/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/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:43:17,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:43:17,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:43:17,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:43:17,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:43:17,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:43:17,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:43:17,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:43:17,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:43:17,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:43:17,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:43:17,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:43:17,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:43:17,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:43:17,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:43:17,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:43:17,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:43:17,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:43:17,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:43:17,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:43:17,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:43:17,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:43:17,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:43:17,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:43:17,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:43:17,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:43:17,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:43:17,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:43:17,303 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 23:43:17,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:43:17,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:43:17,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:43:17,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:43:17,320 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:43:17,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:43:17,320 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:43:17,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:43:17,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:43:17,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:43:17,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:43:17,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:43:17,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:43:17,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:43:17,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:43:17,322 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:43:17,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:43:17,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:43:17,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:43:17,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:43:17,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:43:17,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:43:17,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:43:17,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:43:17,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:43:17,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:43:17,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:43:17,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:43:17,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:43:17,324 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 23:43:17,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:43:17,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:43:17,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:43:17,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:43:17,607 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:43:17,608 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-19 23:43:17,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/339f42f5c/81183e0617f8443a94d66fda2ceb561f/FLAGc67e423e2 [2020-07-19 23:43:18,102 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:43:18,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-07-19 23:43:18,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/339f42f5c/81183e0617f8443a94d66fda2ceb561f/FLAGc67e423e2 [2020-07-19 23:43:18,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/339f42f5c/81183e0617f8443a94d66fda2ceb561f [2020-07-19 23:43:18,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:43:18,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:43:18,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:43:18,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:43:18,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:43:18,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cbcbbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18, skipping insertion in model container [2020-07-19 23:43:18,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:43:18,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:43:18,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:43:18,795 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:43:18,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:43:18,829 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:43:18,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18 WrapperNode [2020-07-19 23:43:18,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:43:18,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:43:18,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:43:18,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:43:18,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (1/1) ... [2020-07-19 23:43:18,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:43:18,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:43:18,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:43:18,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:43:18,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (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 23:43:19,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:43:19,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:43:19,011 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 23:43:19,011 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 23:43:19,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:43:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:43:19,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 23:43:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 23:43:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 23:43:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:43:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:43:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:43:19,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:43:19,259 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:43:19,259 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 23:43:19,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:43:19 BoogieIcfgContainer [2020-07-19 23:43:19,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:43:19,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:43:19,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:43:19,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:43:19,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:43:18" (1/3) ... [2020-07-19 23:43:19,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1675e35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:43:19, skipping insertion in model container [2020-07-19 23:43:19,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:43:18" (2/3) ... [2020-07-19 23:43:19,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1675e35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:43:19, skipping insertion in model container [2020-07-19 23:43:19,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:43:19" (3/3) ... [2020-07-19 23:43:19,271 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-07-19 23:43:19,282 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:43:19,289 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:43:19,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:43:19,334 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:43:19,334 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:43:19,335 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:43:19,335 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:43:19,335 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:43:19,335 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:43:19,335 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:43:19,336 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:43:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-19 23:43:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 23:43:19,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:19,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:19,377 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1671060194, now seen corresponding path program 1 times [2020-07-19 23:43:19,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:19,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198542513] [2020-07-19 23:43:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e56b52c [2020-07-19 23:43:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:19,702 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 23:43:19,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198542513] [2020-07-19 23:43:19,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:43:19,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 