/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-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:12,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:12,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:12,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:46:12,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:46:12,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:46:12,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:46:12,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:46:12,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:46:12,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:46:12,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:46:12,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:46:12,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:46:12,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:46:12,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:46:12,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:46:12,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:46:12,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:46:12,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:46:12,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:46:12,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:46:12,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:46:12,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:46:12,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:46:12,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:46:12,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:12,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:12,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:12,639 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 [2020-11-06 22:46:12,699 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:12,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:12,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:12,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:12,705 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:12,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:12,705 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:12,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:12,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:12,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:12,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:12,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:12,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:12,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:12,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:12,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:12,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:12,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:12,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:12,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:12,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:12,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:12,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:12,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:12,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:12,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:12,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:12,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:12,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:12,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:13,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:13,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:13,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:13,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:13,125 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:13,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-11-06 22:46:13,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8844e1742/8ea601e979604c088dcdcdfec17100a8/FLAG5a0e36ceb [2020-11-06 22:46:13,929 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:13,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-11-06 22:46:13,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8844e1742/8ea601e979604c088dcdcdfec17100a8/FLAG5a0e36ceb [2020-11-06 22:46:14,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8844e1742/8ea601e979604c088dcdcdfec17100a8 [2020-11-06 22:46:14,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:14,341 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:14,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:14,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:14,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:14,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71446369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14, skipping insertion in model container [2020-11-06 22:46:14,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:14,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:14,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:14,634 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:14,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:14,671 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:14,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14 WrapperNode [2020-11-06 22:46:14,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:14,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:14,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:14,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:14,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (1/1) ... [2020-11-06 22:46:14,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:14,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:14,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:14,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:14,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (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 [2020-11-06 22:46:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:14,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:46:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:46:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:46:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:15,178 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:15,178 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-06 22:46:15,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:15 BoogieIcfgContainer [2020-11-06 22:46:15,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:15,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:15,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:15,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:15,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:14" (1/3) ... [2020-11-06 22:46:15,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612f7e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:15, skipping insertion in model container [2020-11-06 22:46:15,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:14" (2/3) ... [2020-11-06 22:46:15,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612f7e3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:15, skipping insertion in model container [2020-11-06 22:46:15,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:15" (3/3) ... [2020-11-06 22:46:15,215 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-11-06 22:46:15,267 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:15,276 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:15,289 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:15,314 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:15,315 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:15,315 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:15,315 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:15,315 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:15,315 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:15,315 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:15,315 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-11-06 22:46:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:46:15,340 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:15,341 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] [2020-11-06 22:46:15,341 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:15,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1195393588, now seen corresponding path program 1 times [2020-11-06 22:46:15,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:15,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782180159] [2020-11-06 22:46:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:15,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:15,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782180159] [2020-11-06 22:46:15,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:15,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:46:15,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087558238] [2020-11-06 22:46:15,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:46:15,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:46:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:46:15,818 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 8 states. [2020-11-06 22:46:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:16,409 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2020-11-06 22:46:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:46:16,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-11-06 22:46:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:16,421 INFO L225 Difference]: With dead ends: 74 [2020-11-06 22:46:16,421 INFO L226 Difference]: Without dead ends: 43 [2020-11-06 22:46:16,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:46:16,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-06 22:46:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-11-06 22:46:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:46:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-11-06 22:46:16,479 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 20 [2020-11-06 22:46:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:16,480 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-11-06 22:46:16,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:46:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-11-06 22:46:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-06 22:46:16,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:16,483 