/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:40:32,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:40:32,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:40:32,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:40:32,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:40:32,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:40:32,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:40:32,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:40:32,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:40:32,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:40:32,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:40:32,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:40:32,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:40:32,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:40:32,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:40:32,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:40:32,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:40:32,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:40:32,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:40:32,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:40:32,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:40:32,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:40:32,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:40:32,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:40:32,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:40:32,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:40:32,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:40:32,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:40:32,419 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 [2020-07-21 11:40:32,440 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:40:32,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:40:32,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:40:32,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:40:32,442 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:40:32,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:40:32,443 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:40:32,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:40:32,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:40:32,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:40:32,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:40:32,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:40:32,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:40:32,444 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:40:32,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:40:32,445 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:40:32,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:40:32,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:40:32,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:40:32,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:40:32,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:40:32,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:40:32,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:40:32,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:40:32,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:40:32,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:40:32,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:32,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:40:32,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:40:32,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:40:32,770 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:40:32,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:40:32,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:40:32,790 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:40:32,790 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:40:32,791 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-21 11:40:32,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/465c4aec8/ca08de82676345928d2b749efed3562e/FLAG232695ff3 [2020-07-21 11:40:33,395 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:40:33,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-07-21 11:40:33,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/465c4aec8/ca08de82676345928d2b749efed3562e/FLAG232695ff3 [2020-07-21 11:40:33,741 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/465c4aec8/ca08de82676345928d2b749efed3562e [2020-07-21 11:40:33,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:40:33,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:40:33,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:33,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:40:33,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:40:33,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:33" (1/1) ... [2020-07-21 11:40:33,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f1e27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:33, skipping insertion in model container [2020-07-21 11:40:33,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:33" (1/1) ... [2020-07-21 11:40:33,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:40:33,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:40:33,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:33,974 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:40:33,996 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:40:34,016 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:40:34,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34 WrapperNode [2020-07-21 11:40:34,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:34,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:40:34,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:40:34,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:40:34,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (1/1) ... [2020-07-21 11:40:34,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (1/1) ... [2020-07-21 11:40:34,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (1/1) ... [2020-07-21 11:40:34,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (1/1) ... [2020-07-21 11:40:34,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (1/1) ... [2020-07-21 11:40:34,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (1/1) ... [2020-07-21 11:40:34,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (1/1) ... [2020-07-21 11:40:34,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:40:34,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:40:34,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:40:34,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:40:34,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (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 [2020-07-21 11:40:34,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:40:34,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:40:34,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:40:34,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:40:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:40:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:40:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:40:34,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:40:34,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:40:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:40:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:40:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:40:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:40:34,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:40:34,450 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:40:34,450 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 11:40:34,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:34 BoogieIcfgContainer [2020-07-21 11:40:34,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:40:34,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:40:34,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:40:34,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:40:34,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:40:33" (1/3) ... [2020-07-21 11:40:34,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58738192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:34, skipping insertion in model container [2020-07-21 11:40:34,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:34" (2/3) ... [2020-07-21 11:40:34,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58738192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:34, skipping insertion in model container [2020-07-21 11:40:34,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:34" (3/3) ... [2020-07-21 11:40:34,462 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-07-21 11:40:34,473 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:40:34,481 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:40:34,495 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:40:34,521 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:40:34,521 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:40:34,522 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:40:34,522 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:40:34,522 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:40:34,522 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:40:34,522 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:40:34,522 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:40:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 11:40:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:40:34,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:34,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:34,551 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:34,558 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-07-21 11:40:34,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:34,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584970158] [2020-07-21 11:40:34,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:34,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:40:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:34,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:34,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584970158] [2020-07-21 11:40:34,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:34,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:40:34,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238822258] [2020-07-21 11:40:34,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:40:34,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:34,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:40:34,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:40:34,725 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-21 11:40:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:34,754 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-07-21 11:40:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:40:34,756 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-07-21 11:40:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:34,765 INFO L225 Difference]: With dead ends: 42 [2020-07-21 11:40:34,766 INFO L226 Difference]: Without dead ends: 18 [2020-07-21 11:40:34,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:40:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-21 11:40:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-21 11:40:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 11:40:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-21 11:40:34,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-07-21 11:40:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:34,816 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-21 11:40:34,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:40:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-21 11:40:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:40:34,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:34,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:35,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:35,033 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:35,034 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-07-21 11:40:35,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:35,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697842405] [2020-07-21 11:40:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:40:35,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:35,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:40:35,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697842405] [2020-07-21 11:40:35,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:40:35,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:40:35,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333817836] [2020-07-21 11:40:35,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:40:35,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:40:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:40:35,127 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2020-07-21 11:40:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:35,176 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 11:40:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:40:35,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 11:40:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:35,180 INFO L225 Difference]: With dead ends: 35 [2020-07-21 11:40:35,180 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 11:40:35,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:40:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 11:40:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-07-21 11:40:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 11:40:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-07-21 11:40:35,191 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-07-21 11:40:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:35,192 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-07-21 11:40:35,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:40:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-07-21 11:40:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:40:35,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:35,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:35,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:35,409 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:35,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:35,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-07-21 11:40:35,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:35,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215881436] [2020-07-21 11:40:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:40:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:35,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:35,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215881436] [2020-07-21 11:40:35,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:35,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 11:40:35,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363764525] [2020-07-21 11:40:35,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:40:35,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:40:35,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:40:35,528 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2020-07-21 11:40:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:35,618 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-07-21 11:40:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:40:35,619 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-21 11:40:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:35,620 INFO L225 Difference]: With dead ends: 52 [2020-07-21 11:40:35,621 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 11:40:35,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:40:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 11:40:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-07-21 11:40:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 11:40:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 11:40:35,631 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2020-07-21 11:40:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:35,631 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 11:40:35,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:40:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 11:40:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:40:35,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:35,633 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:35,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:35,849 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:35,850 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 2 times [2020-07-21 11:40:35,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:35,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551533474] [2020-07-21 11:40:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:35,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 11:40:35,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:35,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:36,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551533474] [2020-07-21 11:40:36,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:36,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 11:40:36,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873381689] [2020-07-21 11:40:36,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 11:40:36,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:36,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 11:40:36,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:40:36,078 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 12 states. [2020-07-21 11:40:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:36,252 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2020-07-21 11:40:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 11:40:36,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-07-21 11:40:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:36,254 INFO L225 Difference]: With dead ends: 102 [2020-07-21 11:40:36,255 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 11:40:36,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:40:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 11:40:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2020-07-21 11:40:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 11:40:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-07-21 11:40:36,272 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 22 [2020-07-21 11:40:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:36,272 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-07-21 11:40:36,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 11:40:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2020-07-21 11:40:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 11:40:36,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:36,274 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:36,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:36,488 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1999606655, now seen corresponding path program 3 times [2020-07-21 11:40:36,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:36,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227480052] [2020-07-21 11:40:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:36,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 11:40:36,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:36,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:36,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227480052] [2020-07-21 11:40:36,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:36,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 11:40:36,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542924669] [2020-07-21 11:40:36,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 11:40:36,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 11:40:36,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:40:36,940 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand 24 states. [2020-07-21 11:40:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:37,329 INFO L93 Difference]: Finished difference Result 210 states and 267 transitions. [2020-07-21 11:40:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 11:40:37,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2020-07-21 11:40:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:37,332 INFO L225 Difference]: With dead ends: 210 [2020-07-21 11:40:37,332 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 11:40:37,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:40:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 11:40:37,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2020-07-21 11:40:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 11:40:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2020-07-21 11:40:37,353 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 34 [2020-07-21 11:40:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:37,353 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2020-07-21 11:40:37,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 11:40:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2020-07-21 11:40:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 11:40:37,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:37,357 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:37,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:37,571 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:37,572 INFO L82 PathProgramCache]: Analyzing trace with hash -54841831, now seen corresponding path program 4 times [2020-07-21 11:40:37,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:37,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017402956] [2020-07-21 11:40:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:37,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 11:40:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:38,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:38,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017402956] [2020-07-21 11:40:38,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:38,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 11:40:38,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590503478] [2020-07-21 11:40:38,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 11:40:38,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:38,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 11:40:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 11:40:38,971 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand 48 states. [2020-07-21 11:40:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:39,728 INFO L93 Difference]: Finished difference Result 426 states and 543 transitions. [2020-07-21 11:40:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-21 11:40:39,730 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 58 [2020-07-21 11:40:39,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:39,732 INFO L225 Difference]: With dead ends: 426 [2020-07-21 11:40:39,732 INFO L226 Difference]: Without dead ends: 333 [2020-07-21 11:40:39,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 11:40:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-07-21 11:40:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 288. [2020-07-21 11:40:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-07-21 11:40:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2020-07-21 11:40:39,761 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 58 [2020-07-21 11:40:39,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:39,762 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2020-07-21 11:40:39,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 11:40:39,762 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2020-07-21 11:40:39,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 11:40:39,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:39,766 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:39,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:39,981 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1746458953, now seen corresponding path program 5 times [2020-07-21 11:40:39,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:39,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912862102] [2020-07-21 11:40:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:40,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 11:40:40,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:41,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:40:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:45,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912862102] [2020-07-21 11:40:45,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:40:45,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-21 11:40:45,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645805660] [2020-07-21 11:40:45,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-21 11:40:45,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:40:45,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-21 11:40:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 11:40:45,025 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand 96 states. [2020-07-21 11:40:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:40:47,724 INFO L93 Difference]: Finished difference Result 858 states and 1095 transitions. [2020-07-21 11:40:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-21 11:40:47,725 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 106 [2020-07-21 11:40:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:40:47,732 INFO L225 Difference]: With dead ends: 858 [2020-07-21 11:40:47,732 INFO L226 Difference]: Without dead ends: 669 [2020-07-21 11:40:47,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-21 11:40:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2020-07-21 11:40:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 576. [2020-07-21 11:40:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-07-21 11:40:47,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 671 transitions. [2020-07-21 11:40:47,794 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 671 transitions. Word has length 106 [2020-07-21 11:40:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:40:47,797 INFO L479 AbstractCegarLoop]: Abstraction has 576 states and 671 transitions. [2020-07-21 11:40:47,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-21 11:40:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 671 transitions. [2020-07-21 11:40:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-07-21 11:40:47,808 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:40:47,808 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:40:48,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:48,023 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:40:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:40:48,024 INFO L82 PathProgramCache]: Analyzing trace with hash 982831017, now seen corresponding path program 6 times [2020-07-21 11:40:48,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:40:48,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248631202] [2020-07-21 11:40:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:40:48,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-21 11:40:48,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:40:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:40:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:41:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:07,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248631202] [2020-07-21 11:41:07,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:41:07,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 192 [2020-07-21 11:41:07,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843674166] [2020-07-21 11:41:07,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2020-07-21 11:41:07,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:07,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2020-07-21 11:41:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2020-07-21 11:41:07,824 INFO L87 Difference]: Start difference. First operand 576 states and 671 transitions. Second operand 192 states. [2020-07-21 11:41:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:29,340 INFO L93 Difference]: Finished difference Result 1722 states and 2199 transitions. [2020-07-21 11:41:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2020-07-21 11:41:29,343 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 202 [2020-07-21 11:41:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:29,359 INFO L225 Difference]: With dead ends: 1722 [2020-07-21 11:41:29,359 INFO L226 Difference]: Without dead ends: 1341 [2020-07-21 11:41:29,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2020-07-21 11:41:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2020-07-21 11:41:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1152. [2020-07-21 11:41:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2020-07-21 11:41:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1343 transitions. [2020-07-21 11:41:29,500 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1343 transitions. Word has length 202 [2020-07-21 11:41:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:29,500 INFO L479 AbstractCegarLoop]: Abstraction has 1152 states and 1343 transitions. [2020-07-21 11:41:29,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 192 states. [2020-07-21 11:41:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1343 transitions. [2020-07-21 11:41:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 11:41:29,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:29,510 INFO L422 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:29,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:29,724 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:29,725 INFO L82 PathProgramCache]: Analyzing trace with hash -74498967, now seen corresponding path program 7 times [2020-07-21 11:41:29,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:29,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46579528] [2020-07-21 11:41:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-21 11:41:30,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:50,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:42:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:42:59,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46579528] [2020-07-21 11:42:59,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:42:59,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 384 [2020-07-21 11:42:59,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869871924] [2020-07-21 11:42:59,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 384 states [2020-07-21 11:42:59,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:42:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2020-07-21 11:42:59,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2020-07-21 11:42:59,171 INFO L87 Difference]: Start difference. First operand 1152 states and 1343 transitions. Second operand 384 states. [2020-07-21 11:47:27,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:47:27,714 INFO L93 Difference]: Finished difference Result 3450 states and 4407 transitions. [2020-07-21 11:47:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2020-07-21 11:47:27,721 INFO L78 Accepts]: Start accepts. Automaton has 384 states. Word has length 394 [2020-07-21 11:47:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:47:27,734 INFO L225 Difference]: With dead ends: 3450 [2020-07-21 11:47:27,735 INFO L226 Difference]: Without dead ends: 2685 [2020-07-21 11:47:27,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.6s TimeCoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2020-07-21 11:47:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-07-21 11:47:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2304. [2020-07-21 11:47:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2020-07-21 11:47:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 2687 transitions. [2020-07-21 11:47:27,815 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 2687 transitions. Word has length 394 [2020-07-21 11:47:27,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:47:27,816 INFO L479 AbstractCegarLoop]: Abstraction has 2304 states and 2687 transitions. [2020-07-21 11:47:27,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 384 states. [2020-07-21 11:47:27,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 2687 transitions. [2020-07-21 11:47:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2020-07-21 11:47:27,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:47:27,838 INFO L422 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:47:28,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:47:28,054 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:47:28,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:47:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1435375081, now seen corresponding path program 8 times [2020-07-21 11:47:28,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:47:28,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852093476] [2020-07-21 11:47:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:47:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:47:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 2346 conjuncts, 384 conjunts are in the unsatisfiable core [2020-07-21 11:47:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:49:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:49:16,032 INFO L328 TraceCheckSpWp]: Computing backward predicates...