/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/sqrt1-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:22:40,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:22:40,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:22:40,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:22:40,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:22:40,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:22:40,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:22:40,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:22:40,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:22:40,633 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:22:40,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:22:40,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:22:40,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:22:40,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:22:40,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:22:40,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:22:40,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:22:40,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:22:40,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:22:40,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:22:40,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 17:22:40,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:22:40,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:22:40,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:22:40,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:22:40,686 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:22:40,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:22:40,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:22:40,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:22:40,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:22:40,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:22:40,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:22:40,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:22:40,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:22:40,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:22:40,689 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:22:40,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:22:40,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:22:40,914 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:22:40,915 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:22:40,915 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:22:40,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2021-05-02 17:22:40,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fb5a557/b151ceaa39dc48a4ba97fdf7bf30d983/FLAG5864d963b [2021-05-02 17:22:41,342 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:22:41,343 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2021-05-02 17:22:41,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fb5a557/b151ceaa39dc48a4ba97fdf7bf30d983/FLAG5864d963b [2021-05-02 17:22:41,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fb5a557/b151ceaa39dc48a4ba97fdf7bf30d983 [2021-05-02 17:22:41,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:22:41,777 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:22:41,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:22:41,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:22:41,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:22:41,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:41,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d3aee35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41, skipping insertion in model container [2021-05-02 17:22:41,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:41,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:22:41,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:22:41,903 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/sqrt1-ll_unwindbound1.c[520,533] [2021-05-02 17:22:41,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:22:41,926 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:22:41,966 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/sqrt1-ll_unwindbound1.c[520,533] [2021-05-02 17:22:41,971 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:22:41,984 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:22:41,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41 WrapperNode [2021-05-02 17:22:41,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:22:41,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:22:41,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:22:41,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:22:41,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:41,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:42,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:42,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:42,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:42,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:42,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... [2021-05-02 17:22:42,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:22:42,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:22:42,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:22:42,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:22:42,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:22:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:22:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:22:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:22:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:22:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:22:42,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:22:42,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:22:42,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:22:42,084 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:22:42,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:22:42,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:22:42,085 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:22:42,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:22:42,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:22:42,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:22:42,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:22:42,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:22:42,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:22:42,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:22:42,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:22:42,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:22:42,321 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:22:42,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:22:42 BoogieIcfgContainer [2021-05-02 17:22:42,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:22:42,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:22:42,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:22:42,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:22:42,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:22:41" (1/3) ... [2021-05-02 17:22:42,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cd3978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:22:42, skipping insertion in model container [2021-05-02 17:22:42,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:22:41" (2/3) ... [2021-05-02 17:22:42,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66cd3978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:22:42, skipping insertion in model container [2021-05-02 17:22:42,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:22:42" (3/3) ... [2021-05-02 17:22:42,327 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound1.c [2021-05-02 17:22:42,339 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:22:42,342 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:22:42,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:22:42,382 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:22:42,382 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:22:42,382 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:22:42,382 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:22:42,382 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:22:42,382 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:22:42,382 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:22:42,382 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:22:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:22:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:22:42,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:22:42,396 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:22:42,397 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:22:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:22:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-02 17:22:42,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:22:42,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924286271] [2021-05-02 17:22:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:22:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:42,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:22:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:22:42,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:22:42,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924286271] [2021-05-02 17:22:42,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924286271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:22:42,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:22:42,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:22:42,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714041283] [2021-05-02 17:22:42,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:22:42,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:22:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:22:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:22:42,573 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:22:42,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:22:42,672 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-02 17:22:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:22:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:22:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:22:42,681 INFO L225 Difference]: With dead ends: 47 [2021-05-02 17:22:42,681 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:22:42,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:22:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:22:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 17:22:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:22:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 17:22:42,717 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 17:22:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:22:42,719 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 17:22:42,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:22:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 17:22:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:22:42,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:22:42,722 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:22:42,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:22:42,723 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:22:42,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:22:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-02 17:22:42,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:22:42,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941241173] [2021-05-02 17:22:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:22:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:42,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:22:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:22:42,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:22:42,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941241173] [2021-05-02 