/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/prodbin-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:51:10,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:51:10,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:51:10,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:51:10,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:51:10,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:51:10,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:51:10,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:51:10,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:51:10,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:51:10,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:51:10,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:51:10,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:51:10,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:51:10,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:51:10,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:51:10,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:51:10,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:51:10,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:51:10,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:51:10,530 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 13:51:10,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:51:10,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:51:10,572 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:51:10,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:51:10,572 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:51:10,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:51:10,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:51:10,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:51:10,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:51:10,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:51:10,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:51:10,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:51:10,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:51:10,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:51:10,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:51:10,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:51:10,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:51:10,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:51:10,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:51:10,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:51:10,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:51:10,575 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:51:10,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:51:10,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:51:10,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:51:10,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:51:10,872 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:51:10,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2021-05-02 13:51:10,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611b82ce5/da95d581001a4aef98c18dbddfa4e493/FLAG90c33911a [2021-05-02 13:51:11,275 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:51:11,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2021-05-02 13:51:11,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611b82ce5/da95d581001a4aef98c18dbddfa4e493/FLAG90c33911a [2021-05-02 13:51:11,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/611b82ce5/da95d581001a4aef98c18dbddfa4e493 [2021-05-02 13:51:11,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:51:11,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:51:11,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:11,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:51:11,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:51:11,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5c261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11, skipping insertion in model container [2021-05-02 13:51:11,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:51:11,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:51:11,807 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/prodbin-ll.c[537,550] [2021-05-02 13:51:11,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:11,820 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:51:11,828 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/prodbin-ll.c[537,550] [2021-05-02 13:51:11,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:51:11,840 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:51:11,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11 WrapperNode [2021-05-02 13:51:11,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:51:11,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:51:11,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:51:11,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:51:11,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (1/1) ... [2021-05-02 13:51:11,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:51:11,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:51:11,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:51:11,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:51:11,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (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 13:51:11,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:51:11,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:51:11,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:51:11,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:51:11,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:51:11,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:51:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:51:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:51:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:51:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:51:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:51:11,987 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:51:11,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:51:11,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:51:11,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:51:11,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:51:11,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:51:11,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:51:11,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:51:11,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:51:12,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:51:12,153 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:51:12,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:12 BoogieIcfgContainer [2021-05-02 13:51:12,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:51:12,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:51:12,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:51:12,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:51:12,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:51:11" (1/3) ... [2021-05-02 13:51:12,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c829281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:12, skipping insertion in model container [2021-05-02 13:51:12,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:51:11" (2/3) ... [2021-05-02 13:51:12,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c829281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:51:12, skipping insertion in model container [2021-05-02 13:51:12,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:51:12" (3/3) ... [2021-05-02 13:51:12,159 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2021-05-02 13:51:12,164 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:51:12,166 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:51:12,206 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:51:12,221 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:51:12,221 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:51:12,221 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:51:12,221 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:51:12,221 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:51:12,221 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:51:12,221 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:51:12,221 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:51:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:51:12,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:12,250 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:12,250 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2112761405, now seen corresponding path program 1 times [2021-05-02 13:51:12,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:12,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728637611] [2021-05-02 13:51:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:51:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:51:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,480 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 13:51:12,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:12,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728637611] [2021-05-02 13:51:12,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728637611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:12,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:12,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:51:12,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975259814] [2021-05-02 13:51:12,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:51:12,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:12,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:51:12,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:12,494 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:51:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:12,558 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-05-02 13:51:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:51:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:51:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:12,566 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:51:12,566 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 13:51:12,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:51:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 13:51:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 13:51:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:51:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 13:51:12,599 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2021-05-02 13:51:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:12,599 