/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/nla-digbench-scaling/ps4-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:55:16,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:55:16,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:55:16,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:55:16,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:55:16,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:55:16,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:55:16,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:55:16,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:55:16,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:55:16,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:55:16,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:55:16,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:55:16,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:55:16,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:55:16,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:55:16,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:55:16,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:55:16,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:55:16,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:55:16,309 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 16:55:16,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:55:16,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:55:16,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:55:16,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:55:16,351 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:55:16,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:55:16,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:55:16,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:55:16,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:55:16,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:55:16,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:55:16,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:55:16,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:55:16,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:55:16,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:55:16,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:55:16,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:55:16,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:55:16,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:55:16,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:55:16,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:55:16,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:55:16,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:55:16,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:55:16,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:55:16,585 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:55:16,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound1.c [2021-05-02 16:55:16,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b43fd69b/efe601164a4944cf9f453d91e551debd/FLAGd10cc9c62 [2021-05-02 16:55:16,964 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:55:16,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound1.c [2021-05-02 16:55:16,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b43fd69b/efe601164a4944cf9f453d91e551debd/FLAGd10cc9c62 [2021-05-02 16:55:16,983 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b43fd69b/efe601164a4944cf9f453d91e551debd [2021-05-02 16:55:16,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:55:16,988 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:55:16,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:55:16,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:55:16,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:55:16,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:55:16" (1/1) ... [2021-05-02 16:55:16,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7baec780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:16, skipping insertion in model container [2021-05-02 16:55:16,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:55:16" (1/1) ... [2021-05-02 16:55:16,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:55:17,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:55:17,088 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound1.c[458,471] [2021-05-02 16:55:17,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:55:17,101 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:55:17,152 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound1.c[458,471] [2021-05-02 16:55:17,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:55:17,165 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:55:17,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17 WrapperNode [2021-05-02 16:55:17,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:55:17,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:55:17,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:55:17,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:55:17,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (1/1) ... [2021-05-02 16:55:17,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (1/1) ... [2021-05-02 16:55:17,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (1/1) ... [2021-05-02 16:55:17,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (1/1) ... [2021-05-02 16:55:17,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (1/1) ... [2021-05-02 16:55:17,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (1/1) ... [2021-05-02 16:55:17,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (1/1) ... [2021-05-02 16:55:17,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:55:17,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:55:17,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:55:17,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:55:17,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (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 16:55:17,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:55:17,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:55:17,238 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:55:17,238 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:55:17,238 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:55:17,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:55:17,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:55:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:55:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:55:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:55:17,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:55:17,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:55:17,449 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:55:17,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:55:17 BoogieIcfgContainer [2021-05-02 16:55:17,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:55:17,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:55:17,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:55:17,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:55:17,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:55:16" (1/3) ... [2021-05-02 16:55:17,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547894d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:55:17, skipping insertion in model container [2021-05-02 16:55:17,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:55:17" (2/3) ... [2021-05-02 16:55:17,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547894d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:55:17, skipping insertion in model container [2021-05-02 16:55:17,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:55:17" (3/3) ... [2021-05-02 16:55:17,455 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound1.c [2021-05-02 16:55:17,475 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:55:17,478 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:55:17,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:55:17,520 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:55:17,520 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:55:17,520 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:55:17,536 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:55:17,537 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:55:17,537 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:55:17,537 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:55:17,537 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:55:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:55:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:55:17,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:55:17,565 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:55:17,565 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:55:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:55:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-02 16:55:17,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:55:17,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288688164] [2021-05-02 16:55:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:55:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:55:17,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:55:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:55:17,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:55:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:55:17,786 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 16:55:17,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:55:17,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288688164] [2021-05-02 16:55:17,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288688164] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:55:17,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:55:17,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:55:17,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811223867] [2021-05-02 16:55:17,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:55:17,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:55:17,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:55:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:55:17,804 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:55:19,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:55:19,924 