hash -66279700, now seen corresponding path program 3 times [2020-07-20 06:10:51,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:51,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578915890] [2020-07-20 06:10:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d35a2c [2020-07-20 06:10:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:51,922 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 06:10:51,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578915890] [2020-07-20 06:10:51,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501362359] [2020-07-20 06:10:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a484acf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:51,954 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a484acf issued 4 check-sat command(s) [2020-07-20 06:10:51,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 06:10:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:10:51,992 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:10:52,024 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 06:10:52,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:10:52,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-20 06:10:52,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564358346] [2020-07-20 06:10:52,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 06:10:52,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:10:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 06:10:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-07-20 06:10:52,027 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 11 states. [2020-07-20 06:10:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:10:52,100 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-20 06:10:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 06:10:52,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-07-20 06:10:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:10:52,101 INFO L225 Difference]: With dead ends: 21 [2020-07-20 06:10:52,101 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 06:10:52,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-07-20 06:10:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 06:10:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 06:10:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 06:10:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-20 06:10:52,106 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-07-20 06:10:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:10:52,107 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-20 06:10:52,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 06:10:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-20 06:10:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 06:10:52,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:10:52,108 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:10:52,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:10:52,320 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:10:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:10:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash -2019132945, now seen corresponding path program 4 times [2020-07-20 06:10:52,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:10:52,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873427065] [2020-07-20 06:10:52,321 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d35a2c [2020-07-20 06:10:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:10:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:10:52,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873427065] [2020-07-20 06:10:52,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418209815] [2020-07-20 06:10:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa84313 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 [2020-07-20 06:10:52,452 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5fa84313 issued 4 check-sat command(s) [2020-07-20 06:10:52,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:10:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 06:10:52,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:04,771 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:11:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:11:04,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:04,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2020-07-20 06:11:04,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100444646] [2020-07-20 06:11:04,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 06:11:04,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:04,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 06:11:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=147, Unknown=6, NotChecked=0, Total=182 [2020-07-20 06:11:04,829 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2020-07-20 06:11:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:04,986 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-20 06:11:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 06:11:04,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 06:11:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:04,989 INFO L225 Difference]: With dead ends: 22 [2020-07-20 06:11:04,989 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 06:11:04,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=40, Invalid=194, Unknown=6, NotChecked=0, Total=240 [2020-07-20 06:11:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 06:11:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 06:11:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 06:11:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 06:11:04,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-07-20 06:11:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:04,999 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 06:11:04,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 06:11:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 06:11:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 06:11:05,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:05,000 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:11:05,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:05,201 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1866925900, now seen corresponding path program 5 times [2020-07-20 06:11:05,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:05,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972188971] [2020-07-20 06:11:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d35a2c [2020-07-20 06:11:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:11:05,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972188971] [2020-07-20 06:11:05,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648063035] [2020-07-20 06:11:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22cb1443 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:11:05,378 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22cb1443 issued 4 check-sat command(s) [2020-07-20 06:11:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:11:05,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 06:11:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:11:17,805 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 06:11:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:11:17,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:11:17,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2020-07-20 06:11:17,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116191198] [2020-07-20 06:11:17,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 06:11:17,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:17,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 06:11:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=200, Unknown=6, NotChecked=0, Total=240 [2020-07-20 06:11:17,888 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2020-07-20 06:11:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:18,097 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-07-20 06:11:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 06:11:18,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-07-20 06:11:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:18,099 INFO L225 Difference]: With dead ends: 23 [2020-07-20 06:11:18,100 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 06:11:18,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=45, Invalid=255, Unknown=6, NotChecked=0, Total=306 [2020-07-20 