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 13:51:12,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:51:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 13:51:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:51:12,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:12,601 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:12,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:51:12,601 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1500360061, now seen corresponding path program 1 times [2021-05-02 13:51:12,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:12,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572918355] [2021-05-02 13:51:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:12,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:12,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756456907] [2021-05-02 13:51:12,632 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 13:51:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:12,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:51:12,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:12,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:12,871 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 13:51:12,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572918355] [2021-05-02 13:51:12,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:12,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756456907] [2021-05-02 13:51:12,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756456907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:51:12,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:51:12,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:51:12,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629863903] [2021-05-02 13:51:12,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:51:12,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:12,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:51:12,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:51:12,877 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:51:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:12,988 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-05-02 13:51:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:51:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:51:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:12,990 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:51:12,990 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 13:51:12,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:51:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 13:51:12,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-05-02 13:51:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:51:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 13:51:12,996 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2021-05-02 13:51:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:12,996 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 13:51:12,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:51:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 13:51:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 13:51:12,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:12,997 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:13,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:51:13,198 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:13,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1614734214, now seen corresponding path program 1 times [2021-05-02 13:51:13,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:13,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339990661] [2021-05-02 13:51:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:13,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:13,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038336384] [2021-05-02 13:51:13,210 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 13:51:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:51:13,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:13,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:13,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339990661] [2021-05-02 13:51:13,592 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038336384] [2021-05-02 13:51:13,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038336384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:13,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:13,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:51:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341408155] [2021-05-02 13:51:13,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:51:13,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:13,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:51:13,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:51:13,594 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:13,702 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-05-02 13:51:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:51:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 13:51:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:13,703 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:51:13,703 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 13:51:13,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:51:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 13:51:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 13:51:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 13:51:13,709 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 26 [2021-05-02 13:51:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:13,709 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 13:51:13,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 13:51:13,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 13:51:13,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:13,710 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:13,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:13,918 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash -160273148, now seen corresponding path program 1 times [2021-05-02 13:51:13,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:13,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373091546] [2021-05-02 13:51:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:13,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:13,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698763836] [2021-05-02 13:51:13,931 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 13:51:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:14,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:51:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:51:14,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:14,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373091546] [2021-05-02 13:51:14,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:14,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698763836] [2021-05-02 13:51:14,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698763836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:14,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:14,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:51:14,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9241102] [2021-05-02 13:51:14,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:51:14,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:51:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:51:14,238 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:16,769 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 13:51:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:51:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 13:51:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:16,770 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:51:16,770 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:51:16,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:51:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:51:16,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-05-02 13:51:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:51:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-05-02 13:51:16,776 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 26 [2021-05-02 13:51:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:16,776 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-05-02 13:51:16,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:51:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-05-02 13:51:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:51:16,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:16,777 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:16,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:16,992 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash 730472692, now seen corresponding path program 1 times [2021-05-02 13:51:16,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:16,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019459384] [2021-05-02 13:51:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:17,000 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:17,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120891304] [2021-05-02 13:51:17,000 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 13:51:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:51:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:51:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:17,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:51:17,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019459384] [2021-05-02 13:51:17,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:17,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120891304] [2021-05-02 13:51:17,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120891304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:17,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:17,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:51:17,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346982640] [2021-05-02 13:51:17,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:51:17,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:17,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:51:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:51:17,234 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:51:19,420 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-05-02 13:51:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:51:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 13:51:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:51:19,422 