/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-15 22:53:48,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 22:53:48,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 22:53:48,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 22:53:48,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 22:53:48,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 22:53:48,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 22:53:48,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 22:53:48,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 22:53:48,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 22:53:48,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 22:53:48,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 22:53:48,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 22:53:48,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 22:53:48,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 22:53:48,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 22:53:48,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 22:53:48,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 22:53:48,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 22:53:48,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 22:53:48,476 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 [2021-04-15 22:53:48,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 22:53:48,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 22:53:48,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 22:53:48,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 22:53:48,506 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 22:53:48,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 22:53:48,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 22:53:48,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 22:53:48,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 22:53:48,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 22:53:48,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 22:53:48,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 22:53:48,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 22:53:48,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 22:53:48,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 22:53:48,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 22:53:48,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 22:53:48,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 22:53:48,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 22:53:48,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 22:53:48,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 22:53:48,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 22:53:48,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 22:53:48,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 22:53:48,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 22:53:48,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 22:53:48,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 22:53:48,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-04-15 22:53:48,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 22:53:48,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 22:53:48,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 22:53:48,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 22:53:48,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-15 22:53:48,797 INFO L275 PluginConnector]: CDTParser initialized [2021-04-15 22:53:48,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2021-04-15 22:53:48,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b803b8f/dee4acdbf824459b8c3cc117f9f732f2/FLAG2175b0433 [2021-04-15 22:53:49,180 INFO L306 CDTParser]: Found 1 translation units. [2021-04-15 22:53:49,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2021-04-15 22:53:49,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b803b8f/dee4acdbf824459b8c3cc117f9f732f2/FLAG2175b0433 [2021-04-15 22:53:49,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71b803b8f/dee4acdbf824459b8c3cc117f9f732f2 [2021-04-15 22:53:49,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 22:53:49,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 22:53:49,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-15 22:53:49,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-15 22:53:49,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-15 22:53:49,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c6e96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49, skipping insertion in model container [2021-04-15 22:53:49,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-15 22:53:49,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-15 22:53:49,701 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-04-15 22:53:49,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 22:53:49,746 INFO L203 MainTranslator]: Completed pre-run [2021-04-15 22:53:49,756 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c[600,613] [2021-04-15 22:53:49,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-15 22:53:49,785 INFO L208 MainTranslator]: Completed translation [2021-04-15 22:53:49,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49 WrapperNode [2021-04-15 22:53:49,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-15 22:53:49,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 22:53:49,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 22:53:49,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 22:53:49,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (1/1) ... [2021-04-15 22:53:49,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 22:53:49,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 22:53:49,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 22:53:49,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 22:53:49,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (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 [2021-04-15 22:53:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-15 22:53:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 22:53:49,910 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-15 22:53:49,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-15 22:53:49,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-15 22:53:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-15 22:53:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-04-15 22:53:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 22:53:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-15 22:53:50,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 22:53:50,156 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-04-15 22:53:50,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 10:53:50 BoogieIcfgContainer [2021-04-15 22:53:50,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 22:53:50,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 22:53:50,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 22:53:50,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 22:53:50,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 10:53:49" (1/3) ... [2021-04-15 22:53:50,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584d377a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 10:53:50, skipping insertion in model container [2021-04-15 22:53:50,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 10:53:49" (2/3) ... [2021-04-15 22:53:50,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584d377a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 10:53:50, skipping insertion in model container [2021-04-15 22:53:50,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 10:53:50" (3/3) ... [2021-04-15 22:53:50,162 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2021-04-15 22:53:50,168 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 22:53:50,171 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 22:53:50,181 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-15 22:53:50,198 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 22:53:50,198 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 22:53:50,198 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 22:53:50,198 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 22:53:50,198 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 22:53:50,198 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 22:53:50,198 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 22:53:50,199 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 22:53:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-04-15 22:53:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-04-15 22:53:50,211 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:50,211 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:50,211 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2021-04-15 22:53:50,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:50,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438868699] [2021-04-15 22:53:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:50,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:50,383 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:50,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438868699] [2021-04-15 22:53:50,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:50,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 22:53:50,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820605334] [2021-04-15 22:53:50,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 22:53:50,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 22:53:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 22:53:50,409 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:50,482 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2021-04-15 22:53:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 22:53:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-04-15 22:53:50,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:50,489 INFO L225 Difference]: With dead ends: 42 [2021-04-15 22:53:50,489 INFO L226 Difference]: Without dead ends: 23 [2021-04-15 22:53:50,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 22:53:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-04-15 22:53:50,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-04-15 22:53:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-04-15 22:53:50,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-04-15 22:53:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:50,515 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-04-15 22:53:50,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-04-15 22:53:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-04-15 22:53:50,515 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:50,516 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:50,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 22:53:50,516 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:50,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2021-04-15 22:53:50,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:50,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987115702] [2021-04-15 