/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/bresenham-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:53:54,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:53:54,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:53:54,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:53:54,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:53:54,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:53:54,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:53:54,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:53:54,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:53:54,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:53:54,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:53:54,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:53:54,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:53:54,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:53:54,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:53:54,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:53:54,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:53:54,712 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:53:54,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:53:54,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:53:54,713 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 13:53:54,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:53:54,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:53:54,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:53:54,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:53:54,729 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:53:54,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:53:54,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:53:54,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:53:54,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:53:54,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:53:54,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:53:54,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:53:54,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:53:54,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:53:54,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:53:54,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:53:54,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:53:54,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:53:54,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:53:54,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:53:54,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:53:54,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:53:54,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:53:54,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:53:54,990 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:53:54,992 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:53:54,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2021-05-02 13:53:55,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0920c75d2/c8fd54ba228a41b4b865ade01817d50a/FLAGbe7e3c7c0 [2021-05-02 13:53:55,357 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:53:55,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2021-05-02 13:53:55,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0920c75d2/c8fd54ba228a41b4b865ade01817d50a/FLAGbe7e3c7c0 [2021-05-02 13:53:55,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0920c75d2/c8fd54ba228a41b4b865ade01817d50a [2021-05-02 13:53:55,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:53:55,380 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:53:55,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:53:55,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:53:55,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:53:55,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@203133e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55, skipping insertion in model container [2021-05-02 13:53:55,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:53:55,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:53:55,515 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/bresenham-ll_valuebound100.c[597,610] [2021-05-02 13:53:55,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:53:55,575 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:53:55,583 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/bresenham-ll_valuebound100.c[597,610] [2021-05-02 13:53:55,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:53:55,609 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:53:55,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55 WrapperNode [2021-05-02 13:53:55,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:53:55,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:53:55,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:53:55,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:53:55,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (1/1) ... [2021-05-02 13:53:55,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:53:55,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:53:55,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:53:55,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:53:55,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (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 13:53:55,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:53:55,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:53:55,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:53:55,705 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:53:55,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:53:55,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:53:55,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:53:55,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:53:55,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:53:55,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:53:55,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:53:55,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:53:55,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:53:55,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:53:55,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:53:55,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:53:55,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:53:55,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:53:55,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:53:55,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:53:55,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:53:55,899 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:53:55,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:53:55 BoogieIcfgContainer [2021-05-02 13:53:55,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:53:55,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:53:55,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:53:55,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:53:55,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:53:55" (1/3) ... [2021-05-02 13:53:55,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28130604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:53:55, skipping insertion in model container [2021-05-02 13:53:55,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:55" (2/3) ... [2021-05-02 13:53:55,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28130604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:53:55, skipping insertion in model container [2021-05-02 13:53:55,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:53:55" (3/3) ... [2021-05-02 13:53:55,921 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound100.c [2021-05-02 13:53:55,924 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:53:55,926 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:53:55,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:53:55,971 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:53:55,971 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:53:55,971 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:53:55,971 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:53:55,971 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:53:55,971 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:53:55,971 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:53:55,971 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:53:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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 13:53:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:53:55,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:55,988 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 13:53:55,989 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:55,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2021-05-02 13:53:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:56,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89024281] [2021-05-02 13:53:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:56,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:53:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:56,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:53:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:56,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 13:53:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:56,211 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 13:53:56,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:56,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89024281] [2021-05-02 13:53:56,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89024281] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:53:56,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:53:56,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:53:56,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568459985] [2021-05-02 13:53:56,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:53:56,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:53:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:53:56,226 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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 13:53:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:56,292 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2021-05-02 13:53:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:53:56,294 