/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/geo1-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:20:08,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:20:08,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:20:08,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:20:08,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:20:08,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:20:08,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:20:08,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:20:08,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:20:08,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:20:08,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:20:08,830 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:20:08,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:20:08,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:20:08,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:20:08,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:20:08,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:20:08,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:20:08,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:20:08,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:20:08,849 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 15:20:08,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:20:08,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:20:08,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:20:08,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:20:08,891 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:20:08,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:20:08,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:20:08,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:20:08,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:20:08,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:20:08,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:20:08,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:20:08,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:20:08,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:20:08,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:20:08,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:20:08,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:20:08,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:20:08,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:20:08,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:20:08,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:20:09,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:20:09,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:20:09,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:20:09,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:20:09,196 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:20:09,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound2.c [2021-05-02 15:20:09,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210ecad1f/d93af9cebcee472b850085910dc95977/FLAG9ca3256ea [2021-05-02 15:20:09,609 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:20:09,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound2.c [2021-05-02 15:20:09,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210ecad1f/d93af9cebcee472b850085910dc95977/FLAG9ca3256ea [2021-05-02 15:20:09,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/210ecad1f/d93af9cebcee472b850085910dc95977 [2021-05-02 15:20:09,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:20:09,633 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:20:09,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:20:09,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:20:09,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:20:09,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2024e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09, skipping insertion in model container [2021-05-02 15:20:09,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:20:09,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:20:09,767 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/geo1-ll_unwindbound2.c[546,559] [2021-05-02 15:20:09,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:20:09,787 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:20:09,833 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/geo1-ll_unwindbound2.c[546,559] [2021-05-02 15:20:09,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:20:09,853 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:20:09,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09 WrapperNode [2021-05-02 15:20:09,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:20:09,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:20:09,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:20:09,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:20:09,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (1/1) ... [2021-05-02 15:20:09,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:20:09,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:20:09,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:20:09,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:20:09,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (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 15:20:09,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:20:09,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:20:09,948 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:20:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:20:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:20:09,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:20:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:20:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:20:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:20:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:20:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:20:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:20:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:20:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:20:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:20:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:20:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:20:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:20:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:20:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:20:10,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:20:10,111 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:20:10,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:20:10 BoogieIcfgContainer [2021-05-02 15:20:10,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:20:10,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:20:10,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:20:10,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:20:10,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:20:09" (1/3) ... [2021-05-02 15:20:10,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e1ebe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:20:10, skipping insertion in model container [2021-05-02 15:20:10,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:20:09" (2/3) ... [2021-05-02 15:20:10,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e1ebe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:20:10, skipping insertion in model container [2021-05-02 15:20:10,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:20:10" (3/3) ... [2021-05-02 15:20:10,135 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound2.c [2021-05-02 15:20:10,139 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:20:10,141 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:20:10,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:20:10,192 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:20:10,192 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:20:10,192 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:20:10,192 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:20:10,193 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:20:10,193 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:20:10,193 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:20:10,193 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:20:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 15:20:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:20:10,210 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:10,211 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] [2021-05-02 15:20:10,212 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 730417173, now seen corresponding path program 1 times [2021-05-02 15:20:10,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:10,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532504321] [2021-05-02 15:20:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:10,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:20:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:10,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:20:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:10,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 15:20:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:10,396 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 15:20:10,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:10,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532504321] [2021-05-02 15:20:10,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532504321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:20:10,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:20:10,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:20:10,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276458111] [2021-05-02 