22:53:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:50,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,579 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,580 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:50,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,583 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:50,639 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:50,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987115702] [2021-04-15 22:53:50,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:50,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 22:53:50,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412805774] [2021-04-15 22:53:50,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 22:53:50,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 22:53:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 22:53:50,648 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:50,754 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-04-15 22:53:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 22:53:50,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-04-15 22:53:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:50,755 INFO L225 Difference]: With dead ends: 36 [2021-04-15 22:53:50,755 INFO L226 Difference]: Without dead ends: 33 [2021-04-15 22:53:50,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 22:53:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-15 22:53:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2021-04-15 22:53:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-04-15 22:53:50,760 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-04-15 22:53:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:50,760 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-04-15 22:53:50,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-04-15 22:53:50,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 22:53:50,760 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:50,760 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:50,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 22:53:50,761 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:50,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2021-04-15 22:53:50,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:50,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219456800] [2021-04-15 22:53:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:50,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:50,795 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:50,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:50,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219456800] [2021-04-15 22:53:50,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:50,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 22:53:50,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778998440] [2021-04-15 22:53:50,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 22:53:50,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:50,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 22:53:50,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 22:53:50,827 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:50,924 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-04-15 22:53:50,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 22:53:50,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-15 22:53:50,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:50,926 INFO L225 Difference]: With dead ends: 40 [2021-04-15 22:53:50,926 INFO L226 Difference]: Without dead ends: 31 [2021-04-15 22:53:50,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 22:53:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-04-15 22:53:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2021-04-15 22:53:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-04-15 22:53:50,939 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-04-15 22:53:50,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:50,939 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-04-15 22:53:50,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-04-15 22:53:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 22:53:50,941 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:50,941 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:50,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 22:53:50,941 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2021-04-15 22:53:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:50,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183549914] [2021-04-15 22:53:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:50,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:50,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:50,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:51,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,048 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:51,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183549914] [2021-04-15 22:53:51,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 22:53:51,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 22:53:51,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748207004] [2021-04-15 22:53:51,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 22:53:51,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:51,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 22:53:51,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 22:53:51,049 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:51,114 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2021-04-15 22:53:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 22:53:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-04-15 22:53:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:51,115 INFO L225 Difference]: With dead ends: 31 [2021-04-15 22:53:51,115 INFO L226 Difference]: Without dead ends: 21 [2021-04-15 22:53:51,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 22:53:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-04-15 22:53:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-04-15 22:53:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-04-15 22:53:51,122 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2021-04-15 22:53:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:51,122 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-04-15 22:53:51,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-04-15 22:53:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 22:53:51,123 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:51,123 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:51,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 22:53:51,123 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2021-04-15 22:53:51,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:51,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654840625] [2021-04-15 22:53:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:51,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,176 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-04-15 22:53:51,177 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-04-15 22:53:51,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:51,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654840625] [2021-04-15 22:53:51,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758903234] [2021-04-15 22:53:51,223 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 [2021-04-15 22:53:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:51,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 22:53:51,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 22:53:51,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,296 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-15 22:53:51,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-15 22:53:51,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-04-15 22:53:51,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,309 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,312 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,313 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,313 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 22:53:51,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 22:53:51,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 22:53:51,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-04-15 22:53:51,348 INFO L142 QuantifierPusher]: treesize reduction 1, result has 90.0 percent of original size [2021-04-15 22:53:51,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-04-15 22:53:51,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,355 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,355 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,355 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,356 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,356 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:51,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 22:53:51,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-04-15 22:53:51,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40501306] [2021-04-15 22:53:51,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 22:53:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 22:53:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 22:53:51,363 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:51,428 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-04-15 22:53:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 22:53:51,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-04-15 22:53:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:51,429 INFO L225 Difference]: With dead ends: 34 [2021-04-15 22:53:51,429 INFO L226 Difference]: Without dead ends: 23 [2021-04-15 22:53:51,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 22:53:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-04-15 22:53:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-04-15 22:53:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-04-15 22:53:51,440 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-04-15 22:53:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:51,440 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-04-15 22:53:51,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-04-15 22:53:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 22:53:51,441 INFO L511 BasicCegarLoop]: Found error trace [2021-04-15 22:53:51,441 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 22:53:51,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 22:53:51,656 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-15 22:53:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 22:53:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -846064617, now seen corresponding path program 2 times [2021-04-15 22:53:51,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 22:53:51,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811420105] [2021-04-15 22:53:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 