/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 DAGSIZE --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/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 04:01:53,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 04:01:53,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 04:01:53,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 04:01:53,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 04:01:53,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 04:01:53,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 04:01:53,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 04:01:53,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 04:01:53,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 04:01:53,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 04:01:53,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 04:01:53,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 04:01:53,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 04:01:53,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 04:01:53,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 04:01:53,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 04:01:53,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 04:01:53,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 04:01:53,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 04:01:53,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 04:01:53,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 04:01:53,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 04:01:53,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 04:01:53,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 04:01:53,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 04:01:53,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 04:01:53,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 04:01:53,339 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 04:01:53,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 04:01:53,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 04:01:53,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 04:01:53,382 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 04:01:53,382 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 04:01:53,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 04:01:53,383 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 04:01:53,383 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 04:01:53,383 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 04:01:53,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 04:01:53,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 04:01:53,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 04:01:53,384 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 04:01:53,384 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 04:01:53,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 04:01:53,384 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 04:01:53,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 04:01:53,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 04:01:53,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 04:01:53,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 04:01:53,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 04:01:53,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:01:53,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 04:01:53,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 04:01:53,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 04:01:53,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 04:01:53,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 04:01:53,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 04:01:53,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 04:01:53,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 04:01:53,700 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 04:01:53,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 04:01:53,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 04:01:53,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 04:01:53,720 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 04:01:53,720 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-07-20 04:01:53,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8c34078/ddb6204d6ad74565bac7f8f17f69a129/FLAGe03431e2c [2020-07-20 04:01:54,278 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 04:01:54,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-07-20 04:01:54,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8c34078/ddb6204d6ad74565bac7f8f17f69a129/FLAGe03431e2c [2020-07-20 04:01:54,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8c34078/ddb6204d6ad74565bac7f8f17f69a129 [2020-07-20 04:01:54,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 04:01:54,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 04:01:54,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 04:01:54,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 04:01:54,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 04:01:54,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9b76d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54, skipping insertion in model container [2020-07-20 04:01:54,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 04:01:54,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 04:01:54,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:01:54,880 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 04:01:54,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:01:54,912 INFO L208 MainTranslator]: Completed translation [2020-07-20 04:01:54,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54 WrapperNode [2020-07-20 04:01:54,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 04:01:54,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 04:01:54,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 04:01:54,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 04:01:54,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (1/1) ... [2020-07-20 04:01:54,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 04:01:54,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 04:01:54,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 04:01:54,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 04:01:54,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (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 04:01:55,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 04:01:55,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 04:01:55,101 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 04:01:55,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 04:01:55,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 04:01:55,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 04:01:55,101 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 04:01:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 04:01:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 04:01:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 04:01:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 04:01:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 04:01:55,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 04:01:55,292 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 04:01:55,293 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 04:01:55,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:01:55 BoogieIcfgContainer [2020-07-20 04:01:55,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 04:01:55,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 04:01:55,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 04:01:55,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 04:01:55,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:01:54" (1/3) ... [2020-07-20 04:01:55,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f0c738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:01:55, skipping insertion in model container [2020-07-20 04:01:55,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:01:54" (2/3) ... [2020-07-20 04:01:55,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f0c738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:01:55, skipping insertion in model container [2020-07-20 04:01:55,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:01:55" (3/3) ... [2020-07-20 04:01:55,305 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-07-20 04:01:55,318 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 04:01:55,326 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 04:01:55,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 04:01:55,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 04:01:55,376 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 04:01:55,376 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 04:01:55,376 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 04:01:55,376 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 04:01:55,376 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 04:01:55,376 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 04:01:55,377 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 04:01:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 