/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/ps5-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:04:20,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:04:20,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:04:20,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:04:20,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:04:20,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:04:20,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:04:20,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:04:20,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:04:20,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:04:20,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:04:20,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:04:20,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:04:20,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:04:20,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:04:20,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:04:20,152 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:04:20,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:04:20,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:04:20,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:04:20,180 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 17:04:20,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:04:20,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:04:20,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:04:20,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:04:20,210 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:04:20,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:04:20,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:04:20,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:04:20,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:04:20,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:04:20,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:04:20,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:04:20,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:04:20,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:04:20,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:04:20,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:04:20,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:04:20,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:04:20,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:04:20,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:04:20,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:04:20,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:04:20,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:04:20,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:04:20,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:04:20,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:04:20,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:04:20,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:04:20,214 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:04:20,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:04:20,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:04:20,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:04:20,490 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:04:20,491 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:04:20,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound1.c [2021-05-02 17:04:20,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bdb2953/cfc90f0836f242f98959405273b67756/FLAGbb0907e8a [2021-05-02 17:04:20,932 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:04:20,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound1.c [2021-05-02 17:04:20,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bdb2953/cfc90f0836f242f98959405273b67756/FLAGbb0907e8a [2021-05-02 17:04:20,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8bdb2953/cfc90f0836f242f98959405273b67756 [2021-05-02 17:04:20,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:04:20,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:04:20,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:04:20,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:04:20,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:04:20,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:04:20" (1/1) ... [2021-05-02 17:04:20,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a23435e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:20, skipping insertion in model container [2021-05-02 17:04:20,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:04:20" (1/1) ... [2021-05-02 17:04:20,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:04:20,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:04:21,040 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/ps5-ll_valuebound1.c[458,471] [2021-05-02 17:04:21,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:04:21,053 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:04:21,060 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/ps5-ll_valuebound1.c[458,471] [2021-05-02 17:04:21,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:04:21,108 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:04:21,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21 WrapperNode [2021-05-02 17:04:21,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:04:21,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:04:21,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:04:21,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:04:21,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (1/1) ... [2021-05-02 17:04:21,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (1/1) ... [2021-05-02 17:04:21,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (1/1) ... [2021-05-02 17:04:21,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (1/1) ... [2021-05-02 17:04:21,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (1/1) ... [2021-05-02 17:04:21,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (1/1) ... [2021-05-02 17:04:21,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (1/1) ... [2021-05-02 17:04:21,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:04:21,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:04:21,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:04:21,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:04:21,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (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 17:04:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:04:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:04:21,190 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:04:21,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:04:21,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:04:21,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:04:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:04:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:04:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:04:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:04:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:04:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:04:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:04:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:04:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:04:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:04:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:04:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:04:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:04:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:04:21,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:04:21,426 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:04:21,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:04:21 BoogieIcfgContainer [2021-05-02 17:04:21,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:04:21,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:04:21,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:04:21,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:04:21,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:04:20" (1/3) ... [2021-05-02 17:04:21,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13285b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:04:21, skipping insertion in model container [2021-05-02 17:04:21,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:04:21" (2/3) ... [2021-05-02 17:04:21,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13285b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:04:21, skipping insertion in model container [2021-05-02 17:04:21,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:04:21" (3/3) ... [2021-05-02 17:04:21,432 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound1.c [2021-05-02 17:04:21,448 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:04:21,451 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:04:21,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:04:21,493 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:04:21,493 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:04:21,493 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:04:21,493 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:04:21,493 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:04:21,493 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:04:21,493 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:04:21,493 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:04:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:04:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:04:21,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:04:21,523 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:04:21,523 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:04:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:04:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-02 17:04:21,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:04:21,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458793315] [2021-05-02 17:04:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:04:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:04:21,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:04:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:04:21,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:04:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:04:21,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 