17:22:42,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941241173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:22:42,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:22:42,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:22:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23043516] [2021-05-02 17:22:42,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:22:42,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:22:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:22:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:22:42,860 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:22:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:22:42,979 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-02 17:22:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:22:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 17:22:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:22:42,980 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:22:42,980 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 17:22:42,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:22:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 17:22:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 17:22:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:22:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 17:22:42,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 17:22:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:22:42,986 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 17:22:42,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:22:42,987 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 17:22:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 17:22:42,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:22:42,987 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:22:42,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:22:42,987 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:22:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:22:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-02 17:22:42,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:22:42,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769159938] [2021-05-02 17:22:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:22:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:43,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:22:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:22:43,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:22:43,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769159938] [2021-05-02 17:22:43,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769159938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:22:43,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:22:43,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:22:43,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502036749] [2021-05-02 17:22:43,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:22:43,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:22:43,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:22:43,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:22:43,087 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:22:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:22:43,344 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-02 17:22:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:22:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 17:22:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:22:43,347 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:22:43,347 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 17:22:43,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:22:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 17:22:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 17:22:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:22:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 17:22:43,367 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 17:22:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:22:43,367 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 17:22:43,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:22:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 17:22:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:22:43,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:22:43,368 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:22:43,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 17:22:43,368 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:22:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:22:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2021-05-02 17:22:43,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:22:43,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073696447] [2021-05-02 17:22:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:22:43,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:22:43,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312716096] [2021-05-02 17:22:43,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:22:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:22:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:22:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:22:43,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:22:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073696447] [2021-05-02 17:22:43,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:22:43,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312716096] [2021-05-02 17:22:43,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312716096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:22:43,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:22:43,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:22:43,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962919129] [2021-05-02 17:22:43,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:22:43,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:22:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:22:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:22:43,590 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:22:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:22:43,689 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 17:22:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:22:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 17:22:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:22:43,690 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:22:43,690 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 17:22:43,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:22:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 17:22:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 17:22:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:22:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 17:22:43,704 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2021-05-02 17:22:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:22:43,704 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 17:22:43,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:22:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 17:22:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 17:22:43,705 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:22:43,705 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:22:43,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:22:43,908 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:22:43,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:22:43,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2021-05-02 17:22:43,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:22:43,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082658915] [2021-05-02 17:22:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:22:43,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:22:43,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320562025] [2021-05-02 17:22:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:22:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:22:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:22:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:22:44,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:22:44,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082658915] [2021-05-02 17:22:44,101 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:22:44,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320562025] [2021-05-02 17:22:44,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320562025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:22:44,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:22:44,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 17:22:44,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071815542] [2021-05-02 17:22:44,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:22:44,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:22:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:22:44,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:22:44,103 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:22:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:22:44,166 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 17:22:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:22:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-02 17:22:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:22:44,169 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:22:44,169 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:22:44,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:22:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:22:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:22:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 17:22:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-05-02 17:22:44,181 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 30 [2021-05-02 17:22:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:22:44,181 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-05-02 17:22:44,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:22:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-05-02 17:22:44,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 17:22:44,182 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:22:44,182 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:22:44,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:22:44,383 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:22:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:22:44,387 INFO L82 PathProgramCache]: Analyzing trace with hash -775311695, now seen corresponding path program 1 times [2021-05-02 17:22:44,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:22:44,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384577894] [2021-05-02 17:22:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:22:44,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:22:44,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507368072] [2021-05-02 17:22:44,395 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 17:22:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:22:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:22:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:22:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:22:44,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:22:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384577894] [2021-05-02 17:22:44,566 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:22:44,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507368072] [2021-05-02 17:22:44,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507368072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:22:44,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:22:44,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:22:44,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885696796] [2021-05-02 