/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:46:28,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:46:28,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:46:29,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:46:29,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:46:29,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:46:29,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:46:29,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:46:29,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:46:29,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:46:29,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:46:29,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:46:29,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:46:29,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:46:29,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:46:29,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:46:29,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:46:29,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:46:29,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:46:29,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:46:29,152 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 [2021-05-02 12:46:29,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:46:29,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:46:29,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:46:29,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:46:29,200 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:46:29,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:46:29,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:46:29,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:46:29,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:46:29,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:46:29,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:46:29,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:46:29,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:46:29,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:46:29,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:46:29,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:46:29,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:46:29,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:46:29,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:46:29,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:46:29,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:46:29,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:46:29,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:46:29,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:46:29,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:46:29,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:46:29,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:46:29,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:46:29,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:46:29,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:46:29,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:46:29,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:46:29,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:46:29,676 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:46:29,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2021-05-02 12:46:29,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fa0b344/87bbd09efb9d4051aebca52d9699c6d2/FLAG4c534c37d [2021-05-02 12:46:30,430 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:46:30,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2021-05-02 12:46:30,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fa0b344/87bbd09efb9d4051aebca52d9699c6d2/FLAG4c534c37d [2021-05-02 12:46:30,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8fa0b344/87bbd09efb9d4051aebca52d9699c6d2 [2021-05-02 12:46:30,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:46:30,754 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:46:30,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:46:30,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:46:30,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:46:30,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:46:30" (1/1) ... [2021-05-02 12:46:30,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e526ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:30, skipping insertion in model container [2021-05-02 12:46:30,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:46:30" (1/1) ... [2021-05-02 12:46:30,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:46:30,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:46:31,098 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2021-05-02 12:46:31,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:46:31,156 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:46:31,210 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2021-05-02 12:46:31,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:46:31,226 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:46:31,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31 WrapperNode [2021-05-02 12:46:31,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:46:31,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:46:31,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:46:31,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:46:31,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (1/1) ... [2021-05-02 12:46:31,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (1/1) ... [2021-05-02 12:46:31,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (1/1) ... [2021-05-02 12:46:31,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (1/1) ... [2021-05-02 12:46:31,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (1/1) ... [2021-05-02 12:46:31,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (1/1) ... [2021-05-02 12:46:31,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (1/1) ... [2021-05-02 12:46:31,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:46:31,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:46:31,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:46:31,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:46:31,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (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 [2021-05-02 12:46:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:46:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:46:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:46:31,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:46:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:46:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:46:31,407 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-05-02 12:46:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:46:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:46:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:46:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:46:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:46:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-05-02 12:46:32,174 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:46:32,176 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-02 12:46:32,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:46:32 BoogieIcfgContainer [2021-05-02 12:46:32,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:46:32,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:46:32,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:46:32,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:46:32,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:46:30" (1/3) ... [2021-05-02 12:46:32,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394e2d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:46:32, skipping insertion in model container [2021-05-02 12:46:32,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:46:31" (2/3) ... [2021-05-02 12:46:32,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394e2d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:46:32, skipping insertion in model container [2021-05-02 12:46:32,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:46:32" (3/3) ... [2021-05-02 12:46:32,191 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2021-05-02 12:46:32,199 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:46:32,203 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:46:32,221 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:46:32,249 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:46:32,250 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:46:32,250 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:46:32,250 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:46:32,250 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:46:32,250 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:46:32,250 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:46:32,250 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:46:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:46:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:46:32,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:32,266 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:32,266 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash -63360149, now seen corresponding path program 1 times [2021-05-02 