/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/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:02:08,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:02:08,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:02:08,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:02:08,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:02:08,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:02:08,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:02:08,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:02:08,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:02:08,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:02:08,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:02:08,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:02:08,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:02:08,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:02:08,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:02:08,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:02:08,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:02:08,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:02:08,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:02:08,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:02:08,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:02:08,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:02:08,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:02:08,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:02:08,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 19:02:08,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 19:02:08,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 19:02:08,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 19:02:08,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 19:02:08,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 19:02:08,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 19:02:08,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 19:02:08,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 19:02:08,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 19:02:08,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 19:02:08,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 19:02:08,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 19:02:08,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 19:02:08,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:02:08,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:02:08,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:02:08,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:02:08,631 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:02:08,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:02:08,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:02:08,639 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:02:08,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:02:08,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:02:08,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:02:08,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:02:08,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:02:08,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:02:08,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:02:08,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:02:08,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:02:08,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:02:08,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:02:08,645 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:02:08,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:02:08,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:02:08,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:02:08,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:02:08,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:02:08,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:02:08,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:02:09,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:02:09,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:02:09,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:02:09,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:02:09,166 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:02:09,167 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2021-02-23 19:02:09,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628f5eb78/62f246cd53c6437dafacac74c8e7c1f7/FLAGc6f1b993e [2021-02-23 19:02:10,110 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:02:10,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2021-02-23 19:02:10,120 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628f5eb78/62f246cd53c6437dafacac74c8e7c1f7/FLAGc6f1b993e [2021-02-23 19:02:10,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/628f5eb78/62f246cd53c6437dafacac74c8e7c1f7 [2021-02-23 19:02:10,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:02:10,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:02:10,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:02:10,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:02:10,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:02:10,477 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54315928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10, skipping insertion in model container [2021-02-23 19:02:10,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:02:10,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:02:10,714 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c[394,407] [2021-02-23 19:02:10,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:02:10,748 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:02:10,768 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c[394,407] [2021-02-23 19:02:10,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:02:10,807 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:02:10,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10 WrapperNode [2021-02-23 19:02:10,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:02:10,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:02:10,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:02:10,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:02:10,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,863 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... [2021-02-23 19:02:10,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:02:10,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:02:10,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:02:10,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:02:10,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:02:11,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:02:11,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:02:11,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:02:11,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:02:11,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:02:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:02:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:02:11,084 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:02:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:02:11,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:02:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:02:11,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:02:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:02:11,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:02:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:02:11,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:02:11,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:02:11,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:02:11,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:02:11,721 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:02:11,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:02:11 BoogieIcfgContainer [2021-02-23 19:02:11,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:02:11,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:02:11,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:02:11,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:02:11,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:02:10" (1/3) ... [2021-02-23 