17:22:44,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:22:44,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:22:44,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:22:44,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:22:44,567 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:22:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:22:44,702 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-05-02 17:22:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:22:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 17:22:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:22:44,703 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:22:44,703 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:22:44,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:22:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:22:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 17:22:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 17:22:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 17:22:44,709 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-05-02 17:22:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:22:44,709 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 17:22:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:22:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 17:22:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 17:22:44,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:22:44,711 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:22:44,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:22:44,925 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:22:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:22:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1332643880, now seen corresponding path program 2 times [2021-05-02 17:22:44,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:22:44,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280535927] [2021-05-02 17:22:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:22:44,933 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:22:44,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126857795] [2021-05-02 17:22:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:22:44,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:22:44,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:22:44,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:22:44,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:22:45,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:22:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 17:22:45,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:22:45,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280535927] [2021-05-02 17:22:45,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:22:45,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126857795] [2021-05-02 17:22:45,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126857795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:22:45,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:22:45,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 17:22:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888392872] [2021-05-02 17:22:45,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:22:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:22:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:22:45,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:22:45,093 INFO L87 Difference]: Start difference. First operand 49 states and 57 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, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:22:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:22:45,121 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-05-02 17:22:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:22:45,121 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, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-02 17:22:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:22:45,121 INFO L225 Difference]: With dead ends: 49 [2021-05-02 17:22:45,121 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:22:45,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:22:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:22:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:22:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 17:22:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:22:45,122 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2021-05-02 17:22:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:22:45,122 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:22:45,122 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, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:22:45,122 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:22:45,123 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:22:45,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:22:45,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:22:45,570 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 17:22:45,570 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 17:22:45,570 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 17:22:45,570 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:22:45,571 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 17:22:45,571 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:22:45,571 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:22:45,571 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2021-05-02 17:22:45,571 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:22:45,571 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:22:45,571 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:22:45,571 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 17:22:45,571 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:22:45,571 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:22:45,571 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:22:45,572 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (or (and (<= 1 ~counter~0) (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:22:45,572 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (or (and (<= 1 ~counter~0) (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:22:45,572 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2021-05-02 17:22:45,572 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 17:22:45,572 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2021-05-02 17:22:45,572 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1))) [2021-05-02 17:22:45,572 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (and (<= 1 ~counter~0) (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:22:45,572 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-02 17:22:45,572 INFO L198 CegarLoopUtils]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:22:45,572 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= ~counter~0 |old(~counter~0)|) (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and (<= 1 ~counter~0) (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1)) (not (= |old(~counter~0)| 0))) [2021-05-02 17:22:45,572 INFO L194 CegarLoopUtils]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (not (= |old(~counter~0)| 0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1)) (and (= main_~t~0 1) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1))) [2021-05-02 17:22:45,573 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1))) [2021-05-02 17:22:45,573 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 17:22:45,573 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 17:22:45,573 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 17:22:45,573 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:22:45,573 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:22:45,573 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 17:22:45,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:22:45 BoogieIcfgContainer [2021-05-02 17:22:45,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:22:45,584 INFO L168 Benchmark]: Toolchain (without parser) took 3807.12 ms. Allocated memory was 205.5 MB in the beginning and 252.7 MB in the end (delta: 47.2 MB). Free memory was 169.2 MB in the beginning and 96.4 MB in the end (delta: 72.8 MB). Peak memory consumption was 121.3 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:45,584 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 205.5 MB. Free memory is still 185.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:22:45,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.33 ms. Allocated memory is still 205.5 MB. Free memory was 169.0 MB in the beginning and 187.2 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:45,584 INFO L168 Benchmark]: Boogie Preprocessor took 32.39 ms. Allocated memory is still 205.5 MB. Free memory was 187.2 MB in the beginning and 185.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:45,584 INFO L168 Benchmark]: RCFGBuilder took 301.85 ms. Allocated memory is still 205.5 MB. Free memory was 185.4 MB in the beginning and 170.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:45,584 INFO L168 Benchmark]: TraceAbstraction took 3260.82 ms. Allocated memory was 205.5 MB in the beginning and 252.7 MB in the end (delta: 47.2 MB). Free memory was 169.7 MB in the beginning and 96.4 MB in the end (delta: 73.3 MB). Peak memory consumption was 121.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:45,585 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 205.5 MB. Free memory is still 185.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 207.33 ms. Allocated memory is still 205.5 MB. Free memory was 169.0 MB in the beginning and 187.2 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.39 ms. Allocated memory is still 205.5 MB. Free memory was 187.2 MB in the beginning and 185.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 301.85 ms. Allocated memory is still 205.5 MB. Free memory was 185.4 MB in the beginning and 170.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3260.82 ms. Allocated memory was 205.5 MB in the beginning and 252.7 MB in the end (delta: 47.2 MB). Free memory was 169.7 MB in the beginning and 96.4 MB in the end (delta: 73.3 MB). Peak memory consumption was 121.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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: 2953.2ms, OverallIterations: 7, TraceHistogramMax: 7, EmptinessCheckTime: 10.1ms, AutomataDifference: 837.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 236.7ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 171 SDtfs, 71 SDslu, 400 SDs, 0 SdLazy, 414 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 392.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 417.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 77.9ms AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 38 PreInvPairs, 49 NumberOfFragments, 235 HoareAnnotationTreeSize, 38 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 47.6ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 345 FormulaSimplificationTreeSizeReductionInter, 180.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 37.3ms SsaConstructionTime, 120.3ms SatisfiabilityAnalysisTime, 796.6ms InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 158 ConstructedInterpolants, 0 QuantifiedInterpolants, 569 SizeOfPredicates, 9 NumberOfNonLiveVariables, 594 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 131/138 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: 30]: Loop Invariant Derived loop invariant: ((((counter == \old(counter) && a == 0) && a * 2 + 1 == t) && s == 1) || (((1 <= counter && t == 3) && s == t + 1) && a == 1)) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...