/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/recursive-simple/id_b3_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:30:14,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:30:14,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:30:14,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:30:14,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:30:14,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:30:14,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:30:14,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:30:14,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:30:14,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:30:14,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:30:14,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:30:14,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:30:14,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:30:14,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:30:14,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:30:14,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:30:14,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:30:14,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:30:14,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:30:14,183 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 [2021-02-23 13:30:14,211 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:30:14,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:30:14,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:30:14,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:30:14,214 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:30:14,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:30:14,214 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:30:14,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:30:14,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:30:14,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:30:14,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:30:14,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:30:14,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:30:14,215 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:30:14,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:30:14,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:30:14,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:30:14,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:30:14,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:30:14,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:30:14,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:30:14,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:30:14,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:30:14,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:30:14,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:30:14,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:30:14,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:30:14,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:30:14,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:30:14,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:30:14,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:30:14,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:30:14,676 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:30:14,677 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:30:14,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c [2021-02-23 13:30:14,769 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9719bfc93/bd2e8ce2d52f4bf1aa8227b7d3a846d2/FLAGc5f7abeaa [2021-02-23 13:30:15,401 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:30:15,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c [2021-02-23 13:30:15,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9719bfc93/bd2e8ce2d52f4bf1aa8227b7d3a846d2/FLAGc5f7abeaa [2021-02-23 13:30:15,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9719bfc93/bd2e8ce2d52f4bf1aa8227b7d3a846d2 [2021-02-23 13:30:15,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:30:15,783 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:30:15,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:30:15,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:30:15,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:30:15,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:30:15" (1/1) ... [2021-02-23 13:30:15,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e53442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:15, skipping insertion in model container [2021-02-23 13:30:15,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:30:15" (1/1) ... [2021-02-23 13:30:15,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:30:15,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:30:16,013 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c[528,541] [2021-02-23 13:30:16,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:30:16,026 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:30:16,042 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o5-2.c[528,541] [2021-02-23 13:30:16,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:30:16,058 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:30:16,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16 WrapperNode [2021-02-23 13:30:16,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:30:16,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:30:16,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:30:16,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:30:16,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (1/1) ... [2021-02-23 13:30:16,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (1/1) ... [2021-02-23 13:30:16,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (1/1) ... [2021-02-23 13:30:16,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (1/1) ... [2021-02-23 13:30:16,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (1/1) ... [2021-02-23 13:30:16,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (1/1) ... [2021-02-23 13:30:16,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (1/1) ... [2021-02-23 13:30:16,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:30:16,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:30:16,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:30:16,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:30:16,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (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 [2021-02-23 13:30:16,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:30:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:30:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:30:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-02-23 13:30:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:30:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:30:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:30:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:30:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:30:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:30:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-02-23 13:30:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:30:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:30:16,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:30:16,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:30:16,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:30:16,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:30:16,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:30:16,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:30:16,460 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 13:30:16,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:30:16 BoogieIcfgContainer [2021-02-23 13:30:16,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:30:16,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:30:16,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:30:16,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:30:16,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:30:15" (1/3) ... [2021-02-23 13:30:16,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c81fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:30:16, skipping insertion in model container [2021-02-23 13:30:16,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:30:16" (2/3) ... [2021-02-23 13:30:16,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c81fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:30:16, skipping insertion in model container [2021-02-23 13:30:16,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:30:16" (3/3) ... [2021-02-23 13:30:16,471 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o5-2.c [2021-02-23 13:30:16,480 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:30:16,486 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:30:16,510 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:30:16,540 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:30:16,540 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:30:16,540 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:30:16,540 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:30:16,541 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:30:16,541 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:30:16,541 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:30:16,541 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:30:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-02-23 13:30:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-23 13:30:16,585 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:30:16,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:30:16,586 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:30:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:30:16,613 INFO L82 PathProgramCache]: Analyzing trace with hash -211895392, now seen corresponding path program 1 times [2021-02-23 