19:02:11,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d5bd97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:02:11, skipping insertion in model container [2021-02-23 19:02:11,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:02:10" (2/3) ... [2021-02-23 19:02:11,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d5bd97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:02:11, skipping insertion in model container [2021-02-23 19:02:11,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:02:11" (3/3) ... [2021-02-23 19:02:11,746 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c [2021-02-23 19:02:11,757 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:02:11,766 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:02:11,797 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:02:11,845 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:02:11,845 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:02:11,845 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:02:11,846 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:02:11,846 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:02:11,846 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:02:11,846 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:02:11,846 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:02:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-02-23 19:02:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 19:02:11,901 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:02:11,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:02:11,904 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:02:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:02:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash -600807621, now seen corresponding path program 1 times [2021-02-23 19:02:11,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:02:11,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579166472] [2021-02-23 19:02:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:02:12,066 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:02:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:12,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:12,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:12,347 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:12,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:12,492 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-23 19:02:12,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:02:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:12,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:12,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:02:12,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579166472] [2021-02-23 19:02:12,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:02:12,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 19:02:12,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669487427] [2021-02-23 19:02:12,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 19:02:12,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:02:12,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 19:02:12,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:02:12,615 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2021-02-23 19:02:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:02:12,763 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-02-23 19:02:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 19:02:12,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-02-23 19:02:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:02:12,775 INFO L225 Difference]: With dead ends: 66 [2021-02-23 19:02:12,775 INFO L226 Difference]: Without dead ends: 45 [2021-02-23 19:02:12,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:02:12,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-23 19:02:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-02-23 19:02:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-02-23 19:02:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-02-23 19:02:12,831 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 27 [2021-02-23 19:02:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:02:12,831 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-02-23 19:02:12,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 19:02:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-02-23 19:02:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 19:02:12,833 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:02:12,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:02:12,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:02:12,834 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:02:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:02:12,835 INFO L82 PathProgramCache]: Analyzing trace with hash -787369506, now seen corresponding path program 1 times [2021-02-23 19:02:12,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:02:12,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017947733] [2021-02-23 19:02:12,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:02:12,838 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:02:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:12,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:12,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:12,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:12,901 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 19:02:12,905 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:12,906 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:12,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:02:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:12,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:12,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:02:12,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017947733] [2021-02-23 19:02:12,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:02:12,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 19:02:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334669549] [2021-02-23 19:02:12,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 19:02:12,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:02:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 19:02:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 19:02:12,960 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2021-02-23 19:02:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:02:13,224 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-02-23 19:02:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 19:02:13,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-23 19:02:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:02:13,226 INFO L225 Difference]: With dead ends: 69 [2021-02-23 19:02:13,226 INFO L226 Difference]: Without dead ends: 62 [2021-02-23 19:02:13,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 19:02:13,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-23 19:02:13,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2021-02-23 19:02:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 19:02:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-02-23 19:02:13,264 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 29 [2021-02-23 19:02:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:02:13,265 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-02-23 19:02:13,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 19:02:13,265 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-02-23 19:02:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-23 19:02:13,271 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:02:13,271 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:02:13,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:02:13,272 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:02:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:02:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1401376936, now seen corresponding path program 1 times [2021-02-23 