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 13:53:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:56,299 INFO L225 Difference]: With dead ends: 57 [2021-05-02 13:53:56,299 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 13:53:56,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:53:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 13:53:56,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 13:53:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 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 13:53:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 13:53:56,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-02 13:53:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:56,354 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 13:53:56,354 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 13:53:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 13:53:56,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:53:56,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:56,356 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 13:53:56,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:53:56,357 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2021-05-02 13:53:56,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:56,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129644602] [2021-05-02 13:53:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:56,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:56,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659124347] [2021-05-02 13:53:56,387 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 13:53:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:56,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:53:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:56,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:56,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:56,585 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 13:53:56,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:56,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129644602] [2021-05-02 13:53:56,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:56,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659124347] [2021-05-02 13:53:56,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659124347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:56,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:56,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:53:56,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899862543] [2021-05-02 13:53:56,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:53:56,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:56,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:53:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:53:56,587 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 13:53:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:56,699 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-05-02 13:53:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:53:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 13:53:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:56,701 INFO L225 Difference]: With dead ends: 43 [2021-05-02 13:53:56,701 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:53:56,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:53:56,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:53:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 13:53:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:53:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 13:53:56,714 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-02 13:53:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:56,718 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 13:53:56,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 13:53:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 13:53:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:53:56,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:56,725 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:56,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:53:56,939 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:56,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:56,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2021-05-02 13:53:56,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:56,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131901866] [2021-05-02 13:53:56,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:56,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:56,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775943824] [2021-05-02 13:53:56,948 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 13:53:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:53:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:53:57,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:57,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131901866] [2021-05-02 13:53:57,213 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:57,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775943824] [2021-05-02 13:53:57,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775943824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:57,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:57,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:53:57,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549354293] [2021-05-02 13:53:57,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:53:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:53:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:53:57,215 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:57,350 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-05-02 13:53:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:53:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 13:53:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:57,351 INFO L225 Difference]: With dead ends: 48 [2021-05-02 13:53:57,351 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 13:53:57,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:53:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 13:53:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 13:53:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:53:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 13:53:57,357 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-02 13:53:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:57,357 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 13:53:57,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 13:53:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:53:57,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:57,358 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:57,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:57,575 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2021-05-02 13:53:57,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:57,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532342767] [2021-05-02 13:53:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:57,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:57,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409107893] [2021-05-02 13:53:57,587 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 13:53:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:57,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:53:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:57,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:53:57,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:57,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532342767] [2021-05-02 13:53:57,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:57,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409107893] [2021-05-02 13:53:57,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409107893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:57,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:57,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:53:57,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762097006] [2021-05-02 13:53:57,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:53:57,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:57,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:53:57,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:53:57,811 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:57,950 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-02 13:53:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:53:57,951 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 13:53:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:57,952 INFO L225 Difference]: With dead ends: 56 [2021-05-02 13:53:57,952 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 13:53:57,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:53:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 13:53:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 13:53:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:53:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-02 13:53:57,958 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-05-02 13:53:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:57,958 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-02 13:53:57,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:53:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-02 13:53:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:53:57,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:57,959 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2021-05-02 13:53:58,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:58,169 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:58,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:58,169 INFO L82 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2021-05-02 13:53:58,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:58,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087786021] [2021-05-02 13:53:58,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:58,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:58,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891444057] [2021-05-02 13:53:58,178 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 