12:46:32,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:32,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972678698] [2021-05-02 12:46:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:32,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:46:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:32,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:32,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972678698] [2021-05-02 12:46:32,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972678698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:46:32,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:46:32,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 12:46:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301427303] [2021-05-02 12:46:32,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 12:46:32,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:32,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 12:46:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:46:32,829 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:33,066 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-05-02 12:46:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:46:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:46:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:33,074 INFO L225 Difference]: With dead ends: 38 [2021-05-02 12:46:33,074 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 12:46:33,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:46:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 12:46:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-05-02 12:46:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 12:46:33,115 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2021-05-02 12:46:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:33,116 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 12:46:33,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 12:46:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 12:46:33,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:33,118 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:33,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:46:33,119 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2033873229, now seen corresponding path program 1 times [2021-05-02 12:46:33,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:33,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244656950] [2021-05-02 12:46:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:33,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:46:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:33,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244656950] [2021-05-02 12:46:33,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244656950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:33,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053408127] [2021-05-02 12:46:33,364 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 [2021-05-02 12:46:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:33,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:46:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:46:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:33,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053408127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:33,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:46:33,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 12:46:33,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424496181] [2021-05-02 12:46:33,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:46:33,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:46:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:46:33,722 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:33,922 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-02 12:46:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:46:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 12:46:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:33,923 INFO L225 Difference]: With dead ends: 29 [2021-05-02 12:46:33,923 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 12:46:33,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:46:33,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 12:46:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-05-02 12:46:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 12:46:33,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2021-05-02 12:46:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:33,938 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 12:46:33,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 12:46:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 12:46:33,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:33,942 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:34,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 12:46:34,161 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:34,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2006384747, now seen corresponding path program 2 times [2021-05-02 12:46:34,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:34,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287349737] [2021-05-02 12:46:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:34,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:46:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:34,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287349737] [2021-05-02 12:46:34,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287349737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478968161] [2021-05-02 12:46:34,352 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 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 [2021-05-02 12:46:34,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:46:34,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:46:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:46:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:46:34,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:34,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478968161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:34,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:46:34,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 12:46:34,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576914081] [2021-05-02 12:46:34,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:46:34,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:34,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:46:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:46:34,684 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:34,930 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 12:46:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:46:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 12:46:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:34,932 INFO L225 Difference]: With dead ends: 34 [2021-05-02 12:46:34,932 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 12:46:34,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:46:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 12:46:34,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-05-02 12:46:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 12:46:34,943 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2021-05-02 12:46:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:34,943 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 12:46:34,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 12:46:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 12:46:34,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:34,945 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:35,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:35,153 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1862263219, now seen corresponding path program 3 times [2021-05-02 12:46:35,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:35,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641372787] [2021-05-02 12:46:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:35,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:46:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:35,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:35,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641372787] [2021-05-02 12:46:35,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641372787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:35,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912833819] [2021-05-02 12:46:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-05-02 12:46:35,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 12:46:35,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:46:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 12:46:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:46:35,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:35,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:35,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:46:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-05-02 12:46:35,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-02 12:46:35,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:46:35,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:46:35,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:18 [2021-05-02 