19:02:13,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:02:13,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293247662] [2021-02-23 19:02:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:02:13,869 WARN L202 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 45 [2021-02-23 19:02:13,883 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:02:13,889 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:02:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:14,039 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:14,040 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:14,071 WARN L141 QuantifierPusher]: treesize reduction 86, result has 62.8 percent of original size [2021-02-23 19:02:14,089 WARN L147 QuantifierPusher]: treesize reduction 86, result has 62.8 percent of original size 145 [2021-02-23 19:02:14,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:14,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 155 [2021-02-23 19:02:14,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:14,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:02:14,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:14,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:02:14,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:14,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:14,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:02:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:14,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:14,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:02:14,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293247662] [2021-02-23 19:02:14,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:02:14,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 19:02:14,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364312340] [2021-02-23 19:02:14,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 19:02:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:02:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 19:02:14,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:02:14,297 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 7 states. [2021-02-23 19:02:15,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:02:15,026 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2021-02-23 19:02:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 19:02:15,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-02-23 19:02:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:02:15,029 INFO L225 Difference]: With dead ends: 89 [2021-02-23 19:02:15,029 INFO L226 Difference]: Without dead ends: 58 [2021-02-23 19:02:15,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:02:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-23 19:02:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-02-23 19:02:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-02-23 19:02:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-02-23 19:02:15,053 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 35 [2021-02-23 19:02:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:02:15,053 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-02-23 19:02:15,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 19:02:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-02-23 19:02:15,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-23 19:02:15,055 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:02:15,055 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 19:02:15,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:02:15,055 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:02:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:02:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash -934796791, now seen corresponding path program 1 times [2021-02-23 19:02:15,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:02:15,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416127029] [2021-02-23 19:02:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:02:15,273 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-02-23 19:02:15,276 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-23 19:02:15,277 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:02:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:15,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:15,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:15,442 WARN L141 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size [2021-02-23 19:02:15,444 WARN L147 QuantifierPusher]: treesize reduction 1, result has 99.2 percent of original size 121 [2021-02-23 19:02:15,459 WARN L141 QuantifierPusher]: treesize reduction 36, result has 77.4 percent of original size [2021-02-23 19:02:15,461 WARN L147 QuantifierPusher]: treesize reduction 36, result has 77.4 percent of original size 123 [2021-02-23 19:02:15,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:15,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 168 [2021-02-23 19:02:15,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:15,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:02:15,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:15,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:02:15,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:15,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:15,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:02:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:02:15,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:02:15,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:02:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:02:15,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416127029] [2021-02-23 19:02:15,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:02:15,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 19:02:15,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696954336] [2021-02-23 19:02:15,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 19:02:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:02:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 19:02:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-23 19:02:15,620 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 7 states. [2021-02-23 19:02:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:02:16,100 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-02-23 19:02:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 19:02:16,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2021-02-23 19:02:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:02:16,102 INFO L225 Difference]: With dead ends: 90 [2021-02-23 19:02:16,102 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 19:02:16,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:02:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 19:02:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 19:02:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 19:02:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 19:02:16,104 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-02-23 19:02:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:02:16,105 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 19:02:16,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 19:02:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 19:02:16,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 19:02:16,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 19:02:16,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 19:02:16,798 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 19:02:16,798 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 19:02:16,798 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 19:02:16,798 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,799 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,799 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:02:16,799 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,799 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 19:02:16,799 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,800 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,800 INFO L192 CegarLoopUtils]: At program point L3-6(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,800 INFO L192 CegarLoopUtils]: At program point