/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:20:40,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:20:40,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:20:40,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:20:40,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:20:40,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:20:40,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:20:40,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:20:40,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:20:40,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:20:40,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:20:40,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:20:40,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:20:40,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:20:40,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:20:40,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:20:40,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:20:40,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:20:40,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:20:40,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:20:40,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:20:40,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:20:40,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:20:40,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:20:40,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:20:40,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:20:40,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:20:40,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:20:40,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:20:40,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:20:40,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:20:40,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:20:40,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:20:40,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:20:40,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:20:40,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:20:40,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:20:40,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:20:40,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:20:40,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:20:40,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:20:40,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:20:40,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:20:40,635 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:20:40,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:20:41,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:20:41,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:20:41,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:20:41,121 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:20:41,122 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:20:41,123 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2021-05-01 08:20:41,256 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aaae6ead/4efe3e90af7349f6ba4469943640d785/FLAGcffc3f0a5 [2021-05-01 08:20:41,897 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:20:41,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c [2021-05-01 08:20:41,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aaae6ead/4efe3e90af7349f6ba4469943640d785/FLAGcffc3f0a5 [2021-05-01 08:20:41,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aaae6ead/4efe3e90af7349f6ba4469943640d785 [2021-05-01 08:20:41,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:20:41,920 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:20:41,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:41,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:20:41,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:20:41,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b742d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:41, skipping insertion in model container [2021-05-01 08:20:41,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:20:41,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:20:42,168 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c[533,546] [2021-05-01 08:20:42,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:42,284 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:20:42,297 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound2.c[533,546] [2021-05-01 08:20:42,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:42,333 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:20:42,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42 WrapperNode [2021-05-01 08:20:42,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:42,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:20:42,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:20:42,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:20:42,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... [2021-05-01 08:20:42,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:20:42,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:20:42,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:20:42,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:20:42,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:20:42,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:20:42,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:20:42,446 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:20:42,446 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:20:42,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:20:42,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:20:42,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:20:42,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:20:42,447 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:20:42,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:20:42,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:20:42,447 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:20:42,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:20:42,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:20:42,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:20:42,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:20:42,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:20:42,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:20:42,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:20:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:20:42,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:20:42,791 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:20:42,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:42 BoogieIcfgContainer [2021-05-01 08:20:42,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:20:42,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:20:42,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:20:42,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:20:42,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:20:41" (1/3) ... [2021-05-01 08:20:42,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509d22be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:42, skipping insertion in model container [2021-05-01 08:20:42,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42" (2/3) ... [2021-05-01 08:20:42,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509d22be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:20:42, skipping insertion in model container [2021-05-01 08:20:42,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:42" (3/3) ... [2021-05-01 08:20:42,802 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound2.c [2021-05-01 08:20:42,807 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:20:42,810 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:20:42,822 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:20:42,844 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:20:42,844 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:20:42,845 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:20:42,845 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:20:42,845 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:20:42,845 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:20:42,845 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:20:42,845 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:20:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-01 08:20:42,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:20:42,866 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:42,866 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] [2021-05-01 08:20:42,867 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:42,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-01 08:20:42,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:42,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619170700] [2021-05-01 08:20:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:42,968 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,133 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,134 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,240 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,241 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:20:43,246 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:43,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619170700] [2021-05-01 08:20:43,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [619170700] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:43,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:43,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:20:43,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629639674] [2021-05-01 08:20:43,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:20:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:43,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:20:43,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:43,276 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:20:46,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:20:46,832 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-01 08:20:46,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:20:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-01 08:20:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:20:46,840 INFO L225 Difference]: With dead ends: 69 [2021-05-01 08:20:46,840 INFO L226 Difference]: Without dead ends: 33 [2021-05-01 08:20:46,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-01 08:20:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-01 08:20:46,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-01 08:20:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-01 08:20:46,878 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-01 08:20:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:20:46,878 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-01 08:20:46,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 08:20:46,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-01 08:20:46,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 08:20:46,880 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:46,880 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] [2021-05-01 08:20:46,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:20:46,880 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:46,881 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-01 08:20:46,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:46,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307928239] [2021-05-01 08:20:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:46,884 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:46,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:46,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:46,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:46,976 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:20:46,990 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.2 percent of original size [2021-05-01 08:20:46,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 08:20:47,052 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.6 percent of original size [2021-05-01 08:20:47,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-05-01 08:20:47,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:47,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:47,107 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,108 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:47,161 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:47,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:47,184 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:20:47,189 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:47,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307928239] [2021-05-01 08:20:47,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [307928239] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:47,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:47,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 08:20:47,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365332746] [2021-05-01 08:20:47,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 08:20:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 08:20:47,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 08:20:47,194 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-01 08:20:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:20:54,844 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-05-01 08:20:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 08:20:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-01 08:20:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:20:54,847 INFO L225 Difference]: With dead ends: 46 [2021-05-01 08:20:54,847 INFO L226 Difference]: Without dead ends: 44 [2021-05-01 08:20:54,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-01 08:20:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-01 08:20:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-05-01 08:20:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-01 08:20:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-05-01 08:20:54,879 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-05-01 08:20:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:20:54,880 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-05-01 08:20:54,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-01 08:20:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-05-01 08:20:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-01 08:20:54,881 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:54,881 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] [2021-05-01 08:20:54,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:20:54,881 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-05-01 08:20:54,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:54,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029451036] [2021-05-01 08:20:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:54,884 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:54,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:54,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:54,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:54,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:20:54,966 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-05-01 08:20:54,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 08:20:54,999 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-05-01 08:20:55,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-05-01 08:20:55,064 INFO L142 QuantifierPusher]: treesize reduction 16, result has 83.2 percent of original size [2021-05-01 08:20:55,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-05-01 08:20:55,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:55,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:55,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:55,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:55,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:55,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:55,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:55,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:55,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:55,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:55,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:55,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:55,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:55,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:55,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:20:55,183 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:55,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029451036] [2021-05-01 08:20:55,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029451036] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:55,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:55,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 08:20:55,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686675448] [2021-05-01 08:20:55,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 08:20:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 08:20:55,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 08:20:55,185 INFO L87 Difference]: Start difference. First operand 41 states and 53 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) [2021-05-01 08:21:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:17,321 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2021-05-01 08:21:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 08:21:17,571 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 [2021-05-01 08:21:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:17,572 INFO L225 Difference]: With dead ends: 60 [2021-05-01 08:21:17,572 INFO L226 Difference]: Without dead ends: 58 [2021-05-01 08:21:17,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-01 08:21:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-01 08:21:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2021-05-01 08:21:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-01 08:21:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2021-05-01 08:21:17,584 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 26 [2021-05-01 08:21:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:17,584 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2021-05-01 08:21:17,584 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) [2021-05-01 08:21:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2021-05-01 08:21:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 08:21:17,585 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:17,585 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] [2021-05-01 08:21:17,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:21:17,585 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-05-01 08:21:17,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:17,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478053925] [2021-05-01 08:21:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:17,588 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:17,596 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:21:17,597 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:21:17,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 08:21:17,610 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:21:17,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:21:17 BoogieIcfgContainer [2021-05-01 08:21:17,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:21:17,616 INFO L168 Benchmark]: Toolchain (without parser) took 35690.75 ms. Allocated memory was 194.0 MB in the beginning and 242.2 MB in the end (delta: 48.2 MB). Free memory was 158.1 MB in the beginning and 180.7 MB in the end (delta: -22.6 MB). Peak memory consumption was 26.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:17,616 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 194.0 MB. Free memory is still 175.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:21:17,616 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.65 ms. Allocated memory is still 194.0 MB. Free memory was 157.8 MB in the beginning and 175.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:17,617 INFO L168 Benchmark]: Boogie Preprocessor took 42.05 ms. Allocated memory is still 194.0 MB. Free memory was 175.9 MB in the beginning and 174.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:17,617 INFO L168 Benchmark]: RCFGBuilder took 412.66 ms. Allocated memory is still 194.0 MB. Free memory was 174.3 MB in the beginning and 156.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:17,619 INFO L168 Benchmark]: TraceAbstraction took 34813.73 ms. Allocated memory was 194.0 MB in the beginning and 242.2 MB in the end (delta: 48.2 MB). Free memory was 156.0 MB in the beginning and 180.7 MB in the end (delta: -24.7 MB). Peak memory consumption was 25.1 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:17,625 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 194.0 MB. Free memory is still 175.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 401.65 ms. Allocated memory is still 194.0 MB. Free memory was 157.8 MB in the beginning and 175.9 MB in the end (delta: -18.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.05 ms. Allocated memory is still 194.0 MB. Free memory was 175.9 MB in the beginning and 174.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 412.66 ms. Allocated memory is still 194.0 MB. Free memory was 174.3 MB in the beginning and 156.5 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34813.73 ms. Allocated memory was 194.0 MB in the beginning and 242.2 MB in the end (delta: 48.2 MB). Free memory was 156.0 MB in the beginning and 180.7 MB in the end (delta: -24.7 MB). Peak memory consumption was 25.1 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<=2) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=2) [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: 34758.3ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 13.7ms, AutomataDifference: 33632.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 102 SDtfs, 88 SDslu, 153 SDs, 0 SdLazy, 323 SolverSat, 84 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 30795.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 802.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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: 64.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 18 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...