/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/dijkstra-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:45:39,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:45:39,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:45:39,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:45:39,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:45:39,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:45:39,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:45:39,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:45:39,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:45:39,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:45:39,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:45:39,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:45:39,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:45:39,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:45:39,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:45:39,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:45:39,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:45:39,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:45:39,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:45:39,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:45:39,762 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 [2021-05-06 01:45:39,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:45:39,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:45:39,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:45:39,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:45:39,809 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:45:39,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:45:39,809 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:45:39,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:45:39,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:45:39,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:45:39,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:45:39,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:45:39,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:45:39,811 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:45:39,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:45:39,811 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:45:39,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:45:39,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:45:39,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:45:39,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:45:39,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:45:39,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:45:39,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:45:39,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:45:39,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:45:39,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:45:39,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:45:39,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:45:39,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:45:40,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:45:40,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:45:40,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:45:40,148 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:45:40,148 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:45:40,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-05-06 01:45:40,202 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a980d3f3/a98958b5873240a79e4b3d441bff7c5c/FLAG04b06928b [2021-05-06 01:45:40,665 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:45:40,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound1.c [2021-05-06 01:45:40,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a980d3f3/a98958b5873240a79e4b3d441bff7c5c/FLAG04b06928b [2021-05-06 01:45:40,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a980d3f3/a98958b5873240a79e4b3d441bff7c5c [2021-05-06 01:45:40,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:45:40,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:45:40,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:45:40,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:45:40,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:45:40,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d777b6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40, skipping insertion in model container [2021-05-06 01:45:40,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:45:40,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:45:40,827 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/dijkstra-u_valuebound1.c[533,546] [2021-05-06 01:45:40,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:45:40,890 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:45:40,913 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/dijkstra-u_valuebound1.c[533,546] [2021-05-06 01:45:40,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:45:40,956 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:45:40,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40 WrapperNode [2021-05-06 01:45:40,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:45:40,958 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:45:40,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:45:40,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:45:40,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:40,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (1/1) ... [2021-05-06 01:45:41,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:45:41,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:45:41,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:45:41,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:45:41,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (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 [2021-05-06 01:45:41,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:45:41,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:45:41,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:45:41,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:45:41,077 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:45:41,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:45:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:45:41,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:45:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:45:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:45:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 01:45:41,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:45:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:45:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:45:41,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:45:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:45:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:45:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:45:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:45:41,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:45:41,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:45:41,397 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 01:45:41,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:45:41 BoogieIcfgContainer [2021-05-06 01:45:41,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:45:41,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:45:41,399 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:45:41,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:45:41,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:45:40" (1/3) ... [2021-05-06 01:45:41,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa2971a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:45:41, skipping insertion in model container [2021-05-06 01:45:41,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:45:40" (2/3) ... [2021-05-06 01:45:41,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa2971a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:45:41, skipping insertion in model container [2021-05-06 01:45:41,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:45:41" (3/3) ... [2021-05-06 01:45:41,404 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound1.c [2021-05-06 01:45:41,408 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:45:41,411 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:45:41,425 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:45:41,459 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:45:41,460 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:45:41,460 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:45:41,460 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:45:41,460 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:45:41,460 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:45:41,460 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:45:41,460 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:45:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 01:45:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:45:41,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:45:41,478 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] [2021-05-06 01:45:41,478 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:45:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:45:41,487 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-06 01:45:41,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:45:41,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527441011] [2021-05-06 01:45:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:45:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:41,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:45:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:41,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:45:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:41,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 01:45:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:45:41,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:45:41,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527441011] [2021-05-06 01:45:41,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527441011] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:45:41,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:45:41,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:45:41,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101192577] [2021-05-06 01:45:41,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:45:41,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:45:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:45:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:45:41,713 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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) [2021-05-06 01:45:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:45:45,769 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-06 01:45:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:45:45,771 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 [2021-05-06 01:45:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:45:45,777 INFO L225 Difference]: With dead ends: 69 [2021-05-06 01:45:45,778 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 01:45:45,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:45:45,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 01:45:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 01:45:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 01:45:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-06 01:45:45,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-06 01:45:45,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:45:45,841 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-06 01:45:45,841 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) [2021-05-06 01:45:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-06 01:45:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 01:45:45,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:45:45,842 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:45:45,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:45:45,843 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:45:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:45:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-06 01:45:45,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:45:45,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205041381] [2021-05-06 01:45:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:45:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:46,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:45:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:46,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:45:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:46,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 01:45:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:45:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:45:46,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:45:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205041381] [2021-05-06 01:45:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205041381] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:45:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:45:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 01:45:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054961103] [2021-05-06 01:45:46,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:45:46,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:45:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:45:46,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:45:46,203 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 01:46:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:46:23,079 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2021-05-06 01:46:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:46:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-06 01:46:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:46:23,081 INFO L225 Difference]: With dead ends: 68 [2021-05-06 01:46:23,081 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 01:46:23,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 01:46:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 01:46:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-05-06 01:46:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 01:46:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-06 01:46:23,102 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2021-05-06 01:46:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:46:23,102 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-06 01:46:23,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 01:46:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-06 01:46:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 01:46:23,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:46:23,104 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:46:23,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 01:46:23,104 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:46:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:46:23,105 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-05-06 01:46:23,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:46:23,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932377902] [2021-05-06 01:46:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:46:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:46:23,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:46:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:46:23,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:46:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:46:23,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 01:46:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:46:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:46:23,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:46:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932377902] [2021-05-06 01:46:23,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932377902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:46:23,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499335843] [2021-05-06 01:46:23,333 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 [2021-05-06 01:46:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:46:23,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 01:46:23,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:46:23,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:46:23,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:46:23,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:46:23,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:46:23,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:46:23,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:46:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 01:46:23,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499335843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:46:23,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 01:46:23,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-06 01:46:23,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399970105] [2021-05-06 01:46:23,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 01:46:23,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:46:23,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 01:46:23,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 01:46:23,713 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)