23:43:19,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665020902] [2020-07-19 23:43:19,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:43:19,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:19,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:43:19,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:43:19,728 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 8 states. [2020-07-19 23:43:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:20,131 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2020-07-19 23:43:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:43:20,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-19 23:43:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:20,144 INFO L225 Difference]: With dead ends: 68 [2020-07-19 23:43:20,144 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:43:20,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:43:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:43:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-19 23:43:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:43:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-19 23:43:20,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2020-07-19 23:43:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:20,198 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-19 23:43:20,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:43:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-19 23:43:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 23:43:20,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:20,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:20,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:43:20,201 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:20,202 INFO L82 PathProgramCache]: Analyzing trace with hash -764881689, now seen corresponding path program 1 times [2020-07-19 23:43:20,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:20,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349891141] [2020-07-19 23:43:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e56b52c [2020-07-19 23:43:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 23:43:20,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349891141] [2020-07-19 23:43:20,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:43:20,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:43:20,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382377972] [2020-07-19 23:43:20,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:43:20,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:43:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:43:20,326 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 6 states. [2020-07-19 23:43:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:20,516 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-07-19 23:43:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:43:20,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-19 23:43:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:20,521 INFO L225 Difference]: With dead ends: 57 [2020-07-19 23:43:20,521 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 23:43:20,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:43:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 23:43:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-07-19 23:43:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 23:43:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-19 23:43:20,533 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 25 [2020-07-19 23:43:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:20,533 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-19 23:43:20,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:43:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-19 23:43:20,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:43:20,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:20,535 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] [2020-07-19 23:43:20,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:43:20,535 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1134636734, now seen corresponding path program 1 times [2020-07-19 23:43:20,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:20,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38712052] [2020-07-19 23:43:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e56b52c [2020-07-19 23:43:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:20,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38712052] [2020-07-19 23:43:20,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070020252] [2020-07-19 23:43:20,636 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77973a38 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 23:43:20,693 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77973a38 issued 4 check-sat command(s) [2020-07-19 23:43:20,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:20,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:43:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:43:20,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-19 23:43:20,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 11 [2020-07-19 23:43:20,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702566355] [2020-07-19 23:43:20,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:43:20,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:43:20,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:43:20,822 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2020-07-19 23:43:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:21,006 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-07-19 23:43:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:43:21,007 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-07-19 23:43:21,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:21,010 INFO L225 Difference]: With dead ends: 74 [2020-07-19 23:43:21,010 INFO L226 Difference]: Without dead ends: 55 [2020-07-19 23:43:21,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:43:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-19 23:43:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-07-19 23:43:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-19 23:43:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-19 23:43:21,036 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 28 [2020-07-19 23:43:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:21,036 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-19 23:43:21,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:43:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-19 23:43:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 23:43:21,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:21,041 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:21,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:43:21,257 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:21,258 INFO L82 PathProgramCache]: Analyzing trace with hash 848296232, now seen corresponding path program 1 times [2020-07-19 23:43:21,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:21,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571893559] [2020-07-19 23:43:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e56b52c [2020-07-19 23:43:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:43:21,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571893559] [2020-07-19 23:43:21,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:43:21,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:43:21,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262424323] [2020-07-19 23:43:21,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:43:21,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:43:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:43:21,340 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2020-07-19 23:43:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:21,419 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2020-07-19 23:43:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:43:21,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-19 23:43:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:21,421 INFO L225 Difference]: With dead ends: 75 [2020-07-19 23:43:21,421 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:43:21,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:43:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:43:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 23:43:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:43:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-07-19 23:43:21,431 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2020-07-19 23:43:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:21,432 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-07-19 23:43:21,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:43:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-07-19 23:43:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-19 23:43:21,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:43:21,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:43:21,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-19 23:43:21,434 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:43:21,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:43:21,435 INFO L82 PathProgramCache]: Analyzing trace with hash -670641491, now seen corresponding path program 2 times [2020-07-19 23:43:21,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:43:21,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881894107] [2020-07-19 23:43:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e56b52c [2020-07-19 23:43:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:43:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:43:21,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881894107] [2020-07-19 23:43:21,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559216570] [2020-07-19 23:43:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@325f10aa 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 23:43:21,645 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@325f10aa issued 4 check-sat command(s) [2020-07-19 23:43:21,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:43:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:43:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:43:21,763 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:43:21,767 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:43:21,769 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 23:43:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-19 23:43:21,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:43:21,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-07-19 23:43:21,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061831152] [2020-07-19 23:43:21,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:43:21,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:43:21,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:43:21,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:43:21,819 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 17 states. [2020-07-19 23:43:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:43:22,479 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-07-19 23:43:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:43:22,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-07-19 23:43:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:43:22,480 INFO L225 Difference]: With dead ends: 96 [2020-07-19 23:43:22,480 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 23:43:22,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2020-07-19 23:43:22,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 23:43:22,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 23:43:22,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 23:43:22,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 23:43:22,483 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-07-19 23:43:22,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:43:22,484 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 23:43:22,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:43:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 23:43:22,484 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 23:43:22,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:43:22,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 23:43:22,965 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-07-19 23:43:23,181 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:43:23,181 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) [2020-07-19 23:43:23,181 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:43:23,182 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 23:43:23,182 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 23:43:23,182 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 23:43:23,182 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 23:43:23,182 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-19 23:43:23,182 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-19 23:43:23,182 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-19 23:43:23,183 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-19 23:43:23,183 INFO L271 CegarLoopResult]: At program point L27(lines 14 29) the Hoare annotation is: true [2020-07-19 23:43:23,183 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 29) no Hoare annotation was computed. [2020-07-19 23:43:23,183 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 26) no Hoare annotation was computed. [2020-07-19 23:43:23,191 INFO L264 CegarLoopResult]: At program point L23-3(lines 23 26) the Hoare annotation is: (let ((.cse0 (<= 0 main_~i~0))) (or (and (<= main_~i~0 0) .cse0) (and (<= 2 main_~n~0) .cse0) (and (<= main_~i~0 1) (<= 1 main_~i~0)))) [2020-07-19 23:43:23,191 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-07-19 23:43:23,191 INFO L268 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-07-19 23:43:23,191 INFO L264 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (and (<= 0 main_~i~0) (< main_~i~0 main_~n~0) (<= (* 2 main_~i~0) main_~j~0)) [2020-07-19 23:43:23,191 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-07-19 23:43:23,191 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (let ((.cse1 (<= (+ main_~j~0 3) (+ main_~i~0 (* 2 main_~n~0)))) (.cse2 (<= .cse0 main_~j~0))) (or (and (<= (div (* main_~j~0 (- 1)) (- 2)) main_~k~0) (<= main_~i~0 1) (<= main_~j~0 .cse0) .cse1 (<= 1 main_~i~0) .cse2) (and (<= 2 main_~i~0) (< main_~i~0 main_~n~0) .cse1 .cse2)))) [2020-07-19 23:43:23,192 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-07-19 23:43:23,192 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 29) no Hoare annotation was computed. [2020-07-19 23:43:23,192 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 29) the Hoare annotation is: true [2020-07-19 23:43:23,194 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (<= (+ main_~k~0 1) main_~j~0)) (.cse2 (<= (+ main_~j~0 3) (+ main_~i~0 (* 2 main_~n~0)))) (.cse1 (* 2 main_~i~0))) (or (and (<= (div (* main_~j~0 (- 1)) (- 2)) main_~k~0) .cse0 (<= main_~i~0 1) (<= main_~j~0 .cse1) .cse2) (and (<= 2 main_~i~0) (< main_~i~0 main_~n~0) .cse0 .cse2 (<= .cse1 main_~j~0)))) [2020-07-19 23:43:23,194 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 26) no Hoare annotation was computed. [2020-07-19 23:43:23,194 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-07-19 23:43:23,194 INFO L268 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-07-19 23:43:23,194 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-19 23:43:23,194 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-19 23:43:23,195 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-19 23:43:23,195 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-19 23:43:23,195 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-19 23:43:23,195 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-19 23:43:23,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:43:23 BoogieIcfgContainer [2020-07-19 23:43:23,221 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:43:23,225 INFO L168 Benchmark]: Toolchain (without parser) took 4689.93 ms. Allocated memory was 136.8 MB in the beginning and 250.6 MB in the end (delta: 113.8 MB). Free memory was 101.6 MB in the beginning and 187.8 MB in the end (delta: -86.2 MB). Peak memory consumption was 124.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:23,226 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:43:23,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.51 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:23,233 INFO L168 Benchmark]: Boogie Preprocessor took 115.50 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.7 MB in the beginning and 178.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:23,234 INFO L168 Benchmark]: RCFGBuilder took 314.54 ms. Allocated memory is still 200.3 MB. Free memory was 178.9 MB in the beginning and 164.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:23,235 INFO L168 Benchmark]: TraceAbstraction took 3956.60 ms. Allocated memory was 200.3 MB in the beginning and 250.6 MB in the end (delta: 50.3 MB). Free memory was 163.3 MB in the beginning and 187.8 MB in the end (delta: -24.5 MB). Peak memory consumption was 123.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:43:23,248 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 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.51 ms. Allocated memory is still 136.8 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.50 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 91.7 MB in the beginning and 178.9 MB in the end (delta: -87.3 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.54 ms. Allocated memory is still 200.3 MB. Free memory was 178.9 MB in the beginning and 164.0 MB in the end (delta: 15.0 MB). Peak memory consumption was 15.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3956.60 ms. Allocated memory was 200.3 MB in the beginning and 250.6 MB in the end (delta: 50.3 MB). Free memory was 163.3 MB in the beginning and 187.8 MB in the end (delta: -24.5 MB). Peak memory consumption was 123.1 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((((j * -1 / -2 <= k && i <= 1) && j <= 2 * i) && j + 3 <= i + 2 * n) && 1 <= i) && 2 * i <= j) || (((2 <= i && i < n) && j + 3 <= i + 2 * n) && 2 * i <= j) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((i <= 0 && 0 <= i) || (2 <= n && 0 <= i)) || (i <= 1 && 1 <= i) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (0 <= i && i < n) && 2 * i <= j - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 104 SDtfs, 203 SDslu, 243 SDs, 0 SdLazy, 675 SolverSat, 116 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=3, 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, 5 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 26 PreInvPairs, 62 NumberOfFragments, 154 HoareAnnotationTreeSize, 26 FomulaSimplifications, 1792 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 642 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 16750 SizeOfPredicates, 7 NumberOfNonLiveVariables, 162 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 66/88 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...