/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-b8ad66e [2020-10-23 18:44:16,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:44:16,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:44:16,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:44:16,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:44:16,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:44:16,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:44:16,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:44:16,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:44:16,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:44:16,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:44:16,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:44:16,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:44:16,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:44:16,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:44:16,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:44:16,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:44:16,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:44:16,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:44:16,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:44:16,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:44:16,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:44:16,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:44:16,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:44:16,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:44:16,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:44:16,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:44:16,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:44:16,628 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 18:44:16,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:44:16,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:44:16,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:44:16,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:44:16,686 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:44:16,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:44:16,687 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:44:16,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:44:16,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:44:16,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:44:16,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:44:16,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:44:16,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:44:16,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:44:16,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:44:16,689 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:44:16,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:44:16,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:44:16,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:44:16,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:44:16,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:44:16,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:44:16,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:44:16,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:44:16,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:44:16,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:44:16,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:44:16,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:44:16,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:44:16,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:44:17,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:44:17,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:44:17,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:44:17,121 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:44:17,122 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:44:17,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-23 18:44:17,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2eefecb5/9760c38ed1bd4296955ba03c184a5bdf/FLAGfecb620a3 [2020-10-23 18:44:17,849 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:44:17,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2020-10-23 18:44:17,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2eefecb5/9760c38ed1bd4296955ba03c184a5bdf/FLAGfecb620a3 [2020-10-23 18:44:18,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2eefecb5/9760c38ed1bd4296955ba03c184a5bdf [2020-10-23 18:44:18,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:44:18,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:44:18,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:18,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:44:18,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:44:18,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7e8060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18, skipping insertion in model container [2020-10-23 18:44:18,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:44:18,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:44:18,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:18,472 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:44:18,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:44:18,513 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:44:18,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18 WrapperNode [2020-10-23 18:44:18,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:44:18,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:44:18,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:44:18,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:44:18,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (1/1) ... [2020-10-23 18:44:18,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:44:18,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:44:18,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:44:18,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:44:18,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (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 18:44:18,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:44:18,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:44:18,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:44:18,645 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:44:18,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:44:18,645 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:44:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:44:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:44:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:44:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:44:18,646 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:44:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:44:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:44:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:44:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:44:18,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:44:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:44:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:44:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:44:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:44:18,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:44:18,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:44:18,985 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:44:18,985 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 18:44:18,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:18 BoogieIcfgContainer [2020-10-23 18:44:18,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:44:18,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:44:18,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:44:18,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:44:18,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:44:18" (1/3) ... [2020-10-23 18:44:18,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721a91e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:18, skipping insertion in model container [2020-10-23 18:44:18,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:44:18" (2/3) ... [2020-10-23 18:44:18,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721a91e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:44:18, skipping insertion in model container [2020-10-23 18:44:18,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:44:18" (3/3) ... [2020-10-23 18:44:18,998 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-10-23 18:44:19,012 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:44:19,035 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:44:19,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:44:19,080 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:44:19,080 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:44:19,080 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:44:19,081 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:44:19,081 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:44:19,081 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:44:19,081 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:44:19,081 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:44:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-23 18:44:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:44:19,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:19,108 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] [2020-10-23 18:44:19,109 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:19,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1195393588, now seen corresponding path program 1 times [2020-10-23 18:44:19,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:19,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594296675] [2020-10-23 18:44:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:19,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:19,554 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 18:44:19,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594296675] [2020-10-23 18:44:19,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:44:19,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 18:44:19,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684490669] [2020-10-23 18:44:19,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:44:19,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:19,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:44:19,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:44:19,587 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 8 states. [2020-10-23 18:44:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:20,322 