22:53:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:51,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,688 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,689 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,691 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,691 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-15 22:53:51,697 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-04-15 22:53:51,697 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-04-15 22:53:51,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-15 22:53:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 22:53:51,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 22:53:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811420105] [2021-04-15 22:53:51,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086658424] [2021-04-15 22:53:51,735 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 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 [2021-04-15 22:53:51,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-04-15 22:53:51,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 22:53:51,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 22:53:51,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 22:53:51,776 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,779 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,782 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,782 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,787 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,787 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,788 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,788 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,789 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,789 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,789 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,797 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,798 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,798 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,798 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,799 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,800 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,800 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,801 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,801 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,807 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,807 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,808 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,808 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,809 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,810 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,813 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,814 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,819 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,821 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,822 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,823 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,825 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,825 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,826 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,826 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,827 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,827 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,828 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,829 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,829 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,830 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,830 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,831 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-15 22:53:51,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-04-15 22:53:51,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,836 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,836 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 22:53:51,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-15 22:53:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 22:53:51,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 22:53:51,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-04-15 22:53:51,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449204230] [2021-04-15 22:53:51,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 22:53:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 22:53:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 22:53:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 22:53:51,838 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 22:53:51,843 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-04-15 22:53:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 22:53:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-04-15 22:53:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 22:53:51,843 INFO L225 Difference]: With dead ends: 20 [2021-04-15 22:53:51,844 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 22:53:51,844 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 22:53:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 22:53:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 22:53:51,845 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) [2021-04-15 22:53:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 22:53:51,845 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-04-15 22:53:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 22:53:51,845 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 22:53:51,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-15 22:53:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 22:53:51,845 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 22:53:52,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 22:53:52,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#memory_int| |old(#memory_int)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |old(#valid)| |#valid|) (= |#t~string5.base| |old(#t~string5.base)|) (= |~#array~0.base| |old(~#array~0.base)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#array~0.offset| |old(~#array~0.offset)|)) [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-04-15 22:53:52,141 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 7 23) no Hoare annotation was computed. [2021-04-15 22:53:52,141 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 7 23) no Hoare annotation was computed. [2021-04-15 22:53:52,142 INFO L198 CegarLoopUtils]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2021-04-15 22:53:52,142 INFO L194 CegarLoopUtils]: At program point L13-3(lines 13 15) the Hoare annotation is: (= main_~a~0 1) [2021-04-15 22:53:52,142 INFO L198 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-04-15 22:53:52,142 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 7 23) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2021-04-15 22:53:52,143 INFO L194 CegarLoopUtils]: At program point L18(lines 8 23) the Hoare annotation is: false [2021-04-15 22:53:52,143 INFO L198 CegarLoopUtils]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2021-04-15 22:53:52,143 INFO L194 CegarLoopUtils]: At program point L14-3(lines 14 15) the Hoare annotation is: (= main_~a~0 1) [2021-04-15 22:53:52,143 INFO L198 CegarLoopUtils]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2021-04-15 22:53:52,143 INFO L194 CegarLoopUtils]: At program point L12-3(lines 12 15) the Hoare annotation is: (= main_~a~0 1) [2021-04-15 22:53:52,143 INFO L198 CegarLoopUtils]: For program point L12-4(lines 8 23) no Hoare annotation was computed. [2021-04-15 22:53:52,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 10:53:52 BoogieIcfgContainer [2021-04-15 22:53:52,153 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 22:53:52,153 INFO L168 Benchmark]: Toolchain (without parser) took 2553.70 ms. Allocated memory is still 191.9 MB. Free memory was 156.8 MB in the beginning and 115.8 MB in the end (delta: 40.9 MB). Peak memory consumption was 41.2 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:52,153 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 173.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-15 22:53:52,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.19 ms. Allocated memory is still 191.9 MB. Free memory was 156.6 MB in the beginning and 143.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:52,154 INFO L168 Benchmark]: Boogie Preprocessor took 58.81 ms. Allocated memory is still 191.9 MB. Free memory was 143.4 MB in the beginning and 175.0 MB in the end (delta: -31.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:52,154 INFO L168 Benchmark]: RCFGBuilder took 311.95 ms. Allocated memory is still 191.9 MB. Free memory was 175.0 MB in the beginning and 159.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:52,158 INFO L168 Benchmark]: TraceAbstraction took 1994.58 ms. Allocated memory is still 191.9 MB. Free memory was 159.8 MB in the beginning and 115.8 MB in the end (delta: 43.9 MB). Peak memory consumption was 45.0 MB. Max. memory is 8.0 GB. [2021-04-15 22:53:52,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 173.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 183.19 ms. Allocated memory is still 191.9 MB. Free memory was 156.6 MB in the beginning and 143.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.81 ms. Allocated memory is still 191.9 MB. Free memory was 143.4 MB in the beginning and 175.0 MB in the end (delta: -31.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.95 ms. Allocated memory is still 191.9 MB. Free memory was 175.0 MB in the beginning and 159.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1994.58 ms. Allocated memory is still 191.9 MB. Free memory was 159.8 MB in the beginning and 115.8 MB in the end (delta: 43.9 MB). Peak memory consumption was 45.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1868.9ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 7.9ms, AutomataDifference: 438.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 75.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 87 SDtfs, 66 SDslu, 56 SDs, 0 SdLazy, 128 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 172.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 343.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.2ms AutomataMinimizationTime, 6 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 15 NumberOfFragments, 55 HoareAnnotationTreeSize, 8 FomulaSimplifications, 514 FormulaSimplificationTreeSizeReduction, 33.5ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 36.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 35.5ms SsaConstructionTime, 140.0ms SatisfiabilityAnalysisTime, 577.8ms InterpolantComputationTime, 117 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 419 SizeOfPredicates, 7 NumberOfNonLiveVariables, 232 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 15/21 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: 14]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: a == 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...