12:46:35,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:36,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:36,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:36,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:36,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 12:46:36,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912833819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:36,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:46:36,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-02 12:46:36,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125178612] [2021-05-02 12:46:36,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:46:36,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:36,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:46:36,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:46:36,131 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:36,798 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-05-02 12:46:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 12:46:36,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 12:46:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:36,799 INFO L225 Difference]: With dead ends: 39 [2021-05-02 12:46:36,799 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:46:36,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-05-02 12:46:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:46:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:46:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 12:46:36,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:46:36,801 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-05-02 12:46:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:36,801 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:46:36,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:46:36,801 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:46:37,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:37,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:46:37,221 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 12:46:37,221 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 12:46:37,222 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 12:46:37,222 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:46:37,222 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string8.offset| |old(#t~string8.offset)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#t~string7.offset| |old(#t~string7.offset)|) (= |old(#valid)| |#valid|) (= |#t~string51.base| |old(#t~string51.base)|) (= |#t~string5.base| |old(#t~string5.base)|) (= ~Id_MCDC_93~0 |old(~Id_MCDC_93~0)|) (= |#t~string51.offset| |old(#t~string51.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#t~string8.base| |old(#t~string8.base)|) (= ~__return_main~0 |old(~__return_main~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |#t~string7.base| |old(#t~string7.base)|)) [2021-05-02 12:46:37,222 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:46:37,222 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:46:37,222 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~Id_MCDC_93~0 0) [2021-05-02 12:46:37,222 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:46:37,222 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:46:37,222 INFO L198 CegarLoopUtils]: For program point L161(lines 161 236) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point L190(lines 190 208) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point L221(line 221) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point L219(lines 219 227) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 133 237) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point L182(lines 182 229) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point L180(lines 180 234) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 133 237) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point L197(lines 197 207) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L198 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 221) no Hoare annotation was computed. [2021-05-02 12:46:37,223 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 133 237) the Hoare annotation is: (or (and (= ~Id_MCDC_93~0 |old(~Id_MCDC_93~0)|) (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) (not (= |old(~Id_MCDC_93~0)| 0))) [2021-05-02 12:46:37,224 INFO L194 CegarLoopUtils]: At program point L202(lines 167 235) the Hoare annotation is: (let ((.cse0 (= (select (select |#memory_int| |main_~#Id_MCDC_89__Id_MCDC_95~0.base|) (+ |main_~#Id_MCDC_89__Id_MCDC_95~0.offset| 492)) 0))) (or (and (<= main_~Id_MCDC_89__Id_MCDC_96~0 1) (< 0 (+ (div ~Id_MCDC_93~0 4294967296) 1)) (<= ~Id_MCDC_93~0 2) (<= 1 main_~Id_MCDC_89__Id_MCDC_96~0) .cse0) (not (= |old(~Id_MCDC_93~0)| 0)) (and (= ~Id_MCDC_93~0 0) (= main_~Id_MCDC_89__Id_MCDC_96~0 0) .cse0) (let ((.cse2 (mod (+ main_~Id_MCDC_89__Id_MCDC_96~0 4294967295) 4294967296)) (.cse1 (mod (+ ~Id_MCDC_93~0 4294967295) 4294967296))) (and (< .cse1 42) (< .cse2 42) (not (= 492 (* .cse2 12))) (not (= 492 (* .cse1 12))) .cse0)))) [2021-05-02 12:46:37,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:46:37 BoogieIcfgContainer [2021-05-02 12:46:37,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:46:37,246 INFO L168 Benchmark]: Toolchain (without parser) took 6489.69 ms. Allocated memory was 194.0 MB in the beginning and 253.8 MB in the end (delta: 59.8 MB). Free memory was 157.7 MB in the beginning and 157.7 MB in the end (delta: -62.1 kB). Peak memory consumption was 61.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:46:37,246 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 194.0 MB. Free memory is still 174.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:46:37,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.48 ms. Allocated memory is still 194.0 MB. Free memory was 157.5 MB in the beginning and 172.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2021-05-02 12:46:37,246 INFO L168 Benchmark]: Boogie Preprocessor took 76.70 ms. Allocated memory is still 194.0 MB. Free memory was 172.5 MB in the beginning and 168.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 12:46:37,247 INFO L168 Benchmark]: RCFGBuilder took 872.27 ms. Allocated memory is still 194.0 MB. Free memory was 168.8 MB in the beginning and 94.9 MB in the end (delta: 73.9 MB). Peak memory consumption was 74.4 MB. Max. memory is 8.0 GB. [2021-05-02 12:46:37,247 INFO L168 Benchmark]: TraceAbstraction took 5060.18 ms. Allocated memory was 194.0 MB in the beginning and 253.8 MB in the end (delta: 59.8 MB). Free memory was 94.3 MB in the beginning and 157.7 MB in the end (delta: -63.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:46:37,247 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 194.0 MB. Free memory is still 174.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 468.48 ms. Allocated memory is still 194.0 MB. Free memory was 157.5 MB in the beginning and 172.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.70 ms. Allocated memory is still 194.0 MB. Free memory was 172.5 MB in the beginning and 168.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 872.27 ms. Allocated memory is still 194.0 MB. Free memory was 168.8 MB in the beginning and 94.9 MB in the end (delta: 73.9 MB). Peak memory consumption was 74.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5060.18 ms. Allocated memory was 194.0 MB in the beginning and 253.8 MB in the end (delta: 59.8 MB). Free memory was 94.3 MB in the beginning and 157.7 MB in the end (delta: -63.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 221]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4762.3ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 8.3ms, AutomataDifference: 1385.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 210.8ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 50 SDtfs, 112 SDslu, 130 SDs, 0 SdLazy, 295 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 440.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1218.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 47.2ms AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 10 NumberOfFragments, 165 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 19.4ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 268 FormulaSimplificationTreeSizeReductionInter, 182.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 124.0ms SsaConstructionTime, 847.3ms SatisfiabilityAnalysisTime, 1389.4ms InterpolantComputationTime, 144 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 840 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1457 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 13/76 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 167]: Loop Invariant Derived loop invariant: ((((((Id_MCDC_89__Id_MCDC_96 <= 1 && 0 < Id_MCDC_93 / 4294967296 + 1) && Id_MCDC_93 <= 2) && 1 <= Id_MCDC_89__Id_MCDC_96) && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0) || !(\old(Id_MCDC_93) == 0)) || ((Id_MCDC_93 == 0 && Id_MCDC_89__Id_MCDC_96 == 0) && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0)) || (((((Id_MCDC_93 + 4294967295) % 4294967296 < 42 && (Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296 < 42) && !(492 == (Id_MCDC_89__Id_MCDC_96 + 4294967295) % 4294967296 * 12)) && !(492 == (Id_MCDC_93 + 4294967295) % 4294967296 * 12)) && unknown-#memory_int-unknown[Id_MCDC_89__Id_MCDC_95][Id_MCDC_89__Id_MCDC_95 + 492] == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...