04:01:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 04:01:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:55,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:55,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:55,439 INFO L82 PathProgramCache]: Analyzing trace with hash 508025261, now seen corresponding path program 1 times [2020-07-20 04:01:55,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:55,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557012013] [2020-07-20 04:01:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c4cdd75 [2020-07-20 04:01:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:55,667 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 04:01:55,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557012013] [2020-07-20 04:01:55,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:55,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:01:55,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556802861] [2020-07-20 04:01:55,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:01:55,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:55,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:01:55,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:01:55,688 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-20 04:01:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:55,785 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-07-20 04:01:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 04:01:55,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 04:01:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:55,795 INFO L225 Difference]: With dead ends: 46 [2020-07-20 04:01:55,795 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 04:01:55,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:55,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 04:01:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-07-20 04:01:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 04:01:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-20 04:01:55,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2020-07-20 04:01:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:55,843 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-20 04:01:55,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:01:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-20 04:01:55,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 04:01:55,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:55,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:55,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 04:01:55,846 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:55,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:55,846 INFO L82 PathProgramCache]: Analyzing trace with hash -133512762, now seen corresponding path program 1 times [2020-07-20 04:01:55,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:55,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212732483] [2020-07-20 04:01:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c4cdd75 [2020-07-20 04:01:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:55,929 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 04:01:55,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212732483] [2020-07-20 04:01:55,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206674866] [2020-07-20 04:01:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ee376b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:55,983 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ee376b issued 3 check-sat command(s) [2020-07-20 04:01:55,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:01:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 04:01:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:01:56,035 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:01:56,071 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 04:01:56,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:01:56,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 04:01:56,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628956231] [2020-07-20 04:01:56,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 04:01:56,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 04:01:56,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 04:01:56,077 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-07-20 04:01:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:56,147 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 04:01:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 04:01:56,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-07-20 04:01:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:56,151 INFO L225 Difference]: With dead ends: 30 [2020-07-20 04:01:56,151 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 04:01:56,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 04:01:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 04:01:56,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-07-20 04:01:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 04:01:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 04:01:56,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 04:01:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:56,160 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 04:01:56,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 04:01:56,160 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 04:01:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 04:01:56,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:56,161 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:56,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 04:01:56,375 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:56,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1022031800, now seen corresponding path program 1 times [2020-07-20 04:01:56,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:56,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607275992] [2020-07-20 04:01:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c4cdd75 [2020-07-20 04:01:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:56,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607275992] [2020-07-20 04:01:56,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:56,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 04:01:56,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713419310] [2020-07-20 04:01:56,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:01:56,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:56,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:01:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:56,502 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-07-20 04:01:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:56,603 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-20 04:01:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:01:56,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-07-20 04:01:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:56,606 INFO L225 Difference]: With dead ends: 31 [2020-07-20 04:01:56,606 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 04:01:56,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 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 04:01:56,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 04:01:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-07-20 04:01:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 04:01:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-07-20 04:01:56,619 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-07-20 04:01:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:56,620 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-07-20 04:01:56,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:01:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-07-20 04:01:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 04:01:56,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:56,622 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:56,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 04:01:56,623 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash 996292415, now seen corresponding path program 1 times [2020-07-20 04:01:56,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:56,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805166737] [2020-07-20 04:01:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c4cdd75 [2020-07-20 04:01:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:56,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805166737] [2020-07-20 04:01:56,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:01:56,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 04:01:56,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640609325] [2020-07-20 04:01:56,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:01:56,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:56,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:01:56,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:01:56,774 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-07-20 04:01:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:56,880 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-07-20 