/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/loop-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:44:30,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:44:30,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:44:30,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:44:30,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:44:30,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:44:30,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:44:30,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:44:30,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:44:30,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:44:30,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:44:30,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:44:30,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:44:30,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:44:30,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:44:30,772 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:44:30,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:44:30,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:44:30,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:44:30,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:44:30,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:44:30,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:44:30,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:44:30,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:44:30,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:44:30,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:44:30,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:44:30,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:44:30,803 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 [2020-10-23 18:44:30,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:44:30,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:44:30,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:44:30,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:44:30,856 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:44:30,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:44:30,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:44:30,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:44:30,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:44:30,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:44:30,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:44:30,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:44:30,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:44:30,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:44:30,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:44:30,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:44:30,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:44:30,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:44:30,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:44:30,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:44:30,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:44:30,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:44:30,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:44:30,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:44:30,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:44:30,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:44:30,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:44:30,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:44:30,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:44:30,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:44:31,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:44:31,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:44:31,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:44:31,313 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:44:31,314 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:44:31,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2020-10-23 18:44:31,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ced6ab9/fcb685bbc53d4026949cc8de45751091/FLAG4efcfd8e9 [2020-10-23 18:44:31,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:44:31,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i [2020-10-23 18:44:31,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ced6ab9/fcb685bbc53d4026949cc8de45751091/FLAG4efcfd8e9 [2020-10-23 18:44:32,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ced6ab9/fcb685bbc53d4026949cc8de45751091 [2020-10-23 18:44:32,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:44:32,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:44:32,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:32,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:44:32,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:44:32,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,360 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301fcc6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32, skipping insertion in model container [2020-10-23 18:44:32,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:44:32,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:44:32,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:32,599 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:44:32,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:32,637 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:44:32,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32 WrapperNode [2020-10-23 18:44:32,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:32,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:44:32,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:44:32,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:44:32,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (1/1) ... [2020-10-23 18:44:32,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:44:32,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:44:32,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:44:32,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:44:32,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (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 [2020-10-23 18:44:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:44:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:44:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:44:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:44:32,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:44:32,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:44:32,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:44:32,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:44:32,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:44:33,049 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:44:33,050 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:44:33,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:33 BoogieIcfgContainer [2020-10-23 18:44:33,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:44:33,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:44:33,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:44:33,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:44:33,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:44:32" (1/3) ... [2020-10-23 18:44:33,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35332eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:33, skipping insertion in model container [2020-10-23 18:44:33,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:32" (2/3) ... [2020-10-23 18:44:33,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35332eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:33, skipping insertion in model container [2020-10-23 18:44:33,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:33" (3/3) ... [2020-10-23 18:44:33,074 INFO L111 eAbstractionObserver]: Analyzing ICFG hhk2008.i [2020-10-23 18:44:33,101 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:44:33,109 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:44:33,141 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:44:33,205 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:44:33,206 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:44:33,206 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:44:33,206 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:44:33,206 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:44:33,206 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:44:33,206 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:44:33,207 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:44:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-23 18:44:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:44:33,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:33,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:33,242 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:33,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1251008373, now seen corresponding path program 1 times [2020-10-23 18:44:33,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:33,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984064900] [2020-10-23 18:44:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:33,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:33,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984064900] [2020-10-23 18:44:33,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:33,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:44:33,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787294670] [2020-10-23 