17:04:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:04:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:04:21,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:04:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458793315] [2021-05-02 17:04:21,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458793315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:04:21,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:04:21,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:04:21,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091562658] [2021-05-02 17:04:21,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:04:21,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:04:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:04:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:04:21,797 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 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 17:04:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:04:21,854 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-02 17:04:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:04:21,856 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, (5), 3 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 22 [2021-05-02 17:04:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:04:21,860 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:04:21,860 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:04:21,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:04:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:04:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 17:04:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:04:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:04:21,888 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 17:04:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:04:21,905 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:04:21,905 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, (5), 3 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 17:04:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:04:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:04:21,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:04:21,907 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:04:21,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:04:21,908 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:04:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:04:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-02 17:04:21,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:04:21,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242820695] [2021-05-02 17:04:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:04:21,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:04:21,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031305072] [2021-05-02 17:04:21,953 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 17:04:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:04:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:04:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:04:22,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:04:22,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:04:22,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242820695] [2021-05-02 17:04:22,198 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:04:22,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031305072] [2021-05-02 17:04:22,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031305072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:04:22,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:04:22,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:04:22,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916607181] [2021-05-02 17:04:22,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:04:22,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:04:22,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:04:22,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:04:22,214 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:04:22,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:04:22,314 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 17:04:22,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:04:22,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 17:04:22,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:04:22,316 INFO L225 Difference]: With dead ends: 35 [2021-05-02 17:04:22,316 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 17:04:22,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:04:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 17:04:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 17:04:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:04:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 17:04:22,335 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 17:04:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:04:22,335 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 17:04:22,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:04:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 17:04:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:04:22,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:04:22,336 INFO L523 BasicCegarLoop]: trace histogram [2, 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 17:04:22,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:04:22,537 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:04:22,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:04:22,538 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-02 17:04:22,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:04:22,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258424267] [2021-05-02 17:04:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:04:22,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:04:22,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724476472] [2021-05-02 17:04:22,547 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 17:04:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:04:22,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:04:22,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:04:22,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:04:22,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:04:22,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258424267] [2021-05-02 17:04:22,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:04:22,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724476472] [2021-05-02 17:04:22,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724476472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:04:22,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:04:22,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:04:22,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580418741] [2021-05-02 17:04:22,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:04:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:04:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:04:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:04:22,773 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:04:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:04:22,844 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 17:04:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:04:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 17:04:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:04:22,845 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:04:22,845 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:04:22,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:04:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:04:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:04:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:04:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 17:04:22,851 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 17:04:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:04:22,851 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 17:04:22,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:04:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 17:04:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:04:22,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:04:22,852 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:04:23,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:04:23,056 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:04:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:04:23,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-02 17:04:23,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:04:23,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263783770] [2021-05-02 17:04:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:04:23,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:04:23,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70301829] [2021-05-02 17:04:23,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:04:23,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:04:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:04:23,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:04:23,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:04:23,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 17:04:23,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:04:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263783770] [2021-05-02 17:04:23,212 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:04:23,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70301829] [2021-05-02 17:04:23,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70301829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:04:23,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:04:23,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:04:23,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770384123] [2021-05-02 17:04:23,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:04:23,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:04:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:04:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:04:23,213 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:04:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:04:23,244 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-05-02 17:04:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:04:23,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-05-02 17:04:23,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:04:23,246 INFO L225 Difference]: With dead ends: 48 [2021-05-02 17:04:23,246 