L3-7(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,800 INFO L192 CegarLoopUtils]: At program point L3-8(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,800 INFO L192 CegarLoopUtils]: At program point L3-9(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,800 INFO L192 CegarLoopUtils]: At program point L3-10(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,800 INFO L192 CegarLoopUtils]: At program point L3-11(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,801 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 19:02:16,801 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,801 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 19:02:16,801 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:02:16,802 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:02:16,802 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:02:16,802 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 19:02:16,802 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 19:02:16,802 INFO L185 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296))))))) [2021-02-23 19:02:16,803 INFO L192 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-02-23 19:02:16,803 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 14 35) the Hoare annotation is: true [2021-02-23 19:02:16,803 INFO L192 CegarLoopUtils]: At program point L25-1(lines 25 28) the Hoare annotation is: true [2021-02-23 19:02:16,803 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: (<= (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 6148914689804861440 .cse0) (* 4294967295 .cse1) (* 6148914688373205674 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296)) 2863311530)))) (* 1431655765 main_~x~0)) [2021-02-23 19:02:16,804 INFO L192 CegarLoopUtils]: At program point L25-2(line 25) the Hoare annotation is: true [2021-02-23 19:02:16,804 INFO L185 CegarLoopUtils]: At program point L23-1(line 23) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296))))))) [2021-02-23 19:02:16,804 INFO L192 CegarLoopUtils]: At program point L25-4(line 25) the Hoare annotation is: true [2021-02-23 19:02:16,804 INFO L185 CegarLoopUtils]: At program point L25-5(lines 18 31) the Hoare annotation is: (or (= main_~y~0 1) (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296)))))))) [2021-02-23 19:02:16,804 INFO L192 CegarLoopUtils]: At program point L19(lines 19 30) the Hoare annotation is: true [2021-02-23 19:02:16,805 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 14 35) the Hoare annotation is: true [2021-02-23 19:02:16,805 INFO L192 CegarLoopUtils]: At program point L32(lines 32 33) the Hoare annotation is: true [2021-02-23 19:02:16,805 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 14 35) the Hoare annotation is: true [2021-02-23 19:02:16,805 INFO L192 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: true [2021-02-23 19:02:16,805 INFO L192 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: true [2021-02-23 19:02:16,805 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-23 19:02:16,806 INFO L192 CegarLoopUtils]: At program point L26-1(line 26) the Hoare annotation is: true [2021-02-23 19:02:16,806 INFO L192 CegarLoopUtils]: At program point L22(lines 22 29) the Hoare annotation is: true [2021-02-23 19:02:16,806 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse3 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse3) 3))) (let ((.cse2 (div (+ main_~x~0 .cse3 (* .cse1 (- 3))) 4294967296))) (and (<= (* 1431655765 main_~x~0) (+ (* 6148914689804861440 .cse0) (* 4294967296 .cse1) (* 6148914689804861440 .cse2) 1431655765)) (<= (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 .cse2) 1) main_~x~0)))))) [2021-02-23 19:02:16,806 INFO L185 CegarLoopUtils]: At program point L20-1(line 20) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296))))))) [2021-02-23 19:02:16,807 INFO L185 CegarLoopUtils]: At program point L18-1(lines 18 31) the Hoare annotation is: (or (= main_~y~0 1) (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296)))))))) [2021-02-23 19:02:16,807 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-23 19:02:16,807 INFO L185 CegarLoopUtils]: At program point L18-2(line 18) the Hoare annotation is: (or (= main_~y~0 1) (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296)))))))) [2021-02-23 19:02:16,807 INFO L192 CegarLoopUtils]: At program point L18-4(line 18) the Hoare annotation is: true [2021-02-23 19:02:16,808 INFO L185 CegarLoopUtils]: At program point L18-5(lines 14 35) the Hoare annotation is: (or (= main_~y~0 1) (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (let ((.cse2 (* .cse0 (- 4294967296)))) (let ((.cse1 (div (+ main_~x~0 .cse2) 3))) (+ (* 4294967296 .cse0) (* 3 .cse1) (* 4294967296 (div (+ main_~x~0 .cse2 (* .cse1 (- 3))) 4294967296)))))))) [2021-02-23 19:02:16,808 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 8 12) the Hoare annotation is: true [2021-02-23 19:02:16,808 INFO L185 CegarLoopUtils]: At program point L10(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:02:16,808 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 8 12) the Hoare annotation is: true [2021-02-23 19:02:16,808 INFO L185 CegarLoopUtils]: At program point L9(lines 9 10) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-23 19:02:16,808 INFO L185 CegarLoopUtils]: At program point L10-1(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:02:16,809 INFO L192 CegarLoopUtils]: At program point L9-2(lines 8 12) the Hoare annotation is: true [2021-02-23 19:02:16,809 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:02:16,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:02:16 BoogieIcfgContainer [2021-02-23 19:02:16,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:02:16,832 INFO L168 Benchmark]: Toolchain (without parser) took 6383.13 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.6 MB in the beginning and 73.4 MB in the end (delta: 54.2 MB). Peak memory consumption was 97.6 MB. Max. memory is 8.0 GB. [2021-02-23 19:02:16,833 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 125.1 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:02:16,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.11 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:02:16,835 INFO L168 Benchmark]: Boogie Preprocessor took 93.60 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:02:16,835 INFO L168 Benchmark]: RCFGBuilder took 819.16 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 130.4 MB in the end (delta: -15.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 19:02:16,836 INFO L168 Benchmark]: TraceAbstraction took 5097.15 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.9 MB in the beginning and 73.4 MB in the end (delta: 56.5 MB). Peak memory consumption was 100.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:02:16,840 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 125.1 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 340.11 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 93.60 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 819.16 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 130.4 MB in the end (delta: -15.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5097.15 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.9 MB in the beginning and 73.4 MB in the end (delta: 56.5 MB). Peak memory consumption was 100.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: y == 1 || x <= 4294967296 * (x / 4294967296) + 3 * ((x + x / 4294967296 * -4294967296) / 3) + 4294967296 * ((x + x / 4294967296 * -4294967296 + (x + x / 4294967296 * -4294967296) / 3 * -3) / 4294967296) - ProcedureContractResult [Line: 14]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 8]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 174 SDslu, 191 SDs, 0 SdLazy, 377 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 53 LocationsWithAnnotation, 88 PreInvPairs, 136 NumberOfFragments, 521 HoareAnnotationTreeSize, 88 FomulaSimplifications, 4281 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 53 FomulaSimplificationsInter, 1023 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, 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 proved your program to be correct! Received shutdown request...