/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:23:36,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:23:36,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:23:36,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:23:36,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:23:36,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:23:36,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:23:36,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:23:36,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:23:36,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:23:36,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:23:36,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:23:36,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:23:36,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:23:36,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:23:36,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:23:36,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:23:36,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:23:36,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:23:36,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:23:36,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:23:36,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:23:36,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:23:36,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:23:36,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 17:23:36,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 17:23:36,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 17:23:36,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 17:23:36,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 17:23:36,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 17:23:36,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:23:36,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:23:36,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:23:36,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:23:36,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:23:36,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:23:36,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:23:36,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:23:36,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:23:36,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:23:36,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:23:36,535 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 17:23:36,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:23:36,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:23:36,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:23:36,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:23:36,568 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:23:36,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:23:36,569 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:23:36,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:23:36,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:23:36,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:23:36,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:23:36,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:23:36,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:23:36,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:23:36,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:23:36,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:23:36,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:23:36,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:23:36,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:23:36,839 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:23:36,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2021-05-02 17:23:36,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b962f99/b4a7fe3914f847cbaec3df1652605700/FLAG183830005 [2021-05-02 17:23:37,199 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:23:37,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound1.c [2021-05-02 17:23:37,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b962f99/b4a7fe3914f847cbaec3df1652605700/FLAG183830005 [2021-05-02 17:23:37,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06b962f99/b4a7fe3914f847cbaec3df1652605700 [2021-05-02 17:23:37,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:23:37,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:23:37,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:23:37,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:23:37,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:23:37,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c17f02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37, skipping insertion in model container [2021-05-02 17:23:37,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:23:37,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:23:37,722 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/sqrt1-ll_valuebound1.c[520,533] [2021-05-02 17:23:37,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:23:37,736 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:23:37,744 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/sqrt1-ll_valuebound1.c[520,533] [2021-05-02 17:23:37,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:23:37,757 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:23:37,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37 WrapperNode [2021-05-02 17:23:37,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:23:37,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:23:37,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:23:37,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:23:37,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (1/1) ... [2021-05-02 17:23:37,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:23:37,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:23:37,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:23:37,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:23:37,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (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 [2021-05-02 17:23:37,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:23:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:23:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:23:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:23:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:23:37,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:23:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:23:37,880 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:23:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:23:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:23:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:23:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:23:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:23:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:23:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:23:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:23:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:23:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:23:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:23:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:23:38,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:23:38,104 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:23:38,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:23:38 BoogieIcfgContainer [2021-05-02 17:23:38,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:23:38,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:23:38,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:23:38,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:23:38,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:23:37" (1/3) ... [2021-05-02 17:23:38,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba48ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:23:38, skipping insertion in model container [2021-05-02 17:23:38,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:23:37" (2/3) ... [2021-05-02 17:23:38,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba48ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:23:38, skipping insertion in model container [2021-05-02 17:23:38,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:23:38" (3/3) ... [2021-05-02 17:23:38,110 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound1.c [2021-05-02 17:23:38,114 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:23:38,117 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:23:38,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:23:38,155 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:23:38,155 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:23:38,155 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:23:38,155 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:23:38,155 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:23:38,156 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:23:38,156 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:23:38,156 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:23:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:23:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:23:38,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:38,178 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:38,178 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:38,182 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-02 17:23:38,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:38,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933926322] [2021-05-02 17:23:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:38,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:23:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:38,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:23:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:38,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:38,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933926322] [2021-05-02 17:23:38,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933926322] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:23:38,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:23:38,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:23:38,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412610783] [2021-05-02 17:23:38,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:23:38,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:38,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:23:38,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:23:38,441 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:38,559 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-02 17:23:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:23:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:23:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:38,566 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:23:38,566 