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 17:04:23,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:04:23,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 17:04:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 17:04:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.0) internal successors, (20), 20 states have internal predecessors, (20), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:04:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-02 17:04:23,251 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 36 [2021-05-02 17:04:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:04:23,251 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-02 17:04:23,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:04:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-02 17:04:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:04:23,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:04:23,252 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:04:23,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:04:23,467 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:04:23,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:04:23,467 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-02 17:04:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:04:23,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386575714] [2021-05-02 17:04:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:04:23,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:04:23,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185831411] [2021-05-02 17:04:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:04:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:04:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:04:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:04:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:04:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:04:23,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:04:23,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386575714] [2021-05-02 17:04:23,709 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:04:23,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185831411] [2021-05-02 17:04:23,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185831411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:04:23,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:04:23,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:04:23,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210230243] [2021-05-02 17:04:23,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:04:23,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:04:23,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:04:23,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:04:23,711 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 17:04:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:04:23,766 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-05-02 17:04:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:04:23,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-02 17:04:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:04:23,766 INFO L225 Difference]: With dead ends: 35 [2021-05-02 17:04:23,766 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:04:23,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:04:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:04:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:04:23,767 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 17:04:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:04:23,767 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2021-05-02 17:04:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:04:23,767 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:04:23,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 17:04:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:04:23,768 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:04:23,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:04:23,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:04:24,398 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:04:24,399 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 17:04:24,399 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 17:04:24,399 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 17:04:24,399 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 42) the Hoare annotation is: true [2021-05-02 17:04:24,400 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1))) (or (and (<= 1 main_~c~0) .cse0 (= main_~x~0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (= main_~y~0 1) (< 0 main_~k~0)) (and .cse0 (<= 0 main_~k~0) (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)))) [2021-05-02 17:04:24,400 INFO L198 CegarLoopUtils]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2021-05-02 17:04:24,400 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1))) (or (and (<= 1 main_~c~0) .cse0 (= main_~x~0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (= main_~y~0 1) (< 0 main_~k~0)) (and .cse0 (<= 0 main_~k~0) (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)))) [2021-05-02 17:04:24,400 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 37) the Hoare annotation is: (or (and (<= 1 main_~c~0) (<= main_~k~0 1) (= main_~x~0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (= main_~y~0 1) (< 0 main_~k~0)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 17:04:24,400 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2021-05-02 17:04:24,400 INFO L198 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-05-02 17:04:24,400 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-02 17:04:24,400 INFO L194 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (<= main_~k~0 1) (<= 0 main_~k~0)) [2021-05-02 17:04:24,400 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 42) no Hoare annotation was computed. [2021-05-02 17:04:24,400 INFO L198 CegarLoopUtils]: For program point L40(line 40) no Hoare annotation was computed. [2021-05-02 17:04:24,400 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (or (and (<= 1 main_~c~0) (<= main_~k~0 1) (= main_~y~0 1) (< 0 main_~k~0)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 17:04:24,400 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 17:04:24,401 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 17:04:24,401 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 17:04:24,401 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 17:04:24,401 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 17:04:24,401 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 17:04:24,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:04:24 BoogieIcfgContainer [2021-05-02 17:04:24,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:04:24,411 INFO L168 Benchmark]: Toolchain (without parser) took 3462.83 ms. Allocated memory was 177.2 MB in the beginning and 232.8 MB in the end (delta: 55.6 MB). Free memory was 141.3 MB in the beginning and 104.1 MB in the end (delta: 37.2 MB). Peak memory consumption was 93.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:04:24,411 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 177.2 MB. Free memory is still 157.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:04:24,411 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.87 ms. Allocated memory is still 177.2 MB. Free memory was 141.1 MB in the beginning and 160.5 MB in the end (delta: -19.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:04:24,411 INFO L168 Benchmark]: Boogie Preprocessor took 30.21 ms. Allocated memory is still 177.2 MB. Free memory was 160.5 MB in the beginning and 159.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:04:24,411 INFO L168 Benchmark]: RCFGBuilder took 286.73 ms. Allocated memory is still 177.2 MB. Free memory was 159.3 MB in the beginning and 144.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:04:24,411 INFO L168 Benchmark]: TraceAbstraction took 2982.06 ms. Allocated memory was 177.2 MB in the beginning and 232.8 MB in the end (delta: 55.6 MB). Free memory was 143.7 MB in the beginning and 104.1 MB in the end (delta: 39.6 MB). Peak memory consumption was 95.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:04:24,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 177.2 MB. Free memory is still 157.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 159.87 ms. Allocated memory is still 177.2 MB. Free memory was 141.1 MB in the beginning and 160.5 MB in the end (delta: -19.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.21 ms. Allocated memory is still 177.2 MB. Free memory was 160.5 MB in the beginning and 159.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 286.73 ms. Allocated memory is still 177.2 MB. Free memory was 159.3 MB in the beginning and 144.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2982.06 ms. Allocated memory was 177.2 MB in the beginning and 232.8 MB in the end (delta: 55.6 MB). Free memory was 143.7 MB in the beginning and 104.1 MB in the end (delta: 39.6 MB). Peak memory consumption was 95.7 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2494.4ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 9.8ms, AutomataDifference: 339.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 412.5ms, InitialAbstractionConstructionTime: 23.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 118 SDtfs, 47 SDslu, 387 SDs, 0 SdLazy, 225 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 176.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 226.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=3, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.7ms AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 25 PreInvPairs, 34 NumberOfFragments, 167 HoareAnnotationTreeSize, 25 FomulaSimplifications, 116 FormulaSimplificationTreeSizeReduction, 134.8ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 449 FormulaSimplificationTreeSizeReductionInter, 270.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 72.2ms SsaConstructionTime, 156.1ms SatisfiabilityAnalysisTime, 667.6ms InterpolantComputationTime, 149 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 427 SizeOfPredicates, 10 NumberOfNonLiveVariables, 531 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 43/60 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: 28]: Loop Invariant Derived loop invariant: ((((1 <= c && k <= 1) && x == y * y * y * y) && y == 1) && 0 < k) || ((((k <= 1 && 0 <= k) && y == 0) && 0 <= c) && x == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...