/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 08:03:40,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 08:03:40,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 08:03:40,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 08:03:40,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 08:03:40,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 08:03:40,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 08:03:40,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 08:03:40,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 08:03:40,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 08:03:40,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 08:03:40,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 08:03:40,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 08:03:40,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 08:03:40,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 08:03:40,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 08:03:40,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 08:03:40,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 08:03:40,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 08:03:40,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 08:03:40,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 08:03:40,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 08:03:40,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 08:03:40,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 08:03:40,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-16 08:03:40,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-16 08:03:40,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-16 08:03:40,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-16 08:03:40,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-16 08:03:40,229 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-16 08:03:40,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-16 08:03:40,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-16 08:03:40,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-16 08:03:40,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-16 08:03:40,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-16 08:03:40,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-16 08:03:40,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-16 08:03:40,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-16 08:03:40,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 08:03:40,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 08:03:40,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 08:03:40,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-04-16 08:03:40,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 08:03:40,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 08:03:40,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 08:03:40,251 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 08:03:40,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 08:03:40,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 08:03:40,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 08:03:40,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 08:03:40,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 08:03:40,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 08:03:40,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 08:03:40,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 08:03:40,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 08:03:40,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 08:03:40,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 08:03:40,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 08:03:40,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 08:03:40,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 08:03:40,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 08:03:40,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 08:03:40,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-04-16 08:03:40,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 08:03:40,254 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-04-16 08:03:40,254 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 08:03:40,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 08:03:40,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 08:03:40,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 08:03:40,542 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 08:03:40,542 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 08:03:40,543 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2021-04-16 08:03:40,589 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7425ef54/30c865d0e4c14a1484ab75e8c37636eb/FLAG5a104cd17 [2021-04-16 08:03:40,945 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 08:03:40,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c [2021-04-16 08:03:40,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7425ef54/30c865d0e4c14a1484ab75e8c37636eb/FLAG5a104cd17 [2021-04-16 08:03:41,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7425ef54/30c865d0e4c14a1484ab75e8c37636eb [2021-04-16 08:03:41,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 08:03:41,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 08:03:41,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 08:03:41,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 08:03:41,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 08:03:41,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a97588e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41, skipping insertion in model container [2021-04-16 08:03:41,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 08:03:41,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 08:03:41,536 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[533,546] [2021-04-16 08:03:41,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:03:41,592 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 08:03:41,608 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound10.c[533,546] [2021-04-16 08:03:41,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 08:03:41,655 INFO L208 MainTranslator]: Completed translation [2021-04-16 08:03:41,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41 WrapperNode [2021-04-16 08:03:41,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 08:03:41,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 08:03:41,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 08:03:41,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 08:03:41,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (1/1) ... [2021-04-16 08:03:41,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 08:03:41,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 08:03:41,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 08:03:41,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 08:03:41,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (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 [2021-04-16 08:03:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 08:03:41,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 08:03:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 08:03:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 08:03:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 08:03:41,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 08:03:41,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 08:03:41,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 08:03:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 08:03:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 08:03:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-04-16 08:03:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 08:03:41,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 08:03:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 08:03:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 08:03:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 08:03:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 08:03:41,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 08:03:41,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 08:03:41,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 08:03:42,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 08:03:42,088 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-16 08:03:42,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:03:42 BoogieIcfgContainer [2021-04-16 08:03:42,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 08:03:42,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 08:03:42,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 08:03:42,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 08:03:42,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 08:03:41" (1/3) ... [2021-04-16 08:03:42,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2102605f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:03:42, skipping insertion in model container [2021-04-16 08:03:42,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 08:03:41" (2/3) ... [2021-04-16 08:03:42,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2102605f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 08:03:42, skipping insertion in model container [2021-04-16 08:03:42,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 08:03:42" (3/3) ... [2021-04-16 08:03:42,094 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound10.c [2021-04-16 08:03:42,103 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-04-16 08:03:42,106 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 08:03:42,121 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 08:03:42,149 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 08:03:42,150 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 08:03:42,150 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-04-16 08:03:42,150 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 08:03:42,150 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 08:03:42,150 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 08:03:42,150 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 08:03:42,150 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 08:03:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-04-16 08:03:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-16 08:03:42,175 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:03:42,175 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:03:42,176 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:03:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:03:42,182 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-04-16 08:03:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:03:42,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008598447] [2021-04-16 08:03:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:03:42,247 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:03:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:42,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:42,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:42,368 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:42,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:42,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:03:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:42,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:42,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:42,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:03:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:42,465 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:42,466 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:42,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:42,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:42,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:03:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:42,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:42,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:42,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:42,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:03:42,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008598447] [2021-04-16 08:03:42,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:03:42,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 08:03:42,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834497672] [2021-04-16 08:03:42,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 08:03:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:03:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 08:03:42,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:03:42,499 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-04-16 08:03:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:03:45,977 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-04-16 08:03:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 08:03:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-04-16 08:03:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:03:45,985 INFO L225 Difference]: With dead ends: 69 [2021-04-16 08:03:45,986 INFO L226 Difference]: Without dead ends: 33 [2021-04-16 08:03:45,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 08:03:46,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-04-16 08:03:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-04-16 08:03:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-04-16 08:03:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-04-16 08:03:46,070 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-04-16 08:03:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:03:46,070 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-04-16 08:03:46,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-04-16 08:03:46,075 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-04-16 08:03:46,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-16 08:03:46,077 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:03:46,077 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:03:46,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 08:03:46,089 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:03:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:03:46,090 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-04-16 08:03:46,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:03:46,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995005093] [2021-04-16 08:03:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:03:46,093 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:03:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:46,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,223 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:46,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:03:46,237 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.2 percent of original size [2021-04-16 08:03:46,239 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-04-16 08:03:46,295 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.6 percent of original size [2021-04-16 08:03:46,297 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-04-16 08:03:46,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:03:46,396 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,397 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:03:46,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,419 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:46,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:03:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:46,507 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:46,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:03:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:46,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,515 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:46,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:03:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:46,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:46,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:03:46,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995005093] [2021-04-16 08:03:46,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:03:46,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-16 08:03:46,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386754971] [2021-04-16 08:03:46,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-16 08:03:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:03:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-16 08:03:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-16 08:03:46,554 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:03:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:03:54,607 INFO L93 Difference]: Finished difference Result 68 states and 98 transitions. [2021-04-16 08:03:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-16 08:03:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-04-16 08:03:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:03:54,610 INFO L225 Difference]: With dead ends: 68 [2021-04-16 08:03:54,610 INFO L226 Difference]: Without dead ends: 50 [2021-04-16 08:03:54,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-16 08:03:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-04-16 08:03:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-04-16 08:03:54,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-04-16 08:03:54,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-04-16 08:03:54,661 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 24 [2021-04-16 08:03:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:03:54,661 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-04-16 08:03:54,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:03:54,662 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-04-16 08:03:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-16 08:03:54,662 