/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/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:43:10,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:43:10,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:43:11,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:43:11,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:43:11,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:43:11,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:43:11,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:43:11,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:43:11,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:43:11,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:43:11,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:43:11,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:43:11,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:43:11,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:43:11,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:43:11,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:43:11,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:43:11,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:43:11,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:43:11,195 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 18:43:11,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:43:11,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:43:11,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:43:11,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:43:11,253 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:43:11,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:43:11,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:43:11,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:43:11,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:43:11,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:43:11,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:43:11,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:43:11,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:43:11,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:43:11,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:43:11,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:43:11,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:43:11,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:43:11,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:43:11,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:43:11,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:43:11,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:43:11,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:43:11,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:43:11,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:43:11,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:43:11,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:43:11,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:43:11,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:43:11,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:43:11,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:43:11,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:43:11,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:43:11,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:43:11,773 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:43:11,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-23 18:43:11,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b199225/f7ce5188300a42a9a943fbb43a02cc2a/FLAG281c60556 [2020-10-23 18:43:12,431 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:43:12,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-23 18:43:12,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b199225/f7ce5188300a42a9a943fbb43a02cc2a/FLAG281c60556 [2020-10-23 18:43:12,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34b199225/f7ce5188300a42a9a943fbb43a02cc2a [2020-10-23 18:43:12,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:43:12,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:43:12,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:12,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:43:12,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:43:12,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:12" (1/1) ... [2020-10-23 18:43:12,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b885834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:12, skipping insertion in model container [2020-10-23 18:43:12,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:43:12" (1/1) ... [2020-10-23 18:43:12,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:43:12,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:43:13,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:13,022 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:43:13,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:43:13,053 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:43:13,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13 WrapperNode [2020-10-23 18:43:13,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:43:13,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:43:13,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:43:13,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:43:13,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (1/1) ... [2020-10-23 18:43:13,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (1/1) ... [2020-10-23 18:43:13,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (1/1) ... [2020-10-23 18:43:13,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (1/1) ... [2020-10-23 18:43:13,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (1/1) ... [2020-10-23 18:43:13,088 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (1/1) ... [2020-10-23 18:43:13,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (1/1) ... [2020-10-23 18:43:13,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:43:13,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:43:13,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:43:13,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:43:13,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (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 18:43:13,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:43:13,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:43:13,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:43:13,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:43:13,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:43:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:43:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:43:13,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 18:43:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 18:43:13,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:43:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:43:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:43:13,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:43:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:43:13,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:43:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:43:13,648 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:43:13,649 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:43:13,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:13 BoogieIcfgContainer [2020-10-23 18:43:13,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:43:13,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:43:13,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:43:13,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:43:13,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:43:12" (1/3) ... [2020-10-23 18:43:13,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654c9875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:13, skipping insertion in model container [2020-10-23 18:43:13,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:43:13" (2/3) ... [2020-10-23 18:43:13,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654c9875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:43:13, skipping insertion in model container [2020-10-23 18:43:13,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:43:13" (3/3) ... [2020-10-23 18:43:13,664 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-10-23 18:43:13,677 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:43:13,683 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:43:13,702 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:43:13,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:43:13,748 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:43:13,748 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:43:13,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:43:13,749 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:43:13,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:43:13,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:43:13,749 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:43:13,777 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:43:13,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:13,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:13,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:13,787 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:13,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1758911770, now seen corresponding path program 1 times [2020-10-23 18:43:13,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:13,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245799850] [2020-10-23 18:43:13,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:14,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:14,112 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 18:43:14,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245799850] [2020-10-23 18:43:14,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:14,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:43:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017693047] [2020-10-23 18:43:14,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:43:14,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:14,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:43:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:14,147 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-23 18:43:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:14,224 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-10-23 18:43:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:43:14,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-23 18:43:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:14,235 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:43:14,235 INFO L226 Difference]: Without dead ends: 16 [2020-10-23 18:43:14,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:43:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-23 18:43:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-23 18:43:14,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-23 18:43:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-23 18:43:14,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-10-23 18:43:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:14,280 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-23 18:43:14,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:43:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-23 18:43:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:43:14,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:14,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:14,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:43:14,282 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:14,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1363449627, now seen corresponding path program 1 times [2020-10-23 18:43:14,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:14,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132880384] [2020-10-23 18:43:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:14,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:14,424 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 18:43:14,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132880384] [2020-10-23 18:43:14,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:14,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:43:14,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936690072] [2020-10-23 18:43:14,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:14,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:14,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:14,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:14,429 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-10-23 18:43:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:14,670 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-23 18:43:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:14,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-23 18:43:14,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:14,672 INFO L225 Difference]: With dead ends: 24 [2020-10-23 18:43:14,672 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:43:14,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:43:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:43:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:43:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:43:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-23 18:43:14,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-23 18:43:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:14,683 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-23 18:43:14,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-23 18:43:14,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:14,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:14,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:14,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:43:14,685 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash -692636778, now seen corresponding path program 1 times [2020-10-23 18:43:14,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:14,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101627879] [2020-10-23 18:43:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:14,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:14,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101627879] [2020-10-23 18:43:14,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:43:14,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 18:43:14,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067307107] [2020-10-23 18:43:14,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 18:43:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:14,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 18:43:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 18:43:14,770 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-10-23 18:43:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:14,869 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-23 18:43:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 18:43:14,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-23 18:43:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:14,871 INFO L225 Difference]: With dead ends: 29 [2020-10-23 18:43:14,871 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:43:14,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 18:43:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:43:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-23 18:43:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-23 18:43:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-23 18:43:14,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-23 18:43:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:14,890 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-23 18:43:14,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 18:43:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-23 18:43:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:43:14,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:14,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:14,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 18:43:14,893 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:14,894 INFO L82 PathProgramCache]: Analyzing trace with hash -12578408, now seen corresponding path program 1 times [2020-10-23 18:43:14,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:14,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743431423] [2020-10-23 18:43:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:15,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:15,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743431423] [2020-10-23 18:43:15,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302839231] [2020-10-23 18:43:15,156 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 18:43:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:15,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:43:15,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:15,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:15,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:15,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-10-23 18:43:15,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729543276] [2020-10-23 18:43:15,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:43:15,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:43:15,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:43:15,532 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 14 states. [2020-10-23 18:43:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:15,945 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-23 18:43:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:43:15,946 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-10-23 18:43:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:15,947 INFO L225 Difference]: With dead ends: 27 [2020-10-23 18:43:15,947 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:43:15,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:43:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:43:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:43:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:43:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:43:15,961 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-10-23 18:43:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:15,961 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:43:15,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:43:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:43:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:43:15,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:15,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:16,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:16,179 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1519012857, now seen corresponding path program 1 times [2020-10-23 18:43:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:16,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845850465] [2020-10-23 18:43:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:16,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:16,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845850465] [2020-10-23 18:43:16,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782935256] [2020-10-23 18:43:16,251 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 18:43:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-23 18:43:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:16,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:16,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-23 18:43:16,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565254778] [2020-10-23 18:43:16,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:43:16,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:43:16,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:43:16,338 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-23 18:43:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:16,448 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-23 18:43:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 18:43:16,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-23 18:43:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:16,450 INFO L225 Difference]: With dead ends: 32 [2020-10-23 18:43:16,451 INFO L226 Difference]: Without dead ends: 22 [2020-10-23 18:43:16,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:43:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-23 18:43:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-23 18:43:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 18:43:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-23 18:43:16,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-23 18:43:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:16,458 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-23 18:43:16,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:43:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-23 18:43:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-23 18:43:16,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:16,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:16,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:16,678 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2095896069, now seen corresponding path program 2 times [2020-10-23 18:43:16,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:16,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640543091] [2020-10-23 18:43:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:16,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640543091] [2020-10-23 18:43:16,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198810330] [2020-10-23 18:43:16,961 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 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 18:43:17,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:17,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-23 18:43:17,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:17,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:17,190 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-23 18:43:17,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:17,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:43:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:17,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:17,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2020-10-23 18:43:17,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336461843] [2020-10-23 18:43:17,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:43:17,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:43:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:43:17,248 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2020-10-23 18:43:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:18,064 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-23 18:43:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:43:18,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-10-23 18:43:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:18,069 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:43:18,069 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:43:18,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2020-10-23 18:43:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:43:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:43:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:43:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-23 18:43:18,076 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2020-10-23 18:43:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:18,076 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-23 18:43:18,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:43:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-23 18:43:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-23 18:43:18,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:18,078 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:18,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:18,292 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash -319998794, now seen corresponding path program 2 times [2020-10-23 18:43:18,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:18,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034717081] [2020-10-23 18:43:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:18,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:43:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:43:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:18,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034717081] [2020-10-23 18:43:18,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223560643] [2020-10-23 18:43:18,364 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 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 18:43:18,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:43:18,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:43:18,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-23 18:43:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:43:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:43:18,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:43:18,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-23 18:43:18,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699954363] [2020-10-23 18:43:18,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:43:18,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:43:18,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:43:18,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:43:18,446 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2020-10-23 18:43:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:43:18,596 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-23 18:43:18,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:43:18,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-23 18:43:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:43:18,597 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:43:18,597 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:43:18,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:43:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:43:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:43:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:43:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:43:18,604 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-23 18:43:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:43:18,604 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:43:18,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:43:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:43:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 18:43:18,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:43:18,605 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:43:18,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:43:18,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:43:18,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:43:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash 286734041, now seen corresponding path program 3 times [2020-10-23 18:43:18,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:43:18,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654462557] [2020-10-23 18:43:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:43:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:18,841 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:43:18,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:43:18,884 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:43:18,884 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:43:18,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 18:43:18,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:43:18 BoogieIcfgContainer [2020-10-23 18:43:18,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:43:18,928 INFO L168 Benchmark]: Toolchain (without parser) took 6143.33 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 116.9 MB in the beginning and 93.1 MB in the end (delta: 23.8 MB). Peak memory consumption was 57.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:18,929 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 160.4 MB. Free memory was 133.1 MB in the beginning and 133.0 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:43:18,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.75 ms. Allocated memory is still 160.4 MB. Free memory was 143.2 MB in the beginning and 134.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:18,932 INFO L168 Benchmark]: Boogie Preprocessor took 36.18 ms. Allocated memory is still 160.4 MB. Free memory was 134.1 MB in the beginning and 132.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:18,933 INFO L168 Benchmark]: RCFGBuilder took 558.41 ms. Allocated memory is still 160.4 MB. Free memory was 132.5 MB in the beginning and 130.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:18,938 INFO L168 Benchmark]: TraceAbstraction took 5271.24 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 129.9 MB in the beginning and 93.1 MB in the end (delta: 36.8 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:43:18,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 160.4 MB. Free memory was 133.1 MB in the beginning and 133.0 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.75 ms. Allocated memory is still 160.4 MB. Free memory was 143.2 MB in the beginning and 134.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.18 ms. Allocated memory is still 160.4 MB. Free memory was 134.1 MB in the beginning and 132.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 558.41 ms. Allocated memory is still 160.4 MB. Free memory was 132.5 MB in the beginning and 130.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5271.24 ms. Allocated memory was 160.4 MB in the beginning and 192.9 MB in the end (delta: 32.5 MB). Free memory was 129.9 MB in the beginning and 93.1 MB in the end (delta: 36.8 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=4, n=0] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=1, n=4, n=2] [L26] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L24] i++ VAL [i=2, n=2, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=2, n=4, n=4] [L26] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L24] i++ VAL [i=3, n=4, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=3, n=6, n=4] [L26] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L24] i++ VAL [i=4, n=6, n=4] [L24] COND TRUE i<=n [L25] sn = sn + (2) VAL [i=4, n=8, n=4] [L26] COND TRUE i==4 [L26] sn=-10 VAL [i=4, n=-10, n=4] [L24] i++ VAL [i=5, n=-10, n=4] [L24] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01_bug02_sum01_bug02_base.case.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 115 SDslu, 168 SDs, 0 SdLazy, 374 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, 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, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 183 ConstructedInterpolants, 0 QuantifiedInterpolants, 12603 SizeOfPredicates, 8 NumberOfNonLiveVariables, 370 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 17/47 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 incorrect! Received shutdown request...