/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_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:20:40,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:20:40,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:20:40,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 08:20:40,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 08:20:40,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 08:20:40,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 08:20:40,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 08:20:40,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 08:20:40,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 08:20:40,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 08:20:40,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 08:20:40,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:20:40,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:20:40,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:20:40,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:20:40,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:20:40,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:20:40,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:20:40,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:20:40,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:20:40,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:20:40,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:20:40,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:20:40,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-01 08:20:40,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-01 08:20:40,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-01 08:20:40,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-01 08:20:40,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-01 08:20:40,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-01 08:20:40,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-01 08:20:40,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-01 08:20:40,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-01 08:20:40,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-01 08:20:40,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-01 08:20:40,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-01 08:20:40,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-01 08:20:40,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-01 08:20:40,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:20:40,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:20:40,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:20:40,576 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 08:20:40,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:20:40,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:20:40,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:20:40,594 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:20:40,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:20:40,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:20:40,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:20:40,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:20:40,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:20:40,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:20:40,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:20:40,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:20:40,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:20:40,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:20:40,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:20:40,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:20:40,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:20:40,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:20:40,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:20:40,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:20:40,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:20:40,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:20:40,598 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:20:40,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:20:40,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:20:40,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:20:40,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:20:41,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:20:41,001 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:20:41,002 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-05-01 08:20:41,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d211e4ec/ba36303b0333475387995a49deecc4f2/FLAG15aab70c7 [2021-05-01 08:20:41,543 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:20:41,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound20.c [2021-05-01 08:20:41,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d211e4ec/ba36303b0333475387995a49deecc4f2/FLAG15aab70c7 [2021-05-01 08:20:41,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d211e4ec/ba36303b0333475387995a49deecc4f2 [2021-05-01 08:20:41,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:20:41,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:20:41,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:41,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:20:41,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:20:41,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287326c3 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 08:20:41,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:20:41" (1/1) ... [2021-05-01 08:20:41,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:20:41,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:20:42,108 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_valuebound20.c[533,546] [2021-05-01 08:20:42,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:42,173 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:20:42,191 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_valuebound20.c[533,546] [2021-05-01 08:20:42,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:20:42,265 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:20:42,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:20:42 WrapperNode [2021-05-01 08:20:42,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:20:42,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:20:42,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:20:42,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:20:42,303 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 08:20:42,303 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 08:20:42,333 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 08:20:42,334 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 08:20:42,344 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 08:20:42,349 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 08:20:42,351 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 08:20:42,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:20:42,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:20:42,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:20:42,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:20:42,356 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 08:20:42,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:20:42,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:20:42,481 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:20:42,481 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:20:42,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:20:42,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:20:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:20:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:20:42,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:20:42,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:20:42,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-01 08:20:42,484 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:20:42,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:20:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:20:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:20:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:20:42,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:20:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:20:42,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:20:42,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:20:42,932 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:20:42,933 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:20:42,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:20:42 BoogieIcfgContainer [2021-05-01 08:20:42,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:20:42,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:20:42,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:20:42,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:20:42,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:20:41" (1/3) ... [2021-05-01 08:20:42,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8529ee 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 08:20:42,942 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 08:20:42,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8529ee 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 08:20:42,943 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 08:20:42,945 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound20.c [2021-05-01 08:20:42,951 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:20:42,956 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:20:42,975 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:20:42,998 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:20:42,998 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:20:42,998 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:20:42,999 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:20:42,999 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:20:42,999 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:20:42,999 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:20:42,999 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:20:43,034 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 08:20:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-01 08:20:43,043 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:43,044 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 08:20:43,044 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:43,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash 223850557, now seen corresponding path program 1 times [2021-05-01 08:20:43,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:43,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420178929] [2021-05-01 08:20:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:43,137 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,305 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,312 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,429 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,430 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,436 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,437 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,438 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,439 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:43,444 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:43,446 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:43,447 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 08:20:43,449 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:43,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420178929] [2021-05-01 08:20:43,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1420178929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:43,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:43,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 08:20:43,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192324129] [2021-05-01 08:20:43,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 08:20:43,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:43,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 08:20:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:43,477 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 08:20:46,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:20:46,099 INFO L93 Difference]: Finished difference Result 69 states and 113 transitions. [2021-05-01 08:20:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 08:20:46,102 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 08:20:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:20:46,111 INFO L225 Difference]: With dead ends: 69 [2021-05-01 08:20:46,111 INFO L226 Difference]: Without dead ends: 33 [2021-05-01 08:20:46,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 08:20:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-01 08:20:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-01 08:20:46,170 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 08:20:46,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-01 08:20:46,174 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-01 08:20:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:20:46,175 