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:23:38,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:23:38,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:23:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:23:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:23:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-02 17:23:38,595 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-02 17:23:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:38,595 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-02 17:23:38,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-02 17:23:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:23:38,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:38,596 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:38,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:23:38,597 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-02 17:23:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:38,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182286134] [2021-05-02 17:23:38,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:38,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:23:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:38,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:23:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:38,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:38,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182286134] [2021-05-02 17:23:38,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182286134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:23:38,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:23:38,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:23:38,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673986703] [2021-05-02 17:23:38,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:23:38,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:23:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:38,732 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:38,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:38,959 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-02 17:23:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:38,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 17:23:38,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:38,962 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:23:38,962 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 17:23:38,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 17:23:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-02 17:23:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:23:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 17:23:38,982 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-02 17:23:38,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:38,982 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 17:23:38,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:23:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 17:23:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:23:38,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:38,983 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:38,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:23:38,984 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:38,987 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2021-05-02 17:23:38,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:38,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268555627] [2021-05-02 17:23:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:39,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:39,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904494047] [2021-05-02 17:23:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:39,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 17:23:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:23:39,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:39,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268555627] [2021-05-02 17:23:39,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:39,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904494047] [2021-05-02 17:23:39,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904494047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:39,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:39,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559807771] [2021-05-02 17:23:39,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:39,222 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:23:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:39,332 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 17:23:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 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 22 [2021-05-02 17:23:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:39,334 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:23:39,334 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 17:23:39,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 17:23:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 17:23:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:23:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-02 17:23:39,344 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-02 17:23:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:39,345 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-02 17:23:39,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:23:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-02 17:23:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:23:39,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:39,347 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:39,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:23:39,554 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2021-05-02 17:23:39,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:39,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137404178] [2021-05-02 17:23:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:39,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:39,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801915598] [2021-05-02 17:23:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:23:39,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:23:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:23:39,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:39,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137404178] [2021-05-02 17:23:39,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:39,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801915598] [2021-05-02 17:23:39,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801915598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:39,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:39,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 17:23:39,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120220229] [2021-05-02 17:23:39,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:23:39,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:39,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:23:39,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:23:39,739 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 17:23:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:39,816 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-05-02 17:23:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:23:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 17:23:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:39,817 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:23:39,817 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 17:23:39,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:23:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 17:23:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 17:23:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 17:23:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-05-02 17:23:39,824 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2021-05-02 17:23:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:39,824 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-05-02 17:23:39,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 17:23:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-05-02 17:23:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:23:39,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:39,825 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:40,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:40,041 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2021-05-02 17:23:40,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:40,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875419578] [2021-05-02 17:23:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:40,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:40,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127901411] [2021-05-02 17:23:40,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:40,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:23:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:23:40,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 17:23:40,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:40,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875419578] [2021-05-02 17:23:40,242 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:40,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127901411] [2021-05-02 17:23:40,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127901411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:40,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:40,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:40,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388002016] [2021-05-02 17:23:40,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:40,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:40,247 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:23:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:40,394 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 17:23:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:23:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 17:23:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:40,395 INFO L225 Difference]: With dead ends: 57 [2021-05-02 17:23:40,396 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 17:23:40,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 17:23:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 17:23:40,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 17:23:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 17:23:40,402 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2021-05-02 17:23:40,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:40,403 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 17:23:40,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 17:23:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 