13:30:16,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:30:16,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405402081] [2021-02-23 13:30:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:30:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:16,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:16,823 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:16,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:16,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:16,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:16,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:16,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:16,855 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:16,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:30:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:16,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:16,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:16,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:30:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:16,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:16,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:16,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:16,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:30:16,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405402081] [2021-02-23 13:30:16,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:30:16,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:30:16,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723775288] [2021-02-23 13:30:16,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:30:16,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:30:17,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:30:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:30:17,005 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2021-02-23 13:30:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:30:17,228 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-02-23 13:30:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:30:17,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-23 13:30:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:30:17,240 INFO L225 Difference]: With dead ends: 34 [2021-02-23 13:30:17,240 INFO L226 Difference]: Without dead ends: 20 [2021-02-23 13:30:17,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:30:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-23 13:30:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-23 13:30:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-23 13:30:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-02-23 13:30:17,292 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2021-02-23 13:30:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:30:17,293 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-02-23 13:30:17,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:30:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-02-23 13:30:17,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:30:17,295 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:30:17,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:30:17,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:30:17,296 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:30:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:30:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash -351670379, now seen corresponding path program 1 times [2021-02-23 13:30:17,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:30:17,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850143553] [2021-02-23 13:30:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:30:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,351 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:30:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,392 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:30:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:30:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,462 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,464 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,464 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 13:30:17,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850143553] [2021-02-23 13:30:17,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:30:17,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:30:17,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245264911] [2021-02-23 13:30:17,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:30:17,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:30:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:30:17,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:30:17,480 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2021-02-23 13:30:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:30:17,691 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-02-23 13:30:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:30:17,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2021-02-23 13:30:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:30:17,693 INFO L225 Difference]: With dead ends: 32 [2021-02-23 13:30:17,693 INFO L226 Difference]: Without dead ends: 24 [2021-02-23 13:30:17,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:30:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-02-23 13:30:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-02-23 13:30:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-23 13:30:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-02-23 13:30:17,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 21 [2021-02-23 13:30:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:30:17,715 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-02-23 13:30:17,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:30:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-02-23 13:30:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:30:17,717 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:30:17,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:30:17,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:30:17,718 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:30:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:30:17,718 INFO L82 PathProgramCache]: Analyzing trace with hash -323041228, now seen corresponding path program 1 times [2021-02-23 13:30:17,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:30:17,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70016701] [2021-02-23 13:30:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:30:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,769 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:30:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,830 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:30:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,869 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:30:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:17,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:17,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 13:30:17,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70016701] [2021-02-23 13:30:17,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346610260] [2021-02-23 13:30:17,916 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 [2021-02-23 13:30:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:17,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-23 13:30:17,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-23 13:30:18,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,010 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,015 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,018 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,022 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,024 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,027 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,033 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,041 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,042 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,043 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,045 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,047 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,047 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,048 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,052 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,052 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,053 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,057 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,057 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,058 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,059 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,060 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,061 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,063 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,064 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,065 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,079 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,112 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,134 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 13:30:18,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:30:18,141 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 13:30:18,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:30:18,147 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,149 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:30:18,149 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,150 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,153 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,157 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,162 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,177 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,185 