18:44:33,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:44:33,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:33,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:44:33,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:44:33,815 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2020-10-23 18:44:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:34,125 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-23 18:44:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:34,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-23 18:44:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:34,134 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:44:34,135 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:44:34,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:44:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:44:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:44:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:44:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-23 18:44:34,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-23 18:44:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:34,178 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-23 18:44:34,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:44:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-23 18:44:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:44:34,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:34,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:44:34,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:44:34,180 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:34,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1336866373, now seen corresponding path program 1 times [2020-10-23 18:44:34,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:34,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817019228] [2020-10-23 18:44:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:34,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:34,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817019228] [2020-10-23 18:44:34,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178011450] [2020-10-23 18:44:34,395 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 -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 [2020-10-23 18:44:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:34,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:44:34,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:34,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:44:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:34,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:34,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-23 18:44:34,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819839844] [2020-10-23 18:44:34,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:44:34,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:34,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:44:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:34,650 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 13 states. [2020-10-23 18:44:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:35,046 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-10-23 18:44:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:44:35,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-23 18:44:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:35,047 INFO L225 Difference]: With dead ends: 19 [2020-10-23 18:44:35,047 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:35,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:44:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:35,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:35,050 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-10-23 18:44:35,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:35,050 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:35,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:44:35,051 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:35,051 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:35,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:44:35,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:35,538 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:44:35,539 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:44:35,539 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:44:35,539 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:44:35,540 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:44:35,540 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:35,540 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-23 18:44:35,540 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:35,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:35,541 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:35,541 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:35,541 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:35,541 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-23 18:44:35,541 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:35,541 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:35,542 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:35,542 INFO L270 CegarLoopResult]: At program point L32-2(lines 32 35) the Hoare annotation is: (let ((.cse1 (+ main_~res~0 main_~cnt~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= main_~res~0 .cse0))) [2020-10-23 18:44:35,543 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 38) the Hoare annotation is: true [2020-10-23 18:44:35,543 INFO L274 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-10-23 18:44:35,543 INFO L270 CegarLoopResult]: At program point L32-3(lines 32 35) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 main_~res~0) (<= main_~res~0 .cse0))) [2020-10-23 18:44:35,543 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-23 18:44:35,544 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 38) no Hoare annotation was computed. [2020-10-23 18:44:35,544 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 38) no Hoare annotation was computed. [2020-10-23 18:44:35,544 INFO L274 CegarLoopResult]: For program point L36(line 36) no Hoare annotation was computed. [2020-10-23 18:44:35,553 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:35,553 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-23 18:44:35,554 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:35,554 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-23 18:44:35,554 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-23 18:44:35,554 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-23 18:44:35,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:35 BoogieIcfgContainer [2020-10-23 18:44:35,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:35,579 INFO L168 Benchmark]: Toolchain (without parser) took 3235.05 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 132.2 MB in the beginning and 169.8 MB in the end (delta: -37.6 MB). Peak memory consumption was 79.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:35,581 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 103.0 MB in the beginning and 102.9 MB in the end (delta: 68.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:35,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.30 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 122.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:35,585 INFO L168 Benchmark]: Boogie Preprocessor took 37.50 ms. Allocated memory is still 156.2 MB. Free memory was 122.1 MB in the beginning and 120.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:35,587 INFO L168 Benchmark]: RCFGBuilder took 374.49 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 140.1 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:35,589 INFO L168 Benchmark]: TraceAbstraction took 2518.92 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 139.6 MB in the beginning and 169.8 MB in the end (delta: -30.2 MB). Peak memory consumption was 86.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:35,601 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 125.8 MB. Free memory was 103.0 MB in the beginning and 102.9 MB in the end (delta: 68.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.30 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 122.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.50 ms. Allocated memory is still 156.2 MB. Free memory was 122.1 MB in the beginning and 120.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 374.49 ms. Allocated memory is still 156.2 MB. Free memory was 120.7 MB in the beginning and 140.1 MB in the end (delta: -19.4 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2518.92 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 139.6 MB in the beginning and 169.8 MB in the end (delta: -30.2 MB). Peak memory consumption was 86.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (a + b <= res + cnt && res + cnt <= a + b) && res <= a + b - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 44 SDslu, 60 SDs, 0 SdLazy, 113 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 16 PreInvPairs, 21 NumberOfFragments, 64 HoareAnnotationTreeSize, 16 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 305 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 3048 SizeOfPredicates, 3 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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...