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:16,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:16,484 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:16,485 INFO L82 PathProgramCache]: Analyzing trace with hash 146928195, now seen corresponding path program 1 times [2020-11-06 22:46:16,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:16,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382410036] [2020-11-06 22:46:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:16,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382410036] [2020-11-06 22:46:16,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37306078] [2020-11-06 22:46:16,653 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 [2020-11-06 22:46:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:16,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:46:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:16,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:46:16,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:46:16,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:46:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:16,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:46:16,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2020-11-06 22:46:16,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125997102] [2020-11-06 22:46:16,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:46:16,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:16,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:46:16,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:46:16,984 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-11-06 22:46:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:17,085 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-11-06 22:46:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:46:17,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-11-06 22:46:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:17,089 INFO L225 Difference]: With dead ends: 53 [2020-11-06 22:46:17,090 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:46:17,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:46:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:46:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-11-06 22:46:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:46:17,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-11-06 22:46:17,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-11-06 22:46:17,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:17,102 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-11-06 22:46:17,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:46:17,102 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-11-06 22:46:17,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:46:17,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:17,104 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:46:17,309 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1261555840, now seen corresponding path program 1 times [2020-11-06 22:46:17,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:17,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541324954] [2020-11-06 22:46:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:17,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:17,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-06 22:46:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:17,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541324954] [2020-11-06 22:46:17,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059893553] [2020-11-06 22:46:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 [2020-11-06 22:46:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-06 22:46:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-06 22:46:17,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:46:17,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2020-11-06 22:46:17,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61478208] [2020-11-06 22:46:17,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:46:17,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:46:17,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:46:17,607 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 4 states. [2020-11-06 22:46:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:17,665 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-11-06 22:46:17,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:46:17,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-06 22:46:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:17,667 INFO L225 Difference]: With dead ends: 56 [2020-11-06 22:46:17,667 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:46:17,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:46:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:46:17,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-11-06 22:46:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:46:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-06 22:46:17,688 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-11-06 22:46:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:17,688 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-06 22:46:17,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:46:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-06 22:46:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:46:17,689 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:17,690 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] [2020-11-06 22:46:17,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:17,905 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash -984262871, now seen corresponding path program 1 times [2020-11-06 22:46:17,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:17,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659804505] [2020-11-06 22:46:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:17,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:18,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-06 22:46:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:18,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659804505] [2020-11-06 22:46:18,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321426221] [2020-11-06 22:46:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:46:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:46:18,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:18,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-11-06 22:46:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133592331] [2020-11-06 22:46:18,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:46:18,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:18,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:46:18,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:46:18,203 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 12 states. [2020-11-06 22:46:18,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:18,854 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-11-06 22:46:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:46:18,855 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-11-06 22:46:18,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:18,856 INFO L225 Difference]: With dead ends: 70 [2020-11-06 22:46:18,856 INFO L226 Difference]: Without dead ends: 49 [2020-11-06 22:46:18,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:46:18,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-06 22:46:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-11-06 22:46:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-06 22:46:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-11-06 22:46:18,869 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 30 [2020-11-06 22:46:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:18,870 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-11-06 22:46:18,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:46:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-11-06 22:46:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-06 22:46:18,871 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:18,871 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-11-06 22:46:19,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:19,086 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:19,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1141471311, now seen corresponding path program 1 times [2020-11-06 22:46:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:19,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474908612] [2020-11-06 22:46:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:46:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:46:19,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474908612] [2020-11-06 22:46:19,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501775845] [2020-11-06 22:46:19,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:46:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:46:19,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-06 22:46:19,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2020-11-06 22:46:19,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352958733] [2020-11-06 22:46:19,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:46:19,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:46:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:46:19,373 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 6 states. [2020-11-06 22:46:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:19,443 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-11-06 22:46:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:46:19,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-11-06 22:46:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:19,445 INFO L225 Difference]: With dead ends: 72 [2020-11-06 22:46:19,445 INFO L226 Difference]: Without dead ends: 45 [2020-11-06 22:46:19,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:46:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-06 22:46:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-11-06 22:46:19,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-06 22:46:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-11-06 22:46:19,457 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2020-11-06 22:46:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:19,457 