/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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:47:58,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:47:58,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:47:58,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:47:58,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:47:58,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:47:58,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:47:58,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:47:58,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:47:58,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:47:58,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:47:58,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:47:58,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:47:58,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:47:58,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:47:58,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:47:58,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:47:58,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:47:58,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:47:58,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:47:58,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:47:58,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:47:58,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:47:58,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:47:58,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:47:58,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:47:58,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:47:58,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:47:58,780 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 11:47:58,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:47:58,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:47:58,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:47:58,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:47:58,802 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:47:58,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:47:58,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:47:58,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:47:58,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:47:58,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:47:58,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:47:58,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:47:58,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:47:58,804 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:47:58,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:47:58,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:47:58,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:47:58,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:47:58,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:47:58,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:47:58,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:47:58,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:47:58,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:47:58,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:47:58,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:47:58,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:47:58,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:47:58,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:47:58,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:47:58,807 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 [2020-07-20 11:47:59,125 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:47:59,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:47:59,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:47:59,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:47:59,158 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:47:59,159 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-07-20 11:47:59,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8640575d8/12c7abe163fe4496bd4d699389b3ae77/FLAGff7cfbfdc [2020-07-20 11:47:59,792 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:47:59,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-07-20 11:47:59,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8640575d8/12c7abe163fe4496bd4d699389b3ae77/FLAGff7cfbfdc [2020-07-20 11:48:00,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8640575d8/12c7abe163fe4496bd4d699389b3ae77 [2020-07-20 11:48:00,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:00,118 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:00,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:00,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:00,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:00,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600803b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00, skipping insertion in model container [2020-07-20 11:48:00,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,141 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:00,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:00,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:00,419 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:00,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:00,478 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:00,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00 WrapperNode [2020-07-20 11:48:00,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:00,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:00,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:00,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:00,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (1/1) ... [2020-07-20 11:48:00,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:00,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:00,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:00,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:00,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (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 11:48:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:48:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:00,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:00,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:00,697 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:48:00,698 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:48:00,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:00,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 11:48:00,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:00,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:48:00,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:48:00,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:48:00,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:48:00,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:00,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:01,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:01,061 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-07-20 11:48:01,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:01 BoogieIcfgContainer [2020-07-20 11:48:01,068 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:01,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:01,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:01,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:01,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:00" (1/3) ... [2020-07-20 11:48:01,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3931ff67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:01, skipping insertion in model container [2020-07-20 11:48:01,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:00" (2/3) ... [2020-07-20 11:48:01,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3931ff67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:01, skipping insertion in model container [2020-07-20 11:48:01,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:01" (3/3) ... [2020-07-20 11:48:01,080 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-07-20 11:48:01,098 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:01,109 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:01,127 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:01,160 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:01,160 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:01,161 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:01,161 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:01,161 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:01,161 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:01,162 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:01,162 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-20 11:48:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 11:48:01,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:01,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:01,197 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash -522531256, now seen corresponding path program 1 times [2020-07-20 11:48:01,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:01,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737435440] [2020-07-20 11:48:01,219 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 [2020-07-20 11:48:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:01,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:01,352 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 11:48:01,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:01,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737435440] [2020-07-20 11:48:01,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:01,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:01,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631858193] [2020-07-20 11:48:01,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:01,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:01,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:01,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:01,396 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-20 11:48:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:01,430 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2020-07-20 11:48:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:01,432 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 11:48:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:01,443 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:48:01,443 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 11:48:01,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 11:48:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 11:48:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 11:48:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-07-20 11:48:01,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2020-07-20 11:48:01,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:01,503 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-07-20 11:48:01,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:01,503 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-07-20 11:48:01,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:48:01,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:01,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:01,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:01,720 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:01,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1282672092, now seen corresponding path program 1 times [2020-07-20 11:48:01,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:01,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722772688] [2020-07-20 11:48:01,723 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 [2020-07-20 11:48:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:48:01,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:01,840 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 11:48:01,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:01,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722772688] [2020-07-20 