06:11:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 06:11:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 06:11:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 06:11:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-07-20 06:11:18,106 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-07-20 06:11:18,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:18,106 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-07-20 06:11:18,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 06:11:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-07-20 06:11:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 06:11:18,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:11:18,108 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:11:18,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 06:11:18,310 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:11:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:11:18,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2075665807, now seen corresponding path program 6 times [2020-07-20 06:11:18,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:11:18,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557015685] [2020-07-20 06:11:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d35a2c [2020-07-20 06:11:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 06:11:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 06:11:18,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557015685] [2020-07-20 06:11:18,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 06:11:18,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 06:11:18,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836521368] [2020-07-20 06:11:18,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 06:11:18,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:11:18,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 06:11:18,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 06:11:18,381 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-07-20 06:11:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:11:18,448 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-07-20 06:11:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 06:11:18,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-20 06:11:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:11:18,449 INFO L225 Difference]: With dead ends: 18 [2020-07-20 06:11:18,449 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 06:11:18,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 06:11:18,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 06:11:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 06:11:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 06:11:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 06:11:18,450 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-07-20 06:11:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:11:18,451 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 06:11:18,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 06:11:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 06:11:18,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 06:11:18,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 06:11:18,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 06:11:41,773 WARN L193 SmtUtils]: Spent 23.27 s on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-07-20 06:11:41,790 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 06:11:41,790 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 06:11:41,790 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 06:11:41,790 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 06:11:41,790 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 06:11:41,790 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 06:11:41,790 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 06:11:41,791 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 06:11:41,791 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 06:11:41,791 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 06:11:41,791 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-07-20 06:11:41,791 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-07-20 06:11:41,791 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-20 06:11:41,791 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-07-20 06:11:41,792 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 2) main_~y~0)) [2020-07-20 06:11:41,792 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (or (and (exists ((v_main_~x~0_15 Int)) (and (<= (+ (div (+ (* main_~x~0 (- 1)) v_main_~x~0_15 (- 1)) (- 2)) 1) main_~y~0) (<= (+ (div (+ (* v_main_~x~0_15 (- 1)) (- 53)) (- 2)) 2) main_~y~0))) (<= 15 main_~y~0)) (and (<= 13 main_~y~0) (exists ((v_main_~x~0_21 Int) (v_main_~x~0_19 Int)) (and (<= (+ main_~x~0 1) (+ v_main_~x~0_21 main_~y~0)) (<= (+ (div (+ (* v_main_~x~0_19 (- 1)) (- 53)) (- 2)) 3) main_~y~0) (<= (+ (div (+ (* v_main_~x~0_21 (- 1)) v_main_~x~0_19 (- 1)) (- 2)) 2) main_~y~0)))) (and (<= 2 main_~y~0) (<= (+ main_~x~0 2) main_~y~0))) [2020-07-20 06:11:41,792 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-07-20 06:11:41,792 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 06:11:41,792 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 06:11:41,792 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 06:11:41,792 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 06:11:41,793 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 06:11:41,793 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 06:11:41,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:11:41 BoogieIcfgContainer [2020-07-20 06:11:41,811 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:11:41,813 INFO L168 Benchmark]: Toolchain (without parser) took 52276.40 ms. Allocated memory was 146.8 MB in the beginning and 242.2 MB in the end (delta: 95.4 MB). Free memory was 104.6 MB in the beginning and 182.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:11:41,814 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 06:11:41,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.85 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:11:41,816 INFO L168 Benchmark]: Boogie Preprocessor took 113.42 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 94.9 MB in the beginning and 184.4 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:11:41,817 INFO L168 Benchmark]: RCFGBuilder took 258.28 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 171.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:11:41,818 INFO L168 Benchmark]: TraceAbstraction took 51651.43 ms. Allocated memory was 205.0 MB in the beginning and 242.2 MB in the end (delta: 37.2 MB). Free memory was 170.8 MB in the beginning and 182.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:11:41,823 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.85 ms. Allocated memory is still 146.8 MB. Free memory was 104.2 MB in the beginning and 94.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.42 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 94.9 MB in the beginning and 184.4 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.28 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 171.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51651.43 ms. Allocated memory was 205.0 MB in the beginning and 242.2 MB in the end (delta: 37.2 MB). Free memory was 170.8 MB in the beginning and 182.7 MB in the end (delta: -11.9 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 18]: Loop Invariant Derived loop invariant: x + 50 <= 0 || x + 2 <= y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.2s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 23.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 19 SDslu, 324 SDs, 0 SdLazy, 319 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 25.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 25 NumberOfFragments, 91 HoareAnnotationTreeSize, 13 FomulaSimplifications, 171 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 31 FormulaSimplificationTreeSizeReductionInter, 23.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 25.7s InterpolantComputationTime, 168 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 156 ConstructedInterpolants, 5 QuantifiedInterpolants, 7762 SizeOfPredicates, 15 NumberOfNonLiveVariables, 214 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 21/91 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...