/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/array-fpi/ifcompf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:45:58,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:45:58,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:45:58,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:45:58,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:45:58,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:45:58,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:45:58,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:45:58,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:45:58,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:45:58,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:45:58,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:45:58,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:45:58,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:45:58,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:45:58,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:45:58,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:45:58,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:45:58,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:45:58,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:45:58,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:45:58,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:45:58,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:45:58,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:45:58,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:45:58,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:45:58,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:45:58,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:45:58,718 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 11:45:58,749 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:45:58,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:45:58,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:45:58,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:45:58,751 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:45:58,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:45:58,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:45:58,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:45:58,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:45:58,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:45:58,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:45:58,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:45:58,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:45:58,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:45:58,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:45:58,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:45:58,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:45:58,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:45:58,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:45:58,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:45:58,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:45:58,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:45:58,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:45:58,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:45:58,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:45:58,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:45:58,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:45:58,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:45:58,756 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:45:58,756 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 11:45:59,028 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:45:59,042 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:45:59,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:45:59,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:45:59,047 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:45:59,048 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 11:45:59,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcf3f1c5/47dc0bd1f5f7431db76084e65eee8027/FLAG5776d484d [2020-07-20 11:45:59,604 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:45:59,605 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifcompf.c [2020-07-20 11:45:59,618 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcf3f1c5/47dc0bd1f5f7431db76084e65eee8027/FLAG5776d484d [2020-07-20 11:45:59,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fcf3f1c5/47dc0bd1f5f7431db76084e65eee8027 [2020-07-20 11:45:59,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:45:59,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:45:59,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:45:59,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:45:59,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:45:59,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:59" (1/1) ... [2020-07-20 11:45:59,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff48b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:45:59, skipping insertion in model container [2020-07-20 11:45:59,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:45:59" (1/1) ... [2020-07-20 11:45:59,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:45:59,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:46:00,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:46:00,176 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:46:00,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:46:00,218 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:46:00,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00 WrapperNode [2020-07-20 11:46:00,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:46:00,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:46:00,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:46:00,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:46:00,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (1/1) ... [2020-07-20 11:46:00,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (1/1) ... [2020-07-20 11:46:00,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (1/1) ... [2020-07-20 11:46:00,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (1/1) ... [2020-07-20 11:46:00,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (1/1) ... [2020-07-20 11:46:00,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (1/1) ... [2020-07-20 11:46:00,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (1/1) ... [2020-07-20 11:46:00,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:46:00,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:46:00,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:46:00,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:46:00,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (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 11:46:00,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:46:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:46:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:46:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:46:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:46:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:46:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:46:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:46:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:46:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:46:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 11:46:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:46:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:46:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:46:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:46:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:46:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:46:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:46:00,736 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:46:00,736 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-20 11:46:00,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:00 BoogieIcfgContainer [2020-07-20 11:46:00,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:46:00,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:46:00,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:46:00,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:46:00,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:45:59" (1/3) ... [2020-07-20 11:46:00,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52099296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:00, skipping insertion in model container [2020-07-20 11:46:00,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:46:00" (2/3) ... [2020-07-20 11:46:00,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52099296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:46:00, skipping insertion in model container [2020-07-20 11:46:00,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:46:00" (3/3) ... [2020-07-20 11:46:00,754 INFO L109 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2020-07-20 11:46:00,767 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:46:00,775 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:46:00,792 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:46:00,824 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:46:00,824 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:46:00,824 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:46:00,824 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:46:00,825 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:46:00,825 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:46:00,825 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:46:00,825 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:46:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-07-20 11:46:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:46:00,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:00,855 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 11:46:00,856 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:00,863 INFO L82 PathProgramCache]: Analyzing trace with hash -794599326, now