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:51:19,422 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 13:51:19,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:51:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 13:51:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-05-02 13:51:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:51:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 13:51:19,427 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2021-05-02 13:51:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:51:19,428 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 13:51:19,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:51:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 13:51:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:51:19,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:51:19,428 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:51:19,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:51:19,647 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:51:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:51:19,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1040303587, now seen corresponding path program 2 times [2021-05-02 13:51:19,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:51:19,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879404393] [2021-05-02 13:51:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:51:19,655 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:51:19,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395999626] [2021-05-02 13:51:19,655 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 13:51:19,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:51:19,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:51:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 13:51:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:51:19,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:19,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:19,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:19,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:30,044 WARN L205 SmtUtils]: Spent 8.17 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 13:51:43,240 WARN L205 SmtUtils]: Spent 12.11 s on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 13:51:51,345 WARN L205 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-02 13:51:51,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:51:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:51:51,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:51:51,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879404393] [2021-05-02 13:51:51,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:51:51,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395999626] [2021-05-02 13:51:51,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395999626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:51:51,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:51:51,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 13:51:51,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370274446] [2021-05-02 13:51:51,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:51:51,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:51:51,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:51:51,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=143, Unknown=1, NotChecked=0, Total=182 [2021-05-02 13:51:51,391 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:04,556 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 13:52:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:52:04,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 13:52:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:04,557 INFO L225 Difference]: With dead ends: 49 [2021-05-02 13:52:04,557 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:52:04,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 31559.0ms TimeCoverageRelationStatistics Valid=46, Invalid=193, Unknown=1, NotChecked=0, Total=240 [2021-05-02 13:52:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:52:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:52:04,558 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 13:52:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:52:04,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2021-05-02 13:52:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:04,558 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:52:04,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:52:04,559 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:52:04,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:52:04,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:52:04,976 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 6) no Hoare annotation was computed. [2021-05-02 13:52:04,976 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 6) no Hoare annotation was computed. [2021-05-02 13:52:04,976 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 6) no Hoare annotation was computed. [2021-05-02 13:52:04,976 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:52:04,976 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 13:52:04,976 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:52:04,976 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:52:04,976 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:52:04,976 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:52:04,976 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L10(line 10) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L194 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: (and (<= main_~y~0 main_~b~0) (<= 1 main_~b~0)) [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L33-1(lines 32 43) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 47) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 47) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L44(line 44) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 43) the Hoare annotation is: (and (<= main_~y~0 main_~b~0) (<= 1 main_~b~0)) [2021-05-02 13:52:04,977 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 47) the Hoare annotation is: true [2021-05-02 13:52:04,977 INFO L194 CegarLoopUtils]: At program point L32-3(lines 32 43) the Hoare annotation is: (and (<= main_~y~0 main_~b~0) (= (* main_~a~0 main_~b~0) main_~z~0) (<= 1 main_~b~0)) [2021-05-02 13:52:04,977 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L37(lines 37 40) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L37-2(lines 37 40) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-05-02 13:52:04,977 INFO L198 CegarLoopUtils]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-05-02 13:52:04,978 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2021-05-02 13:52:04,978 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2021-05-02 13:52:04,978 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-05-02 13:52:04,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:52:04 BoogieIcfgContainer [2021-05-02 13:52:04,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:52:04,990 INFO L168 Benchmark]: Toolchain (without parser) took 53287.01 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 134.2 MB in the beginning and 158.2 MB in the end (delta: -24.0 MB). Peak memory consumption was 101.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:04,992 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 168.8 MB. Free memory is still 150.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:52:04,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.63 ms. Allocated memory is still 168.8 MB. Free memory was 134.0 MB in the beginning and 124.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:04,993 INFO L168 Benchmark]: Boogie Preprocessor took 55.08 ms. Allocated memory is still 168.8 MB. Free memory was 124.3 MB in the beginning and 152.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:04,993 INFO L168 Benchmark]: RCFGBuilder took 256.97 ms. Allocated memory is still 168.8 MB. Free memory was 151.7 MB in the beginning and 137.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:04,993 INFO L168 Benchmark]: TraceAbstraction took 52834.79 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 137.0 MB in the beginning and 158.2 MB in the end (delta: -21.2 MB). Peak memory consumption was 104.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:52:04,993 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 168.8 MB. Free memory is still 150.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 134.63 ms. Allocated memory is still 168.8 MB. Free memory was 134.0 MB in the beginning and 124.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.08 ms. Allocated memory is still 168.8 MB. Free memory was 124.3 MB in the beginning and 152.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 256.97 ms. Allocated memory is still 168.8 MB. Free memory was 151.7 MB in the beginning and 137.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 52834.79 ms. Allocated memory was 168.8 MB in the beginning and 203.4 MB in the end (delta: 34.6 MB). Free memory was 137.0 MB in the beginning and 158.2 MB in the end (delta: -21.2 MB). Peak memory consumption was 104.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 52540.4ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 8.1ms, AutomataDifference: 18197.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 215.9ms, InitialAbstractionConstructionTime: 22.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 109 SDtfs, 149 SDslu, 448 SDs, 0 SdLazy, 700 SolverSat, 39 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 17734.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 32055.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=4, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.1ms AutomataMinimizationTime, 6 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 19 PreInvPairs, 30 NumberOfFragments, 63 HoareAnnotationTreeSize, 19 FomulaSimplifications, 621 FormulaSimplificationTreeSizeReduction, 73.2ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 521 FormulaSimplificationTreeSizeReductionInter, 135.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 52.2ms SsaConstructionTime, 154.7ms SatisfiabilityAnalysisTime, 32698.4ms InterpolantComputationTime, 153 NumberOfCodeBlocks, 153 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 147 ConstructedInterpolants, 0 QuantifiedInterpolants, 910 SizeOfPredicates, 19 NumberOfNonLiveVariables, 631 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 15/36 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: y <= b && 1 <= b RESULT: Ultimate proved your program to be correct! Received shutdown request...