04:01:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 04:01:56,881 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-20 04:01:56,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:56,882 INFO L225 Difference]: With dead ends: 28 [2020-07-20 04:01:56,882 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 04:01:56,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 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 04:01:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 04:01:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 04:01:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 04:01:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-20 04:01:56,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 18 [2020-07-20 04:01:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:56,890 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-20 04:01:56,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:01:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-20 04:01:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 04:01:56,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:01:56,892 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:01:56,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 04:01:56,894 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:01:56,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:01:56,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1254457853, now seen corresponding path program 1 times [2020-07-20 04:01:56,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:01:56,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182796307] [2020-07-20 04:01:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6c4cdd75 [2020-07-20 04:01:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:01:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:56,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182796307] [2020-07-20 04:01:56,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87671224] [2020-07-20 04:01:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5053378a 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 04:01:57,015 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5053378a issued 4 check-sat command(s) [2020-07-20 04:01:57,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 04:01:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 04:01:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 04:01:57,063 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:01:57,065 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 04:01:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:01:57,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 04:01:57,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 04:01:57,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935783251] [2020-07-20 04:01:57,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 04:01:57,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:01:57,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 04:01:57,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-20 04:01:57,091 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-07-20 04:01:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:01:57,144 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-07-20 04:01:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:01:57,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-07-20 04:01:57,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:01:57,145 INFO L225 Difference]: With dead ends: 19 [2020-07-20 04:01:57,145 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 04:01:57,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-20 04:01:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 04:01:57,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 04:01:57,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 04:01:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 04:01:57,147 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-07-20 04:01:57,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:01:57,147 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 04:01:57,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 04:01:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 04:01:57,148 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 04:01:57,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 04:01:57,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 04:01:57,558 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 04:01:57,559 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 04:01:57,559 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 04:01:57,559 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 04:01:57,559 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 04:01:57,559 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 04:01:57,559 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 04:01:57,560 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 04:01:57,560 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 04:01:57,560 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 04:01:57,560 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-07-20 04:01:57,560 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-07-20 04:01:57,560 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-20 04:01:57,561 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) (<= main_~n~0 0) .cse0 .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-20 04:01:57,561 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-20 04:01:57,561 INFO L268 CegarLoopResult]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2020-07-20 04:01:57,561 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) .cse0 (<= main_~m~0 0) .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-20 04:01:57,562 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (let ((.cse0 (<= 0 main_~x~0)) (.cse1 (<= 0 main_~m~0))) (or (and (<= main_~x~0 0) (<= main_~n~0 0) .cse0 .cse1) (and (<= (+ main_~m~0 1) main_~n~0) .cse0 .cse1))) [2020-07-20 04:01:57,562 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-07-20 04:01:57,562 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 04:01:57,562 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 04:01:57,562 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 04:01:57,562 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 04:01:57,563 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 04:01:57,563 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 04:01:57,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 04:01:57 BoogieIcfgContainer [2020-07-20 04:01:57,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 04:01:57,586 INFO L168 Benchmark]: Toolchain (without parser) took 2939.78 ms. Allocated memory was 146.3 MB in the beginning and 234.4 MB in the end (delta: 88.1 MB). Free memory was 103.0 MB in the beginning and 153.5 MB in the end (delta: -50.5 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:57,587 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 04:01:57,588 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.14 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 92.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:57,589 INFO L168 Benchmark]: Boogie Preprocessor took 31.29 ms. Allocated memory is still 146.3 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:57,590 INFO L168 Benchmark]: RCFGBuilder took 351.01 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 170.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:57,591 INFO L168 Benchmark]: TraceAbstraction took 2285.39 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 170.7 MB in the beginning and 153.5 MB in the end (delta: 17.2 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-07-20 04:01:57,596 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 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.14 ms. Allocated memory is still 146.3 MB. Free memory was 102.6 MB in the beginning and 92.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.29 ms. Allocated memory is still 146.3 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.01 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 170.7 MB in the end (delta: -79.5 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2285.39 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 170.7 MB in the beginning and 153.5 MB in the end (delta: 17.2 MB). Peak memory consumption was 48.1 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: 17]: Loop Invariant Derived loop invariant: (((x <= 0 && 0 <= x) && m <= 0) && 0 <= m) || ((m + 1 <= n && 0 <= x) && 0 <= m) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 79 SDtfs, 48 SDslu, 260 SDs, 0 SdLazy, 128 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, 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, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 83 HoareAnnotationTreeSize, 15 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 81 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 105 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 3648 SizeOfPredicates, 6 NumberOfNonLiveVariables, 79 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/13 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...