seen corresponding path program 1 times [2020-07-20 11:46:00,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:00,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889496299] [2020-07-20 11:46:00,873 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 11:46:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:00,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:46:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:01,003 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 11:46:01,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:01,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889496299] [2020-07-20 11:46:01,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:01,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:46:01,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006449932] [2020-07-20 11:46:01,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:46:01,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:46:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:46:01,031 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-07-20 11:46:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:01,057 INFO L93 Difference]: Finished difference Result 70 states and 95 transitions. [2020-07-20 11:46:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:46:01,059 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-20 11:46:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:01,067 INFO L225 Difference]: With dead ends: 70 [2020-07-20 11:46:01,067 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 11:46:01,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 11:46:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 11:46:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 11:46:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:46:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-07-20 11:46:01,119 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2020-07-20 11:46:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:01,120 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-07-20 11:46:01,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:46:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-07-20 11:46:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 11:46:01,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:01,122 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 11:46:01,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:01,338 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash -544938994, now seen corresponding path program 1 times [2020-07-20 11:46:01,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:01,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252171162] [2020-07-20 11:46:01,341 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 11:46:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:46:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:01,460 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 11:46:01,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:01,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252171162] [2020-07-20 11:46:01,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:01,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 11:46:01,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126274469] [2020-07-20 11:46:01,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 11:46:01,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 11:46:01,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 11:46:01,465 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-07-20 11:46:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:01,590 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2020-07-20 11:46:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 11:46:01,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-20 11:46:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:01,594 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:46:01,594 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:46:01,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 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 11:46:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:46:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-20 11:46:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 11:46:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-07-20 11:46:01,610 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 24 [2020-07-20 11:46:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:01,610 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-07-20 11:46:01,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 11:46:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-07-20 11:46:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:46:01,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:01,612 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, 1, 1, 1, 1, 1] [2020-07-20 11:46:01,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:01,828 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:01,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1796917477, now seen corresponding path program 1 times [2020-07-20 11:46:01,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:01,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625638153] [2020-07-20 11:46:01,830 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 11:46:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:01,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:46:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:46:01,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:01,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625638153] [2020-07-20 11:46:01,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:01,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:46:01,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141703946] [2020-07-20 11:46:01,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:46:01,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:46:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:46:01,913 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-07-20 11:46:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:01,994 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2020-07-20 11:46:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:46:01,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-20 11:46:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:01,997 INFO L225 Difference]: With dead ends: 72 [2020-07-20 11:46:01,997 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:46:01,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 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 11:46:01,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:46:02,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2020-07-20 11:46:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:46:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-07-20 11:46:02,008 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 33 [2020-07-20 11:46:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:02,008 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-07-20 11:46:02,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:46:02,009 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-07-20 11:46:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:46:02,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:02,010 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, 1, 1, 1, 1, 1] [2020-07-20 11:46:02,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:02,225 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:02,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1817991449, now seen corresponding path program 1 times [2020-07-20 11:46:02,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:02,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802394028] [2020-07-20 11:46:02,226 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 11:46:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:46:02,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:02,330 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 11:46:02,330 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:02,335 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:02,335 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:02,336 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-20 11:46:02,376 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:02,377 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 11:46:02,379 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 11:46:02,398 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-20 11:46:02,399 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:02,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-20 11:46:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:46:02,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:46:02,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802394028] [2020-07-20 11:46:02,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:02,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 11:46:02,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287793363] [2020-07-20 11:46:02,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 11:46:02,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:02,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 11:46:02,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 11:46:02,447 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 7 states. [2020-07-20 11:46:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:02,576 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-07-20 11:46:02,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:46:02,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-07-20 11:46:02,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:02,578 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:46:02,578 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 11:46:02,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 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 11:46:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 11:46:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-20 11:46:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 11:46:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-07-20 11:46:02,588 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 33 [2020-07-20 11:46:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:02,588 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-07-20 11:46:02,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 11:46:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-07-20 11:46:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 11:46:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:02,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:46:02,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:02,804 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1651297135, now seen corresponding path program 1 times [2020-07-20 11:46:02,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:02,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342374593] [2020-07-20 11:46:02,806 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 11:46:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:46:02,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:46:02,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:46:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:46:02,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342374593] [2020-07-20 11:46:02,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:46:02,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 11:46:02,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565061820] [2020-07-20 11:46:02,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:46:02,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:46:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:46:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:46:02,991 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2020-07-20 11:46:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:46:03,271 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2020-07-20 11:46:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:46:03,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-07-20 11:46:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:46:03,273 INFO L225 Difference]: With dead ends: 113 [2020-07-20 11:46:03,273 INFO L226 Difference]: Without dead ends: 65 [2020-07-20 11:46:03,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:46:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-20 11:46:03,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2020-07-20 11:46:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 11:46:03,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-07-20 11:46:03,285 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2020-07-20 11:46:03,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:46:03,285 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-07-20 11:46:03,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:46:03,285 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-07-20 11:46:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 11:46:03,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:46:03,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:46:03,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:03,502 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:46:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:46:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2142090186, now seen corresponding path program 1 times [2020-07-20 11:46:03,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:46:03,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133458496] [2020-07-20 11:46:03,505 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 11:46:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:46:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 11:46:03,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:46:03,592 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2020-07-20 11:46:03,593 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,600 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:03,601 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,601 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:8 [2020-07-20 11:46:03,627 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-20 11:46:03,627 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,634 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:03,635 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-20 11:46:03,737 INFO L350 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2020-07-20 11:46:03,738 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 59 [2020-07-20 11:46:03,741 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,772 INFO L624 ElimStorePlain]: treesize reduction 24, result has 60.7 percent of original size [2020-07-20 11:46:03,777 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:12 [2020-07-20 11:46:03,803 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-07-20 11:46:03,804 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,816 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:03,817 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,817 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-07-20 11:46:03,867 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-07-20 11:46:03,868 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2020-07-20 11:46:03,869 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:03,877 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:46:03,879 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 11:46:03,879 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:32 [2020-07-20 11:46:04,073 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-07-20 11:46:04,074 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 39 [2020-07-20 11:46:04,076 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:46:04,090 INFO L624 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-07-20 11:46:04,091 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:46:04,091 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:46, output treesize:7 [2020-07-20 11:46:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:46:04,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:46:04,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:46:08,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~c~0.offset Int)) (= 1 (select (let ((.cse0 (store (select |c_#memory_int| c_main_~c~0.base) main_~c~0.offset 0)) (.cse1 (* c_main_~i~0 8))) (store .cse0 (+ .cse1 main_~c~0.offset 8) (+ (select (select (store |c_#memory_int| c_main_~c~0.base .cse0) c_main_~b~0.base) (+ c_main_~b~0.offset .cse1)) (select .cse0 (+ .cse1 main_~c~0.offset))))) (+ main_~c~0.offset 8)))) is different from false [2020-07-20 11:46:09,014 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~c~0.offset Int)) (= 1 (select (select (store |c_#memory_int| c_main_~c~0.base (store (select |c_#memory_int| c_main_~c~0.base) main_~c~0.offset 0)) c_main_~b~0.base) c_main_~b~0.offset))) is different from false [2020-07-20 11:46:13,270 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~c~0.offset Int)) (= 1 (select (select (let ((.cse0 (store |c_#memory_int| c_main_~b~0.base (let ((.cse1 (select |c_#memory_int| c_main_~b~0.base)) (.cse2 (* c_main_~i~0 8))) (store .cse1 (+ c_main_~b~0.offset .cse2 8) (+ (select (select |c_#memory_int| c_main_~a~0.base) (+ .cse2 c_main_~a~0.offset)) (select .cse1 (+ c_main_~b~0.offset .cse2)))))))) (store .cse0 c_main_~c~0.base (store (select .cse0 c_main_~c~0.base) main_~c~0.offset 0))) c_main_~b~0.base) c_main_~b~0.offset))) is different from false [2020-07-20 11:46:13,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133458496] [2020-07-20 11:46:13,280 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-07-20 11:46:13,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:46:13,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-20 11:46:13,281 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-20 11:46:13,281 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:46:13,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:46:13,515 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-20 11:46:13,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:46:13 BoogieIcfgContainer [2020-07-20 11:46:13,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:46:13,517 INFO L168 Benchmark]: Toolchain (without parser) took 13573.85 ms. Allocated memory was 139.5 MB in the beginning and 244.8 MB in the end (delta: 105.4 MB). Free memory was 104.2 MB in the beginning and 118.9 MB in the end (delta: -14.7 MB). Peak memory consumption was 90.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:13,518 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-20 11:46:13,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.13 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 93.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:13,520 INFO L168 Benchmark]: Boogie Preprocessor took 139.76 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:13,520 INFO L168 Benchmark]: RCFGBuilder took 384.05 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.0 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:13,521 INFO L168 Benchmark]: TraceAbstraction took 12770.24 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 162.0 MB in the beginning and 118.9 MB in the end (delta: 43.1 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:46:13,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.13 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 93.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.76 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 384.05 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 162.0 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12770.24 ms. Allocated memory was 203.9 MB in the beginning and 244.8 MB in the end (delta: 40.9 MB). Free memory was 162.0 MB in the beginning and 118.9 MB in the end (delta: 43.1 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L28] long long *c = malloc(sizeof(long long)*N); [L30] i=0 [L30] COND TRUE i