INFO L93 Difference]: Finished difference Result 74 states and 108 transitions. [2020-10-23 18:44:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:44:20,324 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-23 18:44:20,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:20,334 INFO L225 Difference]: With dead ends: 74 [2020-10-23 18:44:20,334 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 18:44:20,338 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 [2020-10-23 18:44:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 18:44:20,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-23 18:44:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:44:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-23 18:44:20,392 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 20 [2020-10-23 18:44:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:20,392 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-23 18:44:20,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:44:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-23 18:44:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 18:44:20,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:20,395 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] [2020-10-23 18:44:20,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:44:20,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash 146928195, now seen corresponding path program 1 times [2020-10-23 18:44:20,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:20,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614585676] [2020-10-23 18:44:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614585676] [2020-10-23 18:44:20,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202617702] [2020-10-23 18:44:20,567 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 18:44:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:20,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-23 18:44:20,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:20,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:20,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:20,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:20,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:44:20,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2020-10-23 18:44:20,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088421526] [2020-10-23 18:44:20,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:44:20,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:20,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:44:20,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:44:20,868 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-10-23 18:44:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:20,963 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-23 18:44:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:44:20,964 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-23 18:44:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:20,967 INFO L225 Difference]: With dead ends: 53 [2020-10-23 18:44:20,967 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:44:20,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:44:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:44:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2020-10-23 18:44:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:44:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-23 18:44:20,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 23 [2020-10-23 18:44:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:20,980 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-23 18:44:20,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:44:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-23 18:44:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:44:20,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:20,981 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] [2020-10-23 18:44:21,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:44:21,194 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:21,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1261555840, now seen corresponding path program 1 times [2020-10-23 18:44:21,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:21,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433313897] [2020-10-23 18:44:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 18:44:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:21,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433313897] [2020-10-23 18:44:21,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282492110] [2020-10-23 18:44:21,372 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 [2020-10-23 18:44:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:44:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:44:21,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:44:21,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2020-10-23 18:44:21,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567413652] [2020-10-23 18:44:21,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:44:21,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:21,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:44:21,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:44:21,483 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 4 states. [2020-10-23 18:44:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:21,525 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-23 18:44:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:44:21,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-23 18:44:21,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:21,528 INFO L225 Difference]: With dead ends: 56 [2020-10-23 18:44:21,528 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:44:21,529 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 [2020-10-23 18:44:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:44:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-23 18:44:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:44:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-23 18:44:21,540 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2020-10-23 18:44:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:21,540 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-23 18:44:21,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:44:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-23 18:44:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:44:21,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:21,542 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] [2020-10-23 18:44:21,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:21,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:21,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:21,759 INFO L82 PathProgramCache]: Analyzing trace with hash -984262871, now seen corresponding path program 1 times [2020-10-23 18:44:21,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:21,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733391785] [2020-10-23 18:44:21,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 18:44:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:21,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733391785] [2020-10-23 18:44:21,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223139875] [2020-10-23 18:44:21,917 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 [2020-10-23 18:44:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:21,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:44:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:44:22,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:22,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-10-23 18:44:22,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962538064] [2020-10-23 18:44:22,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 18:44:22,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 18:44:22,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-23 18:44:22,103 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 12 states. [2020-10-23 18:44:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:22,892 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-10-23 18:44:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 18:44:22,893 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-23 18:44:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:22,895 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:44:22,895 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 18:44:22,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:44:22,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 18:44:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-10-23 18:44:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 18:44:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-23 18:44:22,911 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 30 [2020-10-23 18:44:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:22,911 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-23 18:44:22,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 18:44:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-23 18:44:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 18:44:22,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:22,913 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] [2020-10-23 18:44:23,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:23,127 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1141471311, now seen corresponding path program 1 times [2020-10-23 18:44:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:23,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582956836] [2020-10-23 18:44:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:44:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:44:23,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582956836] [2020-10-23 18:44:23,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509527739] [2020-10-23 18:44:23,265 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 [2020-10-23 18:44:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-23 18:44:23,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:44:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 18:44:23,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2020-10-23 18:44:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117621941] [2020-10-23 18:44:23,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:44:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:44:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:44:23,457 