15:20:10,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:20:10,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:10,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:20:10,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:20:10,411 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 15:20:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:10,476 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2021-05-02 15:20:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:20:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 23 [2021-05-02 15:20:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:10,483 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:20:10,483 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 15:20:10,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:20:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 15:20:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 15:20:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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 15:20:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 15:20:10,519 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-02 15:20:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:10,519 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 15:20:10,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 15:20:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 15:20:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:20:10,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:10,521 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] [2021-05-02 15:20:10,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:20:10,521 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash -942473515, now seen corresponding path program 1 times [2021-05-02 15:20:10,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:10,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061071790] [2021-05-02 15:20:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:10,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:10,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837966404] [2021-05-02 15:20:10,541 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 15:20:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:10,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:20:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:10,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:10,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:10,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:10,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:10,765 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 15:20:10,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:10,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061071790] [2021-05-02 15:20:10,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:10,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837966404] [2021-05-02 15:20:10,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837966404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:10,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:10,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:20:10,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559465524] [2021-05-02 15:20:10,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:20:10,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:20:10,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:20:10,771 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 15:20:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:10,844 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 15:20:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:20:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 23 [2021-05-02 15:20:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:10,846 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:20:10,846 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:20:10,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:20:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:20:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 15:20:10,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 15:20:10,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 15:20:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:10,862 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 15:20:10,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 15:20:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 15:20:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 15:20:10,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:10,868 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 15:20:11,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:20:11,085 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash 769172850, now seen corresponding path program 1 times [2021-05-02 15:20:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691476046] [2021-05-02 15:20:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:11,096 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:11,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526859153] [2021-05-02 15:20:11,097 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 15:20:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:20:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:11,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,211 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 15:20:11,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691476046] [2021-05-02 15:20:11,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526859153] [2021-05-02 15:20:11,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526859153] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:20:11,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:20:11,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:20:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167022009] [2021-05-02 15:20:11,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:20:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:11,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:20:11,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:20:11,213 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:11,223 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-05-02 15:20:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:20:11,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 15:20:11,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:11,225 INFO L225 Difference]: With dead ends: 40 [2021-05-02 15:20:11,225 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:20:11,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:20:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:20:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:20:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 15:20:11,230 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2021-05-02 15:20:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:11,230 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 15:20:11,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:20:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 15:20:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 15:20:11,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:11,231 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:11,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:11,445 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 431121724, now seen corresponding path program 1 times [2021-05-02 15:20:11,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:11,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197814031] [2021-05-02 15:20:11,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:11,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:11,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223429368] [2021-05-02 15:20:11,454 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 15:20:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:11,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:20:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:11,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:20:11,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197814031] [2021-05-02 15:20:11,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223429368] [2021-05-02 15:20:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223429368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:11,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:11,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:20:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272407810] [2021-05-02 15:20:11,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:20:11,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:11,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:20:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:20:11,676 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:13,824 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-05-02 15:20:13,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:20:13,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 15:20:13,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:13,825 INFO L225 Difference]: With dead ends: 40 [2021-05-02 15:20:13,825 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:20:13,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:20:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:20:13,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:20:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:20:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 15:20:13,829 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2021-05-02 15:20:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:13,830 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 15:20:13,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 15:20:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 15:20:13,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:13,830 INFO L523 BasicCegarLoop]: trace histogram [2, 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 15:20:14,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:14,046 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1792638864, now seen corresponding path program 1 times [2021-05-02 15:20:14,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:14,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227425376] [2021-05-02 15:20:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:14,054 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:14,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349407229] [2021-05-02 15:20:14,054 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 15:20:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:20:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:20:14,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227425376] [2021-05-02 15:20:14,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349407229] [2021-05-02 15:20:14,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349407229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:14,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:14,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:20:14,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613594901] [2021-05-02 15:20:14,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:20:14,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:14,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:20:14,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:20:14,266 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:14,384 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 15:20:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:20:14,385 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 15:20:14,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:14,387 INFO L225 Difference]: With dead ends: 44 [2021-05-02 15:20:14,387 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 15:20:14,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:20:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 15:20:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 15:20:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:20:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 15:20:14,400 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 31 [2021-05-02 15:20:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:14,401 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 15:20:14,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:20:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 15:20:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:20:14,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:14,403 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:14,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:14,617 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash -341689321, now seen corresponding path program 1 times [2021-05-02 15:20:14,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:14,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331216252] [2021-05-02 15:20:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:14,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:14,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296939454] [2021-05-02 15:20:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:20:14,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:20:14,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:14,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:20:14,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:14,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331216252] [2021-05-02 15:20:14,768 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:14,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296939454] [2021-05-02 15:20:14,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296939454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:14,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:14,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:20:14,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459878341] [2021-05-02 15:20:14,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:20:14,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:14,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:20:14,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:20:14,770 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:20:14,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:14,819 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 15:20:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:20:14,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:20:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:14,820 INFO L225 Difference]: With dead ends: 48 [2021-05-02 15:20:14,820 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 15:20:14,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:20:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 15:20:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 15:20:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 28 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:20:14,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 15:20:14,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2021-05-02 15:20:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:14,825 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 15:20:14,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:20:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 15:20:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:20:14,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:14,825 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:15,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:20:15,045 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash 761075019, now seen corresponding path program 2 times [2021-05-02 15:20:15,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:15,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423924170] [2021-05-02 15:20:15,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:15,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:15,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649832595] [2021-05-02 15:20:15,053 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:15,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:20:15,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:20:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:20:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:15,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:20:15,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:15,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423924170] [2021-05-02 15:20:15,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:15,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649832595] [2021-05-02 15:20:15,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649832595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:15,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:15,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:20:15,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704549656] [2021-05-02 15:20:15,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:20:15,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:15,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:20:15,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:20:15,194 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:20:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:15,231 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-05-02 15:20:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:20:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 15:20:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:15,232 INFO L225 Difference]: With dead ends: 51 [2021-05-02 15:20:15,232 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 15:20:15,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:20:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 15:20:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 15:20:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.0) internal successors, (25), 25 states have internal predecessors, (25), 7 states have call successors, (7), 6 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 15:20:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 15:20:15,236 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 39 [2021-05-02 15:20:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:15,236 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 15:20:15,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 15:20:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 15:20:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 15:20:15,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:15,237 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:15,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:15,438 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:15,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2039569852, now seen corresponding path program 2 times [2021-05-02 15:20:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:15,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107030605] [2021-05-02 15:20:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:15,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:15,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356725470] [2021-05-02 15:20:15,460 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:15,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:20:15,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:20:15,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 15:20:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:15,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:21,781 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 15:20:21,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:21,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:23,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:23,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:23,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:23,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:20:23,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:23,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107030605] [2021-05-02 15:20:23,871 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:23,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356725470] [2021-05-02 15:20:23,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356725470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:23,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:23,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:20:23,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559466234] [2021-05-02 15:20:23,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:20:23,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:20:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=150, Unknown=2, NotChecked=0, Total=182 [2021-05-02 15:20:23,872 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:20:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:38,180 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-02 15:20:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:20:38,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2021-05-02 15:20:38,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:38,181 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:20:38,181 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:20:38,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 8253.4ms TimeCoverageRelationStatistics Valid=53, Invalid=287, Unknown=2, NotChecked=0, Total=342 [2021-05-02 15:20:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:20:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:20:38,182 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 15:20:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:20:38,182 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2021-05-02 15:20:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:38,182 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:20:38,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:20:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:20:38,182 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:20:38,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:38,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:20:46,601 WARN L205 SmtUtils]: Spent 8.09 s on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-05-02 15:20:51,092 WARN L205 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-02 15:20:51,094 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-02 15:20:51,094 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-02 15:20:51,094 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-02 15:20:51,094 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:20:51,094 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)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:20:51,094 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:20:51,094 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:20:51,094 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 15:20:51,094 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:20:51,094 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 45) the Hoare annotation is: (let ((.cse0 (<= 1 main_~k~0)) (.cse1 (<= 1 main_~z~0)) (.cse2 (* main_~z~0 main_~z~0))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (<= 1 main_~c~0) (<= ~counter~0 0) .cse1 (<= 0 ~counter~0) (= main_~x~0 1) (= main_~z~0 main_~y~0)) (and .cse0 (= main_~y~0 (* main_~z~0 main_~z~0 main_~z~0)) .cse1 (= main_~x~0 (+ .cse2 main_~z~0 1)) (<= 2 ~counter~0)) (not (<= 0 |old(~counter~0)|)) (and .cse0 (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~x~0 (+ main_~z~0 1)) (<= 2 main_~c~0) .cse1 (= main_~y~0 .cse2)))) [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 51) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 51) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 1 main_~k~0)) (.cse1 (<= 1 main_~z~0))) (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (and .cse0 (<= 1 main_~c~0) (<= 1 ~counter~0) (<= ~counter~0 1) .cse1 (= main_~x~0 1) (= main_~z~0 main_~y~0)) (and .cse0 (= main_~x~0 (+ main_~z~0 1)) (<= 2 main_~c~0) .cse1 (<= 2 ~counter~0) (= main_~y~0 (* main_~z~0 main_~z~0))))) [2021-05-02 15:20:51,095 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:20:51,095 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 51) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:20:51,095 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:20:51,095 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~z~0) (= ~counter~0 |old(~counter~0)|)) (not (<= 0 |old(~counter~0)|))) [2021-05-02 15:20:51,095 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (and (exists ((v_main_~x~0_11 Int) (main_~z~0 Int)) (let ((.cse0 (* v_main_~x~0_11 main_~z~0))) (and (<= 1 main_~z~0) (= .cse0 (+ v_main_~x~0_11 main_~x~0)) (= (+ .cse0 1) (+ v_main_~x~0_11 main_~y~0))))) (<= 1 main_~z~0))) [2021-05-02 15:20:51,096 INFO L198 CegarLoopUtils]: For program point L49-1(line 49) no Hoare annotation was computed. [2021-05-02 15:20:51,096 INFO L198 CegarLoopUtils]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2021-05-02 15:20:51,096 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-02 15:20:51,096 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-02 15:20:51,096 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-02 15:20:51,096 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:20:51,096 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-02 15:20:51,096 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-02 15:20:51,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:20:51 BoogieIcfgContainer [2021-05-02 15:20:51,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:20:51,106 INFO L168 Benchmark]: Toolchain (without parser) took 41473.84 ms. Allocated memory was 173.0 MB in the beginning and 207.6 MB in the end (delta: 34.6 MB). Free memory was 137.9 MB in the beginning and 107.4 MB in the end (delta: 30.5 MB). Peak memory consumption was 65.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:51,106 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 173.0 MB. Free memory is still 154.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:20:51,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.82 ms. Allocated memory is still 173.0 MB. Free memory was 137.7 MB in the beginning and 156.2 MB in the end (delta: -18.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:51,107 INFO L168 Benchmark]: Boogie Preprocessor took 31.40 ms. Allocated memory is still 173.0 MB. Free memory was 155.7 MB in the beginning and 154.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:51,107 INFO L168 Benchmark]: RCFGBuilder took 224.43 ms. Allocated memory is still 173.0 MB. Free memory was 154.6 MB in the beginning and 139.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:51,107 INFO L168 Benchmark]: TraceAbstraction took 40993.17 ms. Allocated memory was 173.0 MB in the beginning and 207.6 MB in the end (delta: 34.6 MB). Free memory was 139.4 MB in the beginning and 107.4 MB in the end (delta: 32.0 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:20:51,107 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 173.0 MB. Free memory is still 154.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.82 ms. Allocated memory is still 173.0 MB. Free memory was 137.7 MB in the beginning and 156.2 MB in the end (delta: -18.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.40 ms. Allocated memory is still 173.0 MB. Free memory was 155.7 MB in the beginning and 154.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 224.43 ms. Allocated memory is still 173.0 MB. Free memory was 154.6 MB in the beginning and 139.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 40993.17 ms. Allocated memory was 173.0 MB in the beginning and 207.6 MB in the end (delta: 34.6 MB). Free memory was 139.4 MB in the beginning and 107.4 MB in the end (delta: 32.0 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28192.3ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 17.0ms, AutomataDifference: 16849.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 12710.4ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 195 SDtfs, 108 SDslu, 624 SDs, 0 SdLazy, 392 SolverSat, 46 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 16363.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 8528.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 65.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 22 PreInvPairs, 30 NumberOfFragments, 253 HoareAnnotationTreeSize, 22 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 62.8ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 349 FormulaSimplificationTreeSizeReductionInter, 12639.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 83.5ms SsaConstructionTime, 171.7ms SatisfiabilityAnalysisTime, 9109.8ms InterpolantComputationTime, 242 NumberOfCodeBlocks, 242 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 234 ConstructedInterpolants, 2 QuantifiedInterpolants, 826 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1033 ConjunctsInSsa, 112 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 54/77 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: 35]: Loop Invariant Derived loop invariant: (((!(\old(counter) <= 0) || ((((((1 <= k && 1 <= c) && counter <= 0) && 1 <= z) && 0 <= counter) && x == 1) && z == y)) || ((((1 <= k && y == z * z * z) && 1 <= z) && x == z * z + z + 1) && 2 <= counter)) || !(0 <= \old(counter))) || ((((((1 <= k && 1 <= counter) && counter <= 1) && x == z + 1) && 2 <= c) && 1 <= z) && y == z * z) RESULT: Ultimate proved your program to be correct! Received shutdown request...