11:48:01,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:01,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:48:01,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550733479] [2020-07-20 11:48:01,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:48:01,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:48:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:48:01,846 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2020-07-20 11:48:01,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:01,904 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-07-20 11:48:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:48:01,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 11:48:01,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:01,909 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:48:01,909 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:48:01,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:48:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:48:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-07-20 11:48:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:48:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-07-20 11:48:01,921 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2020-07-20 11:48:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:01,922 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-07-20 11:48:01,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:48:01,922 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-07-20 11:48:01,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 11:48:01,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:01,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:02,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:02,138 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:02,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1816798436, now seen corresponding path program 1 times [2020-07-20 11:48:02,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:02,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624591873] [2020-07-20 11:48:02,141 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 [2020-07-20 11:48:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:02,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:48:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:48:02,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:48:02,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624591873] [2020-07-20 11:48:02,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:02,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:48:02,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155811787] [2020-07-20 11:48:02,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:48:02,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:02,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:48:02,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:02,289 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2020-07-20 11:48:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:02,441 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2020-07-20 11:48:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:48:02,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-07-20 11:48:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:02,443 INFO L225 Difference]: With dead ends: 79 [2020-07-20 11:48:02,443 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 11:48:02,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:02,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 11:48:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2020-07-20 11:48:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 11:48:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-20 11:48:02,455 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2020-07-20 11:48:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:02,455 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-20 11:48:02,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:48:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-20 11:48:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:48:02,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:02,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:02,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:02,674 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:02,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1106103076, now seen corresponding path program 2 times [2020-07-20 11:48:02,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:02,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29633387] [2020-07-20 11:48:02,675 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 [2020-07-20 11:48:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:48:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:48:02,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:48:02,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29633387] [2020-07-20 11:48:02,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:02,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-07-20 11:48:02,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240684502] [2020-07-20 11:48:02,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:48:02,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:02,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:48:02,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:48:02,867 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 7 states. [2020-07-20 11:48:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:02,995 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-20 11:48:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:48:02,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-07-20 11:48:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:02,997 INFO L225 Difference]: With dead ends: 93 [2020-07-20 11:48:02,997 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 11:48:02,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:48:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 11:48:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-07-20 11:48:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:48:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-07-20 11:48:03,007 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2020-07-20 11:48:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:03,008 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-07-20 11:48:03,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:48:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-20 11:48:03,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 11:48:03,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:03,010 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:03,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:03,226 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1061537308, now seen corresponding path program 3 times [2020-07-20 11:48:03,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:03,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385952836] [2020-07-20 11:48:03,229 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 [2020-07-20 11:48:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:03,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 11:48:03,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:03,337 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:03,348 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 11:48:03,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:03,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385952836] [2020-07-20 11:48:03,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:03,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 11:48:03,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465090500] [2020-07-20 11:48:03,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:48:03,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:48:03,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:48:03,396 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 7 states. [2020-07-20 11:48:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:03,500 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-07-20 11:48:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:48:03,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-07-20 11:48:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:03,504 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:48:03,504 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:48:03,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:48:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:48:03,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 11:48:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 11:48:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-20 11:48:03,518 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2020-07-20 11:48:03,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:03,520 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-20 11:48:03,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:48:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-20 11:48:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 11:48:03,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:03,530 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:03,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:03,731 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash -637010121, now seen corresponding path program 1 times [2020-07-20 11:48:03,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:03,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692265358] [2020-07-20 11:48:03,733 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 [2020-07-20 11:48:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:03,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:48:03,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:03,864 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:03,868 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 11:48:03,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:03,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692265358] [2020-07-20 11:48:03,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:03,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 11:48:03,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699077834] [2020-07-20 11:48:03,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 11:48:03,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:03,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 11:48:03,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:48:03,922 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-07-20 11:48:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:04,048 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-07-20 11:48:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:48:04,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-07-20 11:48:04,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:04,050 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:48:04,050 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 11:48:04,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:48:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 11:48:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-20 11:48:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 11:48:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-07-20 11:48:04,058 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2020-07-20 11:48:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:04,059 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-07-20 11:48:04,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 11:48:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-07-20 11:48:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 11:48:04,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:04,060 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:04,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:04,261 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:04,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1604149734, now seen corresponding path program 1 times [2020-07-20 11:48:04,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:04,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476354424] [2020-07-20 