13:53:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:58,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:53:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:53:58,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:58,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087786021] [2021-05-02 13:53:58,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:58,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891444057] [2021-05-02 13:53:58,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891444057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:58,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:58,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 13:53:58,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477016633] [2021-05-02 13:53:58,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:53:58,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:53:58,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:53:58,464 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:53:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:58,699 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-02 13:53:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 13:53:58,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 13:53:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:58,702 INFO L225 Difference]: With dead ends: 61 [2021-05-02 13:53:58,702 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 13:53:58,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:53:58,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 13:53:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-05-02 13:53:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:53:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 13:53:58,720 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2021-05-02 13:53:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:58,722 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 13:53:58,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:53:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 13:53:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 13:53:58,722 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:58,722 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 13:53:58,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:58,933 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:58,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 2 times [2021-05-02 13:53:58,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:58,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932712324] [2021-05-02 13:53:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:58,940 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:58,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067188883] [2021-05-02 13:53:58,940 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 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 13:53:58,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:53:58,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:53:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 13:53:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:59,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:53:59,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:59,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932712324] [2021-05-02 13:53:59,532 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:59,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067188883] [2021-05-02 13:53:59,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067188883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:59,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:59,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 13:53:59,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963404195] [2021-05-02 13:53:59,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:53:59,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:59,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:53:59,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:53:59,533 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:54:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:54:00,953 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-05-02 13:54:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:54:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 13:54:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:54:00,954 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:54:00,954 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:54:00,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 503.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:54:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:54:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:54:00,955 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 13:54:00,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:54:00,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-02 13:54:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:54:00,955 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:54:00,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:54:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:54:00,955 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:54:01,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 13:54:01,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:54:01,378 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:54:01,379 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 10 12) the Hoare annotation is: true [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:54:01,379 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~X~0 100) (<= 0 main_~X~0)) [2021-05-02 13:54:01,379 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L201 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 53) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (and (<= main_~X~0 100) (<= 0 main_~X~0)) [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L50-1(line 50) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 53) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L40(lines 40 45) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L40-2(lines 40 45) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 47) the Hoare annotation is: (and (<= main_~X~0 100) (<= 0 main_~X~0)) [2021-05-02 13:54:01,380 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 53) the Hoare annotation is: true [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L32-3(lines 32 47) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~X~0 100) (<= 0 main_~X~0)) [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L35-1(lines 32 47) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:54:01,380 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-02 13:54:01,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:54:01 BoogieIcfgContainer [2021-05-02 13:54:01,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:54:01,389 INFO L168 Benchmark]: Toolchain (without parser) took 6009.58 ms. Allocated memory was 231.7 MB in the beginning and 331.4 MB in the end (delta: 99.6 MB). Free memory was 195.0 MB in the beginning and 297.0 MB in the end (delta: -102.0 MB). Peak memory consumption was 176.9 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:01,389 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 231.7 MB. Free memory is still 211.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:54:01,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.73 ms. Allocated memory is still 231.7 MB. Free memory was 194.9 MB in the beginning and 212.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:01,389 INFO L168 Benchmark]: Boogie Preprocessor took 30.84 ms. Allocated memory is still 231.7 MB. Free memory was 212.7 MB in the beginning and 211.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:01,389 INFO L168 Benchmark]: RCFGBuilder took 258.60 ms. Allocated memory is still 231.7 MB. Free memory was 211.2 MB in the beginning and 196.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:01,389 INFO L168 Benchmark]: TraceAbstraction took 5487.40 ms. Allocated memory was 231.7 MB in the beginning and 331.4 MB in the end (delta: 99.6 MB). Free memory was 195.9 MB in the beginning and 297.0 MB in the end (delta: -101.1 MB). Peak memory consumption was 176.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:54:01,390 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 231.7 MB. Free memory is still 211.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 226.73 ms. Allocated memory is still 231.7 MB. Free memory was 194.9 MB in the beginning and 212.7 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.84 ms. Allocated memory is still 231.7 MB. Free memory was 212.7 MB in the beginning and 211.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 258.60 ms. Allocated memory is still 231.7 MB. Free memory was 211.2 MB in the beginning and 196.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5487.40 ms. Allocated memory was 231.7 MB in the beginning and 331.4 MB in the end (delta: 99.6 MB). Free memory was 195.9 MB in the beginning and 297.0 MB in the end (delta: -101.1 MB). Peak memory consumption was 176.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5195.6ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 15.1ms, AutomataDifference: 2138.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 213.2ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 146 SDslu, 678 SDs, 0 SdLazy, 1062 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1588.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1073.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 82.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 24 PreInvPairs, 39 NumberOfFragments, 65 HoareAnnotationTreeSize, 24 FomulaSimplifications, 872 FormulaSimplificationTreeSizeReduction, 76.0ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 703 FormulaSimplificationTreeSizeReductionInter, 130.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 55.1ms SsaConstructionTime, 140.8ms SatisfiabilityAnalysisTime, 1432.2ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1206 SizeOfPredicates, 27 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 27/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: X <= 100 && 0 <= X RESULT: Ultimate proved your program to be correct! Received shutdown request...