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 6 states. [2020-10-23 18:44:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:23,548 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2020-10-23 18:44:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:44:23,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-23 18:44:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:23,553 INFO L225 Difference]: With dead ends: 72 [2020-10-23 18:44:23,553 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 18:44:23,554 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 [2020-10-23 18:44:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 18:44:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-23 18:44:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 18:44:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-23 18:44:23,567 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2020-10-23 18:44:23,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:23,567 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-23 18:44:23,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:44:23,567 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-23 18:44:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-23 18:44:23,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:44:23,569 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] [2020-10-23 18:44:23,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:44:23,779 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:44:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:44:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1583069481, now seen corresponding path program 2 times [2020-10-23 18:44:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:44:23,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361357019] [2020-10-23 18:44:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:44:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:44:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-23 18:44:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 18:44:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:44:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:44:23,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361357019] [2020-10-23 18:44:23,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889934935] [2020-10-23 18:44:23,999 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 [2020-10-23 18:44:24,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-23 18:44:24,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:44:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:44:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:44:24,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:24,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-23 18:44:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-23 18:44:24,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:44:24,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2020-10-23 18:44:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032291835] [2020-10-23 18:44:24,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:44:24,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:44:24,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:44:24,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:44:24,180 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 15 states. [2020-10-23 18:44:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:44:24,853 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-10-23 18:44:24,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:44:24,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-10-23 18:44:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:44:24,860 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:44:24,860 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:44:24,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:44:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:44:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:44:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:44:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:44:24,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2020-10-23 18:44:24,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:44:24,863 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:44:24,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:44:24,863 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:44:24,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:44:25,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:44:25,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:44:25,501 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 15 [2020-10-23 18:44:25,701 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 15 [2020-10-23 18:44:25,704 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-23 18:44:25,704 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-23 18:44:25,704 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-23 18:44:25,704 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-23 18:44:25,705 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-23 18:44:25,705 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:25,705 INFO L270 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)|)) [2020-10-23 18:44:25,705 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:25,705 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:44:25,705 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:44:25,706 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:44:25,706 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:44:25,706 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-23 18:44:25,707 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:25,707 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:25,708 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-23 18:44:25,708 INFO L274 CegarLoopResult]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2020-10-23 18:44:25,709 INFO L270 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)))) [2020-10-23 18:44:25,709 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-23 18:44:25,709 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 25 40) no Hoare annotation was computed. [2020-10-23 18:44:25,709 INFO L270 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)) [2020-10-23 18:44:25,710 INFO L274 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-10-23 18:44:25,710 INFO L270 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))) [2020-10-23 18:44:25,710 INFO L274 CegarLoopResult]: For program point L37-1(lines 36 37) no Hoare annotation was computed. [2020-10-23 18:44:25,710 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-10-23 18:44:25,710 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-10-23 18:44:25,710 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 25 40) no Hoare annotation was computed. [2020-10-23 18:44:25,710 INFO L277 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-10-23 18:44:25,713 INFO L274 CegarLoopResult]: For program point L34-2(lines 34 37) no Hoare annotation was computed. [2020-10-23 18:44:25,713 INFO L270 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)))) [2020-10-23 18:44:25,714 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-10-23 18:44:25,714 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 25 40) the Hoare annotation is: true [2020-10-23 18:44:25,714 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:25,714 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-23 18:44:25,714 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-23 18:44:25,714 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-23 18:44:25,714 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-23 18:44:25,714 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-23 18:44:25,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:44:25 BoogieIcfgContainer [2020-10-23 18:44:25,745 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:44:25,756 INFO L168 Benchmark]: Toolchain (without parser) took 7521.89 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 135.6 MB in the beginning and 84.7 MB in the end (delta: 50.9 MB). Peak memory consumption was 83.5 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:25,758 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 131.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:44:25,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.00 ms. Allocated memory is still 159.4 MB. Free memory was 134.9 MB in the beginning and 125.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:25,763 INFO L168 Benchmark]: Boogie Preprocessor took 42.81 ms. Allocated memory is still 159.4 MB. Free memory was 125.2 MB in the beginning and 123.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:25,764 INFO L168 Benchmark]: RCFGBuilder took 429.74 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 142.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:25,765 INFO L168 Benchmark]: TraceAbstraction took 6754.91 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 141.5 MB in the beginning and 84.7 MB in the end (delta: 56.8 MB). Peak memory consumption was 88.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:44:25,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 101.3 MB in the beginning and 101.2 MB in the end (delta: 131.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.00 ms. Allocated memory is still 159.4 MB. Free memory was 134.9 MB in the beginning and 125.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.81 ms. Allocated memory is still 159.4 MB. Free memory was 125.2 MB in the beginning and 123.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 429.74 ms. Allocated memory is still 159.4 MB. Free memory was 123.7 MB in the beginning and 142.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6754.91 ms. Allocated memory was 159.4 MB in the beginning and 191.9 MB in the end (delta: 32.5 MB). Free memory was 141.5 MB in the beginning and 84.7 MB in the end (delta: 56.8 MB). Peak memory consumption was 88.8 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: 5.9s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 201 SDslu, 300 SDs, 0 SdLazy, 619 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 250 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 2.0s 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, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1212 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 338 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 327 ConstructedInterpolants, 0 QuantifiedInterpolants, 30857 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...