11:48:04,264 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 [2020-07-20 11:48:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:48:04,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 11:48:04,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:04,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476354424] [2020-07-20 11:48:04,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:04,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:48:04,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874487658] [2020-07-20 11:48:04,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:48:04,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:04,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:48:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:48:04,361 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 4 states. [2020-07-20 11:48:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:04,386 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-07-20 11:48:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:48:04,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-07-20 11:48:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:04,390 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:48:04,390 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 11:48:04,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:48:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 11:48:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 11:48:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 11:48:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-07-20 11:48:04,407 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-07-20 11:48:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:04,408 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-07-20 11:48:04,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:48:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-07-20 11:48:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 11:48:04,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:04,411 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:04,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:04,624 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:04,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash 855134175, now seen corresponding path program 1 times [2020-07-20 11:48:04,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:04,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26283804] [2020-07-20 11:48:04,627 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 [2020-07-20 11:48:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:04,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:48:04,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:04,745 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:04,747 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:48:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-20 11:48:04,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:04,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:48:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 11:48:04,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26283804] [2020-07-20 11:48:04,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 11:48:04,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2020-07-20 11:48:04,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833351657] [2020-07-20 11:48:04,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:48:04,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:48:04,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:48:04,822 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 5 states. [2020-07-20 11:48:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:04,840 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-07-20 11:48:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:48:04,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-07-20 11:48:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:04,841 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:48:04,841 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:48:04,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:48:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:48:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:48:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:48:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:48:04,843 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-07-20 11:48:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:04,843 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:48:04,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:48:04,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:48:04,844 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:48:05,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:05,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:48:05,313 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:48:05,313 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:48:05,313 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:48:05,313 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:48:05,313 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:48:05,313 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:48:05,314 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:48:05,314 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:48:05,314 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:48:05,314 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:48:05,314 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-20 11:48:05,314 INFO L264 CegarLoopResult]: At program point L35-3(lines 35 36) the Hoare annotation is: (and (<= 0 main_~nc_B~0) (= 0 main_~found~0)) [2020-07-20 11:48:05,314 INFO L268 CegarLoopResult]: For program point L35-4(lines 18 61) no Hoare annotation was computed. [2020-07-20 11:48:05,314 INFO L268 CegarLoopResult]: For program point L31-1(lines 31 32) no Hoare annotation was computed. [2020-07-20 11:48:05,315 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 32) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 11:48:05,315 INFO L268 CegarLoopResult]: For program point L31-4(lines 31 32) no Hoare annotation was computed. [2020-07-20 11:48:05,315 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 61) no Hoare annotation was computed. [2020-07-20 11:48:05,317 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-07-20 11:48:05,317 INFO L264 CegarLoopResult]: At program point L44-2(lines 42 54) the Hoare annotation is: (or (and (<= 1 main_~nc_B~0) (= 0 main_~found~0)) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0))) [2020-07-20 11:48:05,318 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 11:48:05,318 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-07-20 11:48:05,318 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (let ((.cse0 (= 1 main_~found~0))) (or (and (or .cse0 (= 0 main_~found~0)) (<= 1 main_~nc_B~0)) (and .cse0 (<= 0 main_~j~0)))) [2020-07-20 11:48:05,318 INFO L268 CegarLoopResult]: For program point L58-1(line 58) no Hoare annotation was computed. [2020-07-20 11:48:05,318 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 61) no Hoare annotation was computed. [2020-07-20 11:48:05,319 INFO L268 CegarLoopResult]: For program point L42-2(lines 42 54) no Hoare annotation was computed. [2020-07-20 11:48:05,319 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 61) the Hoare annotation is: true [2020-07-20 11:48:05,319 INFO L268 CegarLoopResult]: For program point L26-2(lines 26 27) no Hoare annotation was computed. [2020-07-20 11:48:05,319 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 27) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 11:48:05,319 INFO L268 CegarLoopResult]: For program point L26-4(lines 26 27) no Hoare annotation was computed. [2020-07-20 11:48:05,319 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 23) no Hoare annotation was computed. [2020-07-20 11:48:05,319 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 23) the Hoare annotation is: (= 0 main_~found~0) [2020-07-20 11:48:05,320 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 23) no Hoare annotation was computed. [2020-07-20 11:48:05,320 INFO L268 CegarLoopResult]: For program point L35-1(lines 35 36) no Hoare annotation was computed. [2020-07-20 11:48:05,320 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 12) the Hoare annotation is: true [2020-07-20 11:48:05,320 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:48:05,320 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 11:48:05,320 INFO L268 CegarLoopResult]: For program point L8(lines 8 10) no Hoare annotation was computed. [2020-07-20 11:48:05,320 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 12) no Hoare annotation was computed. [2020-07-20 11:48:05,321 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 11:48:05,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:48:05 BoogieIcfgContainer [2020-07-20 11:48:05,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:48:05,345 INFO L168 Benchmark]: Toolchain (without parser) took 5227.43 ms. Allocated memory was 135.8 MB in the beginning and 253.2 MB in the end (delta: 117.4 MB). Free memory was 100.3 MB in the beginning and 180.4 MB in the end (delta: -80.1 MB). Peak memory consumption was 37.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:05,346 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 135.8 MB. Free memory is still 118.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-20 11:48:05,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.78 ms. Allocated memory is still 135.8 MB. Free memory was 99.9 MB in the beginning and 89.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:05,348 INFO L168 Benchmark]: Boogie Preprocessor took 141.51 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 89.2 MB in the beginning and 177.6 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:05,349 INFO L168 Benchmark]: RCFGBuilder took 446.40 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 158.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:05,350 INFO L168 Benchmark]: TraceAbstraction took 4272.39 ms. Allocated memory was 200.3 MB in the beginning and 253.2 MB in the end (delta: 53.0 MB). Free memory was 157.0 MB in the beginning and 180.4 MB in the end (delta: -23.4 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:48:05,354 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 135.8 MB. Free memory is still 118.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 358.78 ms. Allocated memory is still 135.8 MB. Free memory was 99.9 MB in the beginning and 89.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.51 ms. Allocated memory was 135.8 MB in the beginning and 200.3 MB in the end (delta: 64.5 MB). Free memory was 89.2 MB in the beginning and 177.6 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.40 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 158.0 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4272.39 ms. Allocated memory was 200.3 MB in the beginning and 253.2 MB in the end (delta: 53.0 MB). Free memory was 157.0 MB in the beginning and 180.4 MB in the end (delta: -23.4 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (1 <= nc_B && 0 == found) || (0 <= j && nc_B <= 0) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 <= nc_B && 0 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 229 SDtfs, 127 SDslu, 443 SDs, 0 SdLazy, 224 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 419 GetRequests, 374 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=7, 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, 8 MinimizatonAttempts, 43 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 19 PreInvPairs, 43 NumberOfFragments, 55 HoareAnnotationTreeSize, 19 FomulaSimplifications, 280 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 14 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 302 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 409 ConstructedInterpolants, 0 QuantifiedInterpolants, 23905 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1034 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 297/333 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...