17:23:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:23:40,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:40,403 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:40,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:40,619 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:40,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2021-05-02 17:23:40,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:40,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890307276] [2021-05-02 17:23:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:40,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:40,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246985883] [2021-05-02 17:23:40,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:40,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 17:23:40,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:23:40,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:40,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 17:23:40,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:40,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890307276] [2021-05-02 17:23:40,809 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:40,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246985883] [2021-05-02 17:23:40,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246985883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:40,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:40,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:23:40,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92308074] [2021-05-02 17:23:40,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:23:40,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:40,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:23:40,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:23:40,810 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:23:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:40,900 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-02 17:23:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:23:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 17:23:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:40,902 INFO L225 Difference]: With dead ends: 61 [2021-05-02 17:23:40,902 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 17:23:40,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:23:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 17:23:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 17:23:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 17:23:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-05-02 17:23:40,908 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 44 [2021-05-02 17:23:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:40,908 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-05-02 17:23:40,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 17:23:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-05-02 17:23:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 17:23:40,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:23:40,909 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:23:41,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:41,121 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:23:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:23:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash -463567166, now seen corresponding path program 4 times [2021-05-02 17:23:41,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:23:41,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301579045] [2021-05-02 17:23:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:23:41,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:23:41,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172324456] [2021-05-02 17:23:41,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:23:41,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:23:41,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:23:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:23:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:23:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:23:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 17:23:41,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:23:41,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301579045] [2021-05-02 17:23:41,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:23:41,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172324456] [2021-05-02 17:23:41,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172324456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:23:41,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:23:41,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:23:41,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494085186] [2021-05-02 17:23:41,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:23:41,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:23:41,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:23:41,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:23:41,380 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:23:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:23:41,426 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-02 17:23:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:23:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 17:23:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:23:41,427 INFO L225 Difference]: With dead ends: 56 [2021-05-02 17:23:41,427 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:23:41,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:23:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:23:41,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:23:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 17:23:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:23:41,429 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2021-05-02 17:23:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:23:41,429 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:23:41,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 17:23:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:23:41,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:23:41,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:23:41,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:23:42,133 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 17:23:42,133 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 17:23:42,133 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 17:23:42,133 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:23:42,133 INFO L194 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|)) [2021-05-02 17:23:42,133 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 17:23:42,134 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 1))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4) .cse1) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)))) [2021-05-02 17:23:42,134 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 1))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4) .cse1) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)))) [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2021-05-02 17:23:42,134 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4))) [2021-05-02 17:23:42,135 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 1))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4) .cse1) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)))) [2021-05-02 17:23:42,135 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2021-05-02 17:23:42,135 INFO L194 CegarLoopUtils]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~n~0)) (.cse1 (<= main_~n~0 1))) (or (and .cse0 (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4) .cse1) (and .cse0 .cse1 (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)))) [2021-05-02 17:23:42,135 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= main_~a~0 0) (= (+ (* main_~a~0 2) 1) main_~t~0) (= main_~s~0 1)) (and (= main_~s~0 (+ main_~t~0 1)) (= main_~a~0 1) (= main_~s~0 4))) [2021-05-02 17:23:42,135 INFO L201 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-05-02 17:23:42,135 INFO L198 CegarLoopUtils]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-05-02 17:23:42,135 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= main_~a~0 0) (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-02 17:23:42,135 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 17:23:42,135 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 17:23:42,135 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 17:23:42,135 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:23:42,135 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 17:23:42,135 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 17:23:42,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:23:42 BoogieIcfgContainer [2021-05-02 17:23:42,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:23:42,147 INFO L168 Benchmark]: Toolchain (without parser) took 4529.27 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 160.2 MB in the beginning and 177.0 MB in the end (delta: -16.8 MB). Peak memory consumption was 119.2 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:42,148 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 196.1 MB. Free memory was 176.7 MB in the beginning and 176.5 MB in the end (delta: 190.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:42,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 139.26 ms. Allocated memory is still 196.1 MB. Free memory was 160.0 MB in the beginning and 150.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:42,148 INFO L168 Benchmark]: Boogie Preprocessor took 19.84 ms. Allocated memory is still 196.1 MB. Free memory was 150.3 MB in the beginning and 148.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:42,148 INFO L168 Benchmark]: RCFGBuilder took 325.97 ms. Allocated memory is still 196.1 MB. Free memory was 148.9 MB in the beginning and 165.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:42,148 INFO L168 Benchmark]: TraceAbstraction took 4040.13 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 165.0 MB in the beginning and 177.0 MB in the end (delta: -12.1 MB). Peak memory consumption was 124.3 MB. Max. memory is 8.0 GB. [2021-05-02 17:23:42,148 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 196.1 MB. Free memory was 176.7 MB in the beginning and 176.5 MB in the end (delta: 190.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 139.26 ms. Allocated memory is still 196.1 MB. Free memory was 160.0 MB in the beginning and 150.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.84 ms. Allocated memory is still 196.1 MB. Free memory was 150.3 MB in the beginning and 148.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 325.97 ms. Allocated memory is still 196.1 MB. Free memory was 148.9 MB in the beginning and 165.5 MB in the end (delta: -16.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4040.13 ms. