/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:23:35,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:23:35,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:23:35,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:23:35,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:23:35,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:23:35,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:23:35,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:23:35,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:23:35,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:23:35,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:23:35,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:23:35,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:23:35,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:23:35,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:23:35,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:23:35,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:23:35,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:23:35,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:23:35,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:23:35,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:23:35,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:23:35,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:23:35,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:23:35,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:23:35,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:23:35,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:23:35,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:23:35,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:23:35,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:23:35,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:23:35,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:23:35,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:23:35,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:23:35,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:23:35,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:23:35,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:23:35,818 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:23:35,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:23:35,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:23:35,820 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:23:35,821 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:23:35,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:23:35,821 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:23:35,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:23:35,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:23:35,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:23:35,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:23:35,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:23:35,822 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:23:35,823 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:23:35,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:23:35,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:23:35,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:23:35,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:23:35,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:23:35,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:23:35,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:23:35,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:23:35,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:23:35,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:23:35,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:23:35,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:23:35,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:23:35,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:23:35,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:23:35,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:23:36,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:23:36,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:23:36,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:23:36,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:23:36,288 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:23:36,289 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-09-04 13:23:36,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e636df7f/7d666412281a4b24a999a7662cf18827/FLAG4c357630a [2020-09-04 13:23:36,988 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:23:36,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-09-04 13:23:36,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e636df7f/7d666412281a4b24a999a7662cf18827/FLAG4c357630a [2020-09-04 13:23:37,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e636df7f/7d666412281a4b24a999a7662cf18827 [2020-09-04 13:23:37,318 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:23:37,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:23:37,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:23:37,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:23:37,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:23:37,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6870637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37, skipping insertion in model container [2020-09-04 13:23:37,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:23:37,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:23:37,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:23:37,607 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:23:37,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:23:37,655 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:23:37,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37 WrapperNode [2020-09-04 13:23:37,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:23:37,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:23:37,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:23:37,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:23:37,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... [2020-09-04 13:23:37,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:23:37,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:23:37,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:23:37,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:23:37,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:23:37,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:23:37,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:23:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:23:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:23:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-04 13:23:37,873 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:23:37,874 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-09-04 13:23:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 13:23:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 13:23:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:23:37,874 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:23:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:23:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:23:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:23:37,875 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 13:23:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:23:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:23:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:23:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-09-04 13:23:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:23:37,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:23:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:23:37,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:23:38,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:23:38,227 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:23:38,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:23:38 BoogieIcfgContainer [2020-09-04 13:23:38,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:23:38,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:23:38,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:23:38,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:23:38,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:23:37" (1/3) ... [2020-09-04 13:23:38,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2b7a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:23:38, skipping insertion in model container [2020-09-04 13:23:38,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:23:37" (2/3) ... [2020-09-04 13:23:38,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2b7a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:23:38, skipping insertion in model container [2020-09-04 13:23:38,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:23:38" (3/3) ... [2020-09-04 13:23:38,243 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-09-04 13:23:38,256 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:23:38,266 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:23:38,290 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:23:38,320 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:23:38,321 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:23:38,321 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:23:38,321 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:23:38,321 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:23:38,321 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:23:38,321 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:23:38,321 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:23:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-09-04 13:23:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:23:38,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:23:38,355 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] [2020-09-04 13:23:38,355 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:23:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:23:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1882906983, now seen corresponding path program 1 times [2020-09-04 13:23:38,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:23:38,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217066516] [2020-09-04 13:23:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:23:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:38,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:23:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:38,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:23:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:38,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 13:23:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:23:38,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217066516] [2020-09-04 13:23:38,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:23:38,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:23:38,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213162584] [2020-09-04 13:23:38,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:23:38,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:23:38,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:23:38,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:23:38,671 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2020-09-04 13:23:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:23:38,894 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-09-04 13:23:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:23:38,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-09-04 13:23:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:23:38,919 INFO L225 Difference]: With dead ends: 77 [2020-09-04 13:23:38,920 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 13:23:38,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:23:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 13:23:38,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-04 13:23:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 13:23:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-09-04 13:23:38,984 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2020-09-04 13:23:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:23:38,984 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-09-04 13:23:38,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:23:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-09-04 13:23:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:23:38,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:23:38,988 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] [2020-09-04 13:23:38,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:23:38,988 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:23:38,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:23:38,989 INFO L82 PathProgramCache]: Analyzing trace with hash 861838629, now seen corresponding path program 1 times [2020-09-04 13:23:38,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:23:38,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755713127] [2020-09-04 13:23:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:23:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:39,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:23:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:39,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:23:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:39,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 13:23:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:23:39,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755713127] [2020-09-04 13:23:39,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:23:39,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 13:23:39,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857364028] [2020-09-04 13:23:39,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:23:39,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:23:39,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:23:39,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 13:23:39,240 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 8 states. [2020-09-04 13:23:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:23:39,792 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-09-04 13:23:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:23:39,793 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-04 13:23:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:23:39,797 INFO L225 Difference]: With dead ends: 64 [2020-09-04 13:23:39,798 INFO L226 Difference]: Without dead ends: 62 [2020-09-04 13:23:39,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:23:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-04 13:23:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-09-04 13:23:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 13:23:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-09-04 13:23:39,819 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 24 [2020-09-04 13:23:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:23:39,820 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-09-04 13:23:39,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:23:39,820 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-09-04 13:23:39,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 13:23:39,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:23:39,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:23:39,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:23:39,822 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:23:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:23:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1086413545, now seen corresponding path program 1 times [2020-09-04 13:23:39,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:23:39,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669793438] [2020-09-04 13:23:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:23:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:39,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:23:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:40,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:23:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:40,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 13:23:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:40,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 13:23:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:23:40,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669793438] [2020-09-04 13:23:40,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978712236] [2020-09-04 13:23:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:23:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:40,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:23:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:23:40,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:23:40,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:23:40,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:23:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:23:40,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:23:40,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 14 [2020-09-04 13:23:40,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782881033] [2020-09-04 13:23:40,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 13:23:40,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:23:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 13:23:40,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:23:40,459 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 8 states. [2020-09-04 13:23:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:23:40,714 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-09-04 13:23:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:23:40,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-09-04 13:23:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:23:40,717 INFO L225 Difference]: With dead ends: 68 [2020-09-04 13:23:40,717 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 13:23:40,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:23:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 13:23:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-09-04 13:23:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 13:23:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-09-04 13:23:40,731 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2020-09-04 13:23:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:23:40,732 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-09-04 13:23:40,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 13:23:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-09-04 13:23:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-04 13:23:40,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:23:40,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2020-09-04 13:23:40,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:23:40,943 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:23:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:23:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1344635178, now seen corresponding path program 1 times [2020-09-04 13:23:40,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:23:40,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527225700] [2020-09-04 13:23:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:23:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:23:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 13:23:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 13:23:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 13:23:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-04 13:23:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 13:23:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 13:23:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-09-04 13:23:41,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527225700] [2020-09-04 13:23:41,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565833926] [2020-09-04 13:23:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:23:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:23:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:23:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:23:41,365 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 7 treesize of output 6 [2020-09-04 13:23:41,366 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:23:41,370 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:23:41,370 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:23:41,371 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-09-04 13:23:43,402 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1) ((as const (Array Int Int)) 0))) is different from true [2020-09-04 13:23:45,461 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3) ((as const (Array Int Int)) 0))) is different from true [2020-09-04 13:23:47,513 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4) ((as const (Array Int Int)) 0))) is different from true [2020-09-04 13:23:49,553 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5) ((as const (Array Int Int)) 0))) is different from true [2020-09-04 13:23:49,591 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 23 [2020-09-04 13:23:49,593 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:23:49,604 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:23:49,607 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-09-04 13:23:49,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-09-04 13:23:49,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:23:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2020-09-04 13:23:49,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:23:49,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2020-09-04 13:23:49,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040312955] [2020-09-04 13:23:49,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 13:23:49,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:23:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 13:23:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=184, Unknown=4, NotChecked=116, Total=342 [2020-09-04 13:23:49,718 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 19 states. [2020-09-04 13:23:56,062 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2020-09-04 13:24:00,155 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2020-09-04 13:24:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:24:08,545 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-04 13:24:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 13:24:08,547 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-09-04 13:24:08,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:24:08,548 INFO L225 Difference]: With dead ends: 47 [2020-09-04 13:24:08,548 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:24:08,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=107, Invalid=501, Unknown=8, NotChecked=196, Total=812 [2020-09-04 13:24:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:24:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:24:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:24:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:24:08,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2020-09-04 13:24:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:24:08,553 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:24:08,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 13:24:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:24:08,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:24:08,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:24:08,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:24:09,383 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:24:09,384 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-04 13:24:09,384 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:24:09,384 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:24:09,384 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:24:09,385 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:24:09,385 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:24:09,385 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2020-09-04 13:24:09,385 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-09-04 13:24:09,385 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2020-09-04 13:24:09,385 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2020-09-04 13:24:09,386 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 39 48) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-09-04 13:24:09,386 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 39 48) no Hoare annotation was computed. [2020-09-04 13:24:09,386 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= (select |#memory_int| |main_#t~malloc10.base|) .cse0))) [2020-09-04 13:24:09,386 INFO L264 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-09-04 13:24:09,386 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-09-04 13:24:09,386 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-09-04 13:24:09,387 INFO L268 CegarLoopResult]: For program point L43-1(line 43) no Hoare annotation was computed. [2020-09-04 13:24:09,387 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-09-04 13:24:09,387 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 39 48) no Hoare annotation was computed. [2020-09-04 13:24:09,387 INFO L268 CegarLoopResult]: For program point L34-1(line 34) no Hoare annotation was computed. [2020-09-04 13:24:09,387 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 14 37) the Hoare annotation is: true [2020-09-04 13:24:09,387 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)) (and (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (= |check_#in~x| 0) (<= 0 check_~x) .cse1)))))) [2020-09-04 13:24:09,388 INFO L268 CegarLoopResult]: For program point L31-1(line 31) no Hoare annotation was computed. [2020-09-04 13:24:09,388 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-04 13:24:09,388 INFO L268 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-09-04 13:24:09,388 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 24) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)) (and (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (= |check_#in~x| 0) .cse1 (= check_~x 0))))))) [2020-09-04 13:24:09,388 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 14 37) no Hoare annotation was computed. [2020-09-04 13:24:09,389 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)) (and (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and (= |check_#in~x| 0) .cse1 (= check_~x 0)) (and .cse1 (<= 1 |check_#in~x|) (<= 1 check_~x))))))) [2020-09-04 13:24:09,389 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-09-04 13:24:09,389 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-04 13:24:09,389 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 14 37) no Hoare annotation was computed. [2020-09-04 13:24:09,389 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (and (= check_~ax~0 0) (= check_~ai~0 0) (= (select |#memory_int| check_~a.base) .cse0) (let ((.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse1 (<= 1 check_~x)) (and (= |check_#in~x| 0) (<= 0 check_~x) .cse1)))) (not (<= 0 |check_#in~x|)) (not (= (select |#memory_int| |check_#in~a.base|) .cse0)))) [2020-09-04 13:24:09,389 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 8 10) the Hoare annotation is: true [2020-09-04 13:24:09,390 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 8 10) no Hoare annotation was computed. [2020-09-04 13:24:09,390 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-04 13:24:09,390 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-09-04 13:24:09,390 INFO L268 CegarLoopResult]: For program point L9-3(lines 8 10) no Hoare annotation was computed. [2020-09-04 13:24:09,390 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-09-04 13:24:09,390 INFO L264 CegarLoopResult]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-09-04 13:24:09,390 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:24:09,391 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:24:09,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:24:09 BoogieIcfgContainer [2020-09-04 13:24:09,399 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:24:09,401 INFO L168 Benchmark]: Toolchain (without parser) took 32081.50 ms. Allocated memory was 140.5 MB in the beginning and 245.4 MB in the end (delta: 104.9 MB). Free memory was 103.4 MB in the beginning and 115.1 MB in the end (delta: -11.8 MB). Peak memory consumption was 93.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:24:09,402 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:24:09,403 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.55 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:24:09,404 INFO L168 Benchmark]: Boogie Preprocessor took 129.60 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:24:09,404 INFO L168 Benchmark]: RCFGBuilder took 446.10 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 162.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:24:09,405 INFO L168 Benchmark]: TraceAbstraction took 31164.57 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 162.6 MB in the beginning and 115.1 MB in the end (delta: 47.5 MB). Peak memory consumption was 89.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:24:09,409 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.55 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.60 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.4 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 446.10 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 162.6 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31164.57 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 162.6 MB in the beginning and 115.1 MB in the end (delta: 47.5 MB). Peak memory consumption was 89.4 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 19.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 235 SDslu, 234 SDs, 0 SdLazy, 620 SolverSat, 183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 27.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=2, 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, 4 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 36 PreInvPairs, 44 NumberOfFragments, 245 HoareAnnotationTreeSize, 36 FomulaSimplifications, 580 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 15 FomulaSimplificationsInter, 504 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 222 NumberOfCodeBlocks, 222 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 216 ConstructedInterpolants, 17 QuantifiedInterpolants, 32653 SizeOfPredicates, 18 NumberOfNonLiveVariables, 355 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 35/54 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...