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-02 16:55:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:55:19,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:55:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:55:19,932 INFO L225 Difference]: With dead ends: 47 [2021-05-02 16:55:19,932 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 16:55:19,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:55:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 16:55:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 16:55:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:55:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-02 16:55:19,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-02 16:55:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:55:19,994 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-02 16:55:19,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:55:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-02 16:55:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:55:19,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:55:19,995 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:55:19,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:55:19,996 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:55:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:55:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-02 16:55:19,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:55:19,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529921185] [2021-05-02 16:55:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:55:20,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:55:20,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628125815] [2021-05-02 16:55:20,010 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 16:55:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:55:20,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:55:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:55:20,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:20,184 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 16:55:20,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:55:20,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529921185] [2021-05-02 16:55:20,185 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:55:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628125815] [2021-05-02 16:55:20,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628125815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:55:20,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:55:20,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:55:20,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199605716] [2021-05-02 16:55:20,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:55:20,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:55:20,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:55:20,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:55:20,187 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:55:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:55:20,239 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 16:55:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:55:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:55:20,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:55:20,241 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:55:20,241 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 16:55:20,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:55:20,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 16:55:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 16:55:20,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:55:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 16:55:20,248 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-02 16:55:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:55:20,248 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 16:55:20,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:55:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 16:55:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 16:55:20,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:55:20,249 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:55:20,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:55:20,463 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:55:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:55:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2021-05-02 16:55:20,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:55:20,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175013844] [2021-05-02 16:55:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:55:20,473 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:55:20,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801534797] [2021-05-02 16:55:20,473 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 [2021-05-02 16:55:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:55:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:55:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:55:20,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:20,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:55:20,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:55:20,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175013844] [2021-05-02 16:55:20,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:55:20,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801534797] [2021-05-02 16:55:20,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801534797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:55:20,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:55:20,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:55:20,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228941247] [2021-05-02 16:55:20,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:55:20,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:55:20,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:55:20,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:55:20,613 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:55:20,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:55:20,672 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-02 16:55:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:55:20,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 16:55:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:55:20,673 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:55:20,673 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 16:55:20,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:55:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 16:55:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 16:55:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:55:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 16:55:20,679 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 24 [2021-05-02 16:55:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:55:20,679 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 16:55:20,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:55:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 16:55:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 16:55:20,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:55:20,680 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:55:20,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:55:20,895 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:55:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:55:20,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2021-05-02 16:55:20,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:55:20,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965183019] [2021-05-02 16:55:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:55:20,905 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:55:20,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954851982] [2021-05-02 16:55:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:55:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:55:20,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:55:20,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:55:21,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:55:21,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:55:21,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965183019] [2021-05-02 16:55:21,116 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:55:21,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954851982] [2021-05-02 16:55:21,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954851982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:55:21,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:55:21,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:55:21,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352049260] [2021-05-02 16:55:21,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:55:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:55:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:55:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:55:21,117 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:55:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:55:21,191 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-02 16:55:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:55:21,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-02 16:55:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:55:21,192 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:55:21,192 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 16:55:21,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:55:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 16:55:21,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 16:55:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:55:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-05-02 16:55:21,198 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2021-05-02 16:55:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:55:21,198 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-05-02 16:55:21,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:55:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-05-02 