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:30:18,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:30:18,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:30:18,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,195 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-23 13:30:18,196 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-23 13:30:18,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-23 13:30:18,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-23 13:30:18,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-02-23 13:30:18,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833624759] [2021-02-23 13:30:18,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 13:30:18,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:30:18,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 13:30:18,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-23 13:30:18,204 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 10 states. [2021-02-23 13:30:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:30:18,481 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-02-23 13:30:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 13:30:18,482 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2021-02-23 13:30:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:30:18,483 INFO L225 Difference]: With dead ends: 28 [2021-02-23 13:30:18,483 INFO L226 Difference]: Without dead ends: 24 [2021-02-23 13:30:18,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-02-23 13:30:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-02-23 13:30:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-02-23 13:30:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-02-23 13:30:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-02-23 13:30:18,491 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-02-23 13:30:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:30:18,492 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-02-23 13:30:18,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 13:30:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-02-23 13:30:18,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 13:30:18,493 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:30:18,494 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:30:18,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-23 13:30:18,708 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:30:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:30:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1614351959, now seen corresponding path program 1 times [2021-02-23 13:30:18,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:30:18,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580295562] [2021-02-23 13:30:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:30:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:18,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:30:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:18,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:30:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:18,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:30:18,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:30:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:18,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-02-23 13:30:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:30:18,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:30:18,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:30:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-23 13:30:18,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580295562] [2021-02-23 13:30:18,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:30:18,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:30:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145181867] [2021-02-23 13:30:18,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:30:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:30:18,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:30:18,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:30:18,861 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2021-02-23 13:30:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:30:19,025 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-02-23 13:30:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:30:19,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2021-02-23 13:30:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:30:19,026 INFO L225 Difference]: With dead ends: 24 [2021-02-23 13:30:19,026 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:30:19,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:30:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:30:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:30:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:30:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:30:19,028 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-02-23 13:30:19,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:30:19,028 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:30:19,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:30:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:30:19,029 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:30:19,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:30:19,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:30:19,097 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-02-23 13:30:19,097 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-02-23 13:30:19,097 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-02-23 13:30:19,097 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:30:19,098 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 13:30:19,098 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:30:19,098 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:30:19,098 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:30:19,098 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:30:19,098 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:30:19,099 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-02-23 13:30:19,099 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 13 19) the Hoare annotation is: true [2021-02-23 13:30:19,099 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 13 19) no Hoare annotation was computed. [2021-02-23 13:30:19,099 INFO L189 CegarLoopUtils]: For program point L17(line 17) no Hoare annotation was computed. [2021-02-23 13:30:19,099 INFO L189 CegarLoopUtils]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-02-23 13:30:19,099 INFO L192 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-02-23 13:30:19,099 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-23 13:30:19,100 INFO L189 CegarLoopUtils]: For program point L16-2(lines 13 19) no Hoare annotation was computed. [2021-02-23 13:30:19,100 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2021-02-23 13:30:19,100 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2021-02-23 13:30:19,100 INFO L189 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-02-23 13:30:19,100 INFO L192 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-02-23 13:30:19,100 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2021-02-23 13:30:19,100 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-23 13:30:19,100 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-02-23 13:30:19,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:30:19 BoogieIcfgContainer [2021-02-23 13:30:19,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:30:19,108 INFO L168 Benchmark]: Toolchain (without parser) took 3337.75 ms. Allocated memory was 154.1 MB in the beginning and 191.9 MB in the end (delta: 37.7 MB). Free memory was 129.9 MB in the beginning and 136.6 MB in the end (delta: -6.7 MB). Peak memory consumption was 32.3 MB. Max. memory is 8.0 GB. [2021-02-23 13:30:19,108 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 154.1 MB. Free memory was 126.3 MB in the beginning and 126.2 MB in the end (delta: 102.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:30:19,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.84 ms. Allocated memory is still 154.1 MB. Free memory was 128.9 MB in the beginning and 119.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:30:19,109 INFO L168 Benchmark]: Boogie Preprocessor took 33.78 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 118.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:30:19,110 INFO L168 Benchmark]: RCFGBuilder took 367.54 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 105.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-23 13:30:19,110 INFO L168 Benchmark]: TraceAbstraction took 2642.80 ms. Allocated memory was 154.1 MB in the beginning and 191.9 MB in the end (delta: 37.7 MB). Free memory was 104.8 MB in the beginning and 136.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:30:19,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 154.1 MB. Free memory was 126.3 MB in the beginning and 126.2 MB in the end (delta: 102.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.84 ms. Allocated memory is still 154.1 MB. Free memory was 128.9 MB in the beginning and 119.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.78 ms. Allocated memory is still 154.1 MB. Free memory was 119.6 MB in the beginning and 118.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 367.54 ms. Allocated memory is still 154.1 MB. Free memory was 118.2 MB in the beginning and 105.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2642.80 ms. Allocated memory was 154.1 MB in the beginning and 191.9 MB in the end (delta: 37.7 MB). Free memory was 104.8 MB in the beginning and 136.6 MB in the end (delta: -31.9 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 58 SDslu, 105 SDs, 0 SdLazy, 238 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 37 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 120 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 5618 SizeOfPredicates, 1 NumberOfNonLiveVariables, 114 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...