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:03:54,663 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:03:54,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 08:03:54,663 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:03:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:03:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-04-16 08:03:54,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:03:54,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438814742] [2021-04-16 08:03:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:03:54,678 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:03:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:54,733 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:54,734 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:54,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:54,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 08:03:54,739 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-04-16 08:03:54,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-04-16 08:03:54,770 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-04-16 08:03:54,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-04-16 08:03:54,845 INFO L142 QuantifierPusher]: treesize reduction 8, result has 91.8 percent of original size [2021-04-16 08:03:54,850 INFO L147 QuantifierPusher]: treesize reduction 9, result has 89.9 percent of original size 80 [2021-04-16 08:03:54,919 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:54,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:03:54,932 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:54,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-04-16 08:03:54,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:54,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:54,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 08:03:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:55,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:55,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:55,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-04-16 08:03:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:55,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:55,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:55,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-04-16 08:03:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 08:03:55,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 08:03:55,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 08:03:55,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-16 08:03:55,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438814742] [2021-04-16 08:03:55,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 08:03:55,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-16 08:03:55,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402308959] [2021-04-16 08:03:55,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-16 08:03:55,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-04-16 08:03:55,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-16 08:03:55,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-04-16 08:03:55,033 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:04:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 08:04:19,614 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2021-04-16 08:04:19,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-16 08:04:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-04-16 08:04:19,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 08:04:19,820 INFO L225 Difference]: With dead ends: 57 [2021-04-16 08:04:19,820 INFO L226 Difference]: Without dead ends: 55 [2021-04-16 08:04:19,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 611.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-04-16 08:04:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-04-16 08:04:19,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-04-16 08:04:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-04-16 08:04:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2021-04-16 08:04:19,838 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 26 [2021-04-16 08:04:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 08:04:19,838 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2021-04-16 08:04:19,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-04-16 08:04:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2021-04-16 08:04:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-16 08:04:19,839 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 08:04:19,839 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 08:04:19,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-16 08:04:19,839 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 08:04:19,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 08:04:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-04-16 08:04:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-04-16 08:04:19,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230110141] [2021-04-16 08:04:19,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 08:04:19,842 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-04-16 08:04:19,850 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-04-16 08:04:19,850 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 08:04:19,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-16 08:04:19,862 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-04-16 08:04:19,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 08:04:19 BoogieIcfgContainer [2021-04-16 08:04:19,863 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 08:04:19,875 INFO L168 Benchmark]: Toolchain (without parser) took 38491.41 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 122.9 MB in the beginning and 66.0 MB in the end (delta: 56.8 MB). Peak memory consumption was 87.4 MB. Max. memory is 8.0 GB. [2021-04-16 08:04:19,876 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 157.3 MB. Free memory was 139.3 MB in the beginning and 139.2 MB in the end (delta: 141.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 08:04:19,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.70 ms. Allocated memory is still 157.3 MB. Free memory was 122.6 MB in the beginning and 140.2 MB in the end (delta: -17.6 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:04:19,877 INFO L168 Benchmark]: Boogie Preprocessor took 34.06 ms. Allocated memory is still 157.3 MB. Free memory was 139.6 MB in the beginning and 138.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-16 08:04:19,877 INFO L168 Benchmark]: RCFGBuilder took 397.86 ms. Allocated memory is still 157.3 MB. Free memory was 138.1 MB in the beginning and 121.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-04-16 08:04:19,877 INFO L168 Benchmark]: TraceAbstraction took 37782.27 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 120.8 MB in the beginning and 66.0 MB in the end (delta: 54.8 MB). Peak memory consumption was 86.7 MB. Max. memory is 8.0 GB. [2021-04-16 08:04:19,879 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 157.3 MB. Free memory was 139.3 MB in the beginning and 139.2 MB in the end (delta: 141.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.70 ms. Allocated memory is still 157.3 MB. Free memory was 122.6 MB in the beginning and 140.2 MB in the end (delta: -17.6 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.06 ms. Allocated memory is still 157.3 MB. Free memory was 139.6 MB in the beginning and 138.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 397.86 ms. Allocated memory is still 157.3 MB. Free memory was 138.1 MB in the beginning and 121.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 37782.27 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 120.8 MB in the beginning and 66.0 MB in the end (delta: 54.8 MB). Peak memory consumption was 86.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] unsigned int n, p, q, r, h; [L22] n = __VERIFIER_nondet_unsigned_int() [L23] CALL assume_abort_if_not(n>=0 && n<=10) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=10) [L24] CALL assume_abort_if_not(n < 4294967295 / 4) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(n < 4294967295 / 4) [L26] p = 0 [L27] q = 1 [L28] r = n [L29] h = 0 [L30] COND TRUE 1 [L31] COND TRUE !(q <= n) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(r < 2 * p + q) [L12] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(r < 2 * p + q) [L40] CALL __VERIFIER_assert(p*p + r*q == n*q) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 37705.8ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 16.3ms, AutomataDifference: 36358.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 105 SDtfs, 89 SDslu, 163 SDs, 0 SdLazy, 323 SolverSat, 100 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 32004.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1165.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 105.4ms AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...