16:55:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 16:55:21,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:55:21,199 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:55:21,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:55:21,415 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:55:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:55:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash -965543213, now seen corresponding path program 2 times [2021-05-02 16:55:21,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:55:21,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264765210] [2021-05-02 16:55:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:55:21,423 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:55:21,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533762166] [2021-05-02 16:55:21,423 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 [2021-05-02 16:55:21,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:55:21,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:55:21,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 16:55:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:55:21,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:55:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:55:21,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:55:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264765210] [2021-05-02 16:55:21,590 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:55:21,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533762166] [2021-05-02 16:55:21,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533762166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:55:21,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:55:21,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:55:21,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287664000] [2021-05-02 16:55:21,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:55:21,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:55:21,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:55:21,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:55:21,591 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:55:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:55:21,620 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-02 16:55:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:55:21,621 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 16:55:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:55:21,621 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:55:21,621 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 16:55:21,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:55:21,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 16:55:21,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 16:55:21,622 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 16:55:21,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 16:55:21,622 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-02 16:55:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:55:21,622 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 16:55:21,622 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:55:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 16:55:21,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 16:55:21,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:55:21,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 16:55:22,198 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 16:55:22,198 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 16:55:22,198 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 16:55:22,199 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:55:22,200 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#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~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 16:55:22,200 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:55:22,200 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:55:22,200 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 16:55:22,200 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 16:55:22,200 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:55:22,200 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-02 16:55:22,200 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 16:55:22,200 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:55:22,201 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:55:22,201 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2021-05-02 16:55:22,201 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1))) (or (and .cse0 (<= 0 main_~k~0) (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)) (and (<= 1 main_~c~0) .cse0 (= main_~y~0 1) (= (* main_~y~0 main_~y~0 main_~y~0) main_~x~0) (< 0 main_~k~0)))) [2021-05-02 16:55:22,201 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-02 16:55:22,202 INFO L194 CegarLoopUtils]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1))) (or (and .cse0 (<= 0 main_~k~0) (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)) (and (<= 1 main_~c~0) .cse0 (= main_~y~0 1) (= (* main_~y~0 main_~y~0 main_~y~0) main_~x~0) (< 0 main_~k~0)))) [2021-05-02 16:55:22,202 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2021-05-02 16:55:22,202 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (and (<= main_~k~0 1) (= main_~y~0 1) (= (* main_~y~0 main_~y~0 main_~y~0) main_~x~0) (< 0 main_~k~0)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 16:55:22,202 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-02 16:55:22,202 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-02 16:55:22,202 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2021-05-02 16:55:22,202 INFO L198 CegarLoopUtils]: For program point L38(line 38) no Hoare annotation was computed. [2021-05-02 16:55:22,202 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (or (and (= main_~y~0 1) (= (* main_~y~0 main_~y~0 main_~y~0) main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 16:55:22,202 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 16:55:22,202 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 16:55:22,202 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 16:55:22,203 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:55:22,203 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:55:22,203 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 16:55:22,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:55:22 BoogieIcfgContainer [2021-05-02 16:55:22,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:55:22,230 INFO L168 Benchmark]: Toolchain (without parser) took 5242.58 ms. Allocated memory was 218.1 MB in the beginning and 305.1 MB in the end (delta: 87.0 MB). Free memory was 183.2 MB in the beginning and 253.9 MB in the end (delta: -70.8 MB). Peak memory consumption was 108.8 MB. Max. memory is 8.0 GB. [2021-05-02 16:55:22,230 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 218.1 MB. Free memory is still 199.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:55:22,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.37 ms. Allocated memory is still 218.1 MB. Free memory was 183.0 MB in the beginning and 200.0 MB in the end (delta: -17.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 16:55:22,230 INFO L168 Benchmark]: Boogie Preprocessor took 18.73 ms. Allocated memory is still 218.1 MB. Free memory was 200.0 MB in the beginning and 198.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 16:55:22,230 INFO L168 Benchmark]: RCFGBuilder took 264.88 ms. Allocated memory is still 218.1 MB. Free memory was 197.9 MB in the beginning and 182.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:55:22,231 INFO L168 Benchmark]: TraceAbstraction took 4778.61 ms. Allocated memory was 218.1 MB in the beginning and 305.1 MB in the end (delta: 87.0 MB). Free memory was 182.1 MB in the beginning and 253.9 MB in the end (delta: -71.8 MB). Peak memory consumption was 108.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:55:22,231 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 218.1 MB. Free memory is still 199.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 176.37 ms. Allocated memory is still 218.1 MB. Free memory was 183.0 MB in the beginning and 200.0 MB in the end (delta: -17.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.73 ms. Allocated memory is still 218.1 MB. Free memory was 200.0 MB in the beginning and 198.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 264.88 ms. Allocated memory is still 218.1 MB. Free memory was 197.9 MB in the beginning and 182.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4778.61 ms. Allocated memory was 218.1 MB in the beginning and 305.1 MB in the end (delta: 87.0 MB). Free memory was 182.1 MB in the beginning and 253.9 MB in the end (delta: -71.8 MB). Peak memory consumption was 108.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4320.0ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 22.0ms, AutomataDifference: 2366.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 359.3ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 113 SDtfs, 48 SDslu, 415 SDs, 0 SdLazy, 196 SolverSat, 18 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2166.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 214.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 66.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 22 PreInvPairs, 30 NumberOfFragments, 151 HoareAnnotationTreeSize, 22 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 88.1ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 374 FormulaSimplificationTreeSizeReductionInter, 263.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 28.5ms SsaConstructionTime, 86.7ms SatisfiabilityAnalysisTime, 592.0ms InterpolantComputationTime, 119 NumberOfCodeBlocks, 119 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 374 SizeOfPredicates, 10 NumberOfNonLiveVariables, 486 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 25/30 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: 27]: Loop Invariant Derived loop invariant: ((((k <= 1 && 0 <= k) && y == 0) && 0 <= c) && x == 0) || ((((1 <= c && k <= 1) && y == 1) && y * y * y == x) && 0 < k) RESULT: Ultimate proved your program to be correct! Received shutdown request...