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-11-06 22:46:19,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:46:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-11-06 22:46:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-06 22:46:19,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:19,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:19,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:19,673 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:19,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1583069481, now seen corresponding path program 2 times [2020-11-06 22:46:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:19,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137551479] [2020-11-06 22:46:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-06 22:46:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-06 22:46:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:46:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137551479] [2020-11-06 22:46:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056761924] [2020-11-06 22:46:19,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:46:19,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-11-06 22:46:19,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:46:19,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:46:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:46:19,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:46:19,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-06 22:46:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-06 22:46:19,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:46:19,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2020-11-06 22:46:19,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937023270] [2020-11-06 22:46:19,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:46:19,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:19,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:46:19,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:46:19,982 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 15 states. [2020-11-06 22:46:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:20,490 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-11-06 22:46:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:46:20,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-11-06 22:46:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:20,492 INFO L225 Difference]: With dead ends: 70 [2020-11-06 22:46:20,492 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:46:20,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:46:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:46:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:46:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:46:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:46:20,495 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2020-11-06 22:46:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:20,495 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:46:20,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:46:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:46:20,495 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:46:20,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:46:20,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:46:21,277 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-11-06 22:46:21,277 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-11-06 22:46:21,278 INFO L266 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-11-06 22:46:21,278 INFO L266 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-06 22:46:21,278 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-06 22:46:21,278 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:21,278 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~__BLAST_NONDET~0 |old(~__BLAST_NONDET~0)|) (= |#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)|)) [2020-11-06 22:46:21,278 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:21,278 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:46:21,279 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:46:21,279 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:46:21,279 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:46:21,279 INFO L266 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-11-06 22:46:21,279 INFO L266 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:21,279 INFO L266 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:21,279 INFO L266 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-11-06 22:46:21,279 INFO L266 CegarLoopResult]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2020-11-06 22:46:21,280 INFO L262 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 main_~i~0))) (let ((.cse0 (<= .cse2 main_~j~0)) (.cse1 (< main_~i~0 main_~n~0))) (or (and .cse0 (<= 1 main_~i~0) .cse1) (and .cse0 (<= main_~j~0 .cse2) (<= 0 main_~i~0) .cse1)))) [2020-11-06 22:46:21,280 INFO L266 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-11-06 22:46:21,280 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 25 40) no Hoare annotation was computed. [2020-11-06 22:46:21,280 INFO L262 CegarLoopResult]: At program point L36-2(lines 36 37) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (< main_~j~0 (* 3 main_~i~0)) (< main_~i~0 main_~n~0)) [2020-11-06 22:46:21,280 INFO L266 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-11-06 22:46:21,280 INFO L262 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 3 main_~i~0))) (and (< (+ main_~k~0 1) .cse0) (<= (* 2 main_~i~0) main_~j~0) (< main_~j~0 .cse0) (< main_~i~0 main_~n~0))) [2020-11-06 22:46:21,281 INFO L266 CegarLoopResult]: For program point L37-1(lines 36 37) no Hoare annotation was computed. [2020-11-06 22:46:21,281 INFO L266 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-11-06 22:46:21,281 INFO L266 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-11-06 22:46:21,281 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 25 40) no Hoare annotation was computed. [2020-11-06 22:46:21,281 INFO L269 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-11-06 22:46:21,281 INFO L266 CegarLoopResult]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2020-11-06 22:46:21,281 INFO L262 CegarLoopResult]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse0 (<= 0 main_~i~0))) (or (= main_~i~0 0) (and .cse0 (<= 2 main_~n~0)) (and (<= main_~j~0 (* 2 main_~i~0)) .cse0 (<= main_~i~0 1)))) [2020-11-06 22:46:21,282 INFO L266 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-11-06 22:46:21,282 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 25 40) the Hoare annotation is: true [2020-11-06 22:46:21,282 INFO L266 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:21,282 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-11-06 22:46:21,282 INFO L266 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-11-06 22:46:21,282 INFO L262 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-11-06 22:46:21,282 INFO L266 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-11-06 22:46:21,283 INFO L266 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-11-06 22:46:21,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:46:21 BoogieIcfgContainer [2020-11-06 22:46:21,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:46:21,304 INFO L168 Benchmark]: Toolchain (without parser) took 6968.47 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 129.6 MB in the beginning and 67.6 MB in the end (delta: 62.0 MB). Peak memory consumption was 94.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:21,305 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory was 127.0 MB in the beginning and 126.9 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:21,306 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.58 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 119.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:21,307 INFO L168 Benchmark]: Boogie Preprocessor took 36.97 ms. Allocated memory is still 154.1 MB. Free memory was 119.3 MB in the beginning and 117.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:21,307 INFO L168 Benchmark]: RCFGBuilder took 469.85 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 102.0 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:21,309 INFO L168 Benchmark]: TraceAbstraction took 6119.08 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 101.5 MB in the beginning and 67.6 MB in the end (delta: 33.9 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:21,312 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory was 127.0 MB in the beginning and 126.9 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.58 ms. Allocated memory is still 154.1 MB. Free memory was 129.1 MB in the beginning and 119.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.97 ms. Allocated memory is still 154.1 MB. Free memory was 119.3 MB in the beginning and 117.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 469.85 ms. Allocated memory is still 154.1 MB. Free memory was 117.8 MB in the beginning and 102.0 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6119.08 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 101.5 MB in the beginning and 67.6 MB in the end (delta: 33.9 MB). Peak memory consumption was 66.1 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: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (2 * i <= j && j < 3 * i) && i < n - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (i == 0 || (0 <= i && 2 <= n)) || ((j <= 2 * i && 0 <= i) && i <= 1) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((2 * i <= j && 1 <= i) && i < n) || (((2 * i <= j && j <= 2 * i) && 0 <= i) && i < n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 201 SDslu, 300 SDs, 0 SdLazy, 619 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, 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, 6 MinimizatonAttempts, 31 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 43 PreInvPairs, 60 NumberOfFragments, 126 HoareAnnotationTreeSize, 43 FomulaSimplifications, 1866 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1208 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 338 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 327 ConstructedInterpolants, 0 QuantifiedInterpolants, 30683 SizeOfPredicates, 13 NumberOfNonLiveVariables, 596 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 84/112 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...