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-01 08:20:46,175 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 08:20:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-01 08:20:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 08:20:46,194 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:20:46,194 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 08:20:46,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:20:46,194 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:20:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:20:46,195 INFO L82 PathProgramCache]: Analyzing trace with hash -563604624, now seen corresponding path program 1 times [2021-05-01 08:20:46,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:20:46,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364220871] [2021-05-01 08:20:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:20:46,199 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:20:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:46,460 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:46,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:46,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:46,467 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:20:46,517 INFO L142 QuantifierPusher]: treesize reduction 4, result has 94.2 percent of original size [2021-05-01 08:20:46,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-05-01 08:20:46,669 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 14 [2021-05-01 08:20:46,689 INFO L142 QuantifierPusher]: treesize reduction 4, result has 95.6 percent of original size [2021-05-01 08:20:46,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-05-01 08:20:46,826 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-05-01 08:20:46,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:46,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:46,863 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:46,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:20:46,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:46,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:20:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:47,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:20:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:47,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,046 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:20:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:20:47,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:20:47,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:20:47,057 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 08:20:47,057 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:20:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364220871] [2021-05-01 08:20:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [364220871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:20:47,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:20:47,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 08:20:47,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623567988] [2021-05-01 08:20:47,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 08:20:47,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:20:47,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 08:20:47,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 08:20:47,061 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 08:20:47,555 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-01 08:21:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:22,088 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-01 08:21:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 08:21:22,089 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 08:21:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:22,092 INFO L225 Difference]: With dead ends: 48 [2021-05-01 08:21:22,092 INFO L226 Difference]: Without dead ends: 46 [2021-05-01 08:21:22,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 967.6ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-01 08:21:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-01 08:21:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-05-01 08:21:22,109 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 08:21:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-05-01 08:21:22,111 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 24 [2021-05-01 08:21:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:22,111 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-05-01 08:21:22,112 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 08:21:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-05-01 08:21:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-01 08:21:22,113 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:22,113 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 08:21:22,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:21:22,113 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:22,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:22,114 INFO L82 PathProgramCache]: Analyzing trace with hash -5094773, now seen corresponding path program 1 times [2021-05-01 08:21:22,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:22,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610264914] [2021-05-01 08:21:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:22,117 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:22,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:22,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:21:22,185 INFO L142 QuantifierPusher]: treesize reduction 2, result has 89.5 percent of original size [2021-05-01 08:21:22,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 08:21:22,213 INFO L142 QuantifierPusher]: treesize reduction 3, result has 97.0 percent of original size [2021-05-01 08:21:22,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 98 [2021-05-01 08:21:22,290 INFO L142 QuantifierPusher]: treesize reduction 17, result has 82.5 percent of original size [2021-05-01 08:21:22,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-05-01 08:21:22,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:21:22,363 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,364 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:21:22,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:22,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:21:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:22,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,447 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:22,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:21:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:22,452 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,452 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:22,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-01 08:21:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:21:22,469 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:21:22,470 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:21:22,470 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 08:21:22,470 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:21:22,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610264914] [2021-05-01 08:21:22,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1610264914] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:21:22,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:21:22,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 08:21:22,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438052639] [2021-05-01 08:21:22,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 08:21:22,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:21:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 08:21:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 08:21:22,473 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 08:21:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:21:57,842 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2021-05-01 08:21:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 08:21:57,857 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 08:21:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:21:57,859 INFO L225 Difference]: With dead ends: 76 [2021-05-01 08:21:57,859 INFO L226 Difference]: Without dead ends: 58 [2021-05-01 08:21:57,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 647.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-05-01 08:21:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-01 08:21:57,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-05-01 08:21:57,899 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) [2021-05-01 08:21:57,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2021-05-01 08:21:57,908 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 26 [2021-05-01 08:21:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:21:57,909 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2021-05-01 08:21:57,909 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 08:21:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2021-05-01 08:21:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 08:21:57,912 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:21:57,913 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 08:21:57,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:21:57,913 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:21:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:21:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash 598206390, now seen corresponding path program 1 times [2021-05-01 08:21:57,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:21:57,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117530494] [2021-05-01 08:21:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:21:57,924 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:21:57,955 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-01 08:21:57,956 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 08:21:57,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 08:21:57,989 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-01 08:21:57,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 08:21:57 BoogieIcfgContainer [2021-05-01 08:21:57,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 08:21:57,997 INFO L168 Benchmark]: Toolchain (without parser) took 76064.59 ms. Allocated memory was 185.6 MB in the beginning and 234.9 MB in the end (delta: 49.3 MB). Free memory was 151.7 MB in the beginning and 211.0 MB in the end (delta: -59.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:21:57,997 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 185.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:21:57,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.60 ms. Allocated memory is still 185.6 MB. Free memory was 151.5 MB in the beginning and 168.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:57,999 INFO L168 Benchmark]: Boogie Preprocessor took 85.76 ms. Allocated memory is still 185.6 MB. Free memory was 168.9 MB in the beginning and 167.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:58,000 INFO L168 Benchmark]: RCFGBuilder took 580.69 ms. Allocated memory is still 185.6 MB. Free memory was 167.0 MB in the beginning and 150.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:21:58,000 INFO L168 Benchmark]: TraceAbstraction took 75054.18 ms. Allocated memory was 185.6 MB in the beginning and 234.9 MB in the end (delta: 49.3 MB). Free memory was 149.5 MB in the beginning and 211.0 MB in the end (delta: -61.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:21:58,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 185.6 MB. Free memory is still 168.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.60 ms. Allocated memory is still 185.6 MB. Free memory was 151.5 MB in the beginning and 168.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.76 ms. Allocated memory is still 185.6 MB. Free memory was 168.9 MB in the beginning and 167.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 580.69 ms. Allocated memory is still 185.6 MB. Free memory was 167.0 MB in the beginning and 150.2 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 75054.18 ms. Allocated memory was 185.6 MB in the beginning and 234.9 MB in the end (delta: 49.3 MB). Free memory was 149.5 MB in the beginning and 211.0 MB in the end (delta: -61.5 MB). There was no memory consumed. 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<=20) [L9] COND FALSE !(!cond) [L23] RET assume_abort_if_not(n>=0 && n<=20) [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: 74972.6ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 35.9ms, AutomataDifference: 73078.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 101 SDtfs, 92 SDslu, 129 SDs, 0 SdLazy, 305 SolverSat, 107 SolverUnsat, 31 SolverUnknown, 0 SolverNotchecked, 66576.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1706.9ms 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: 104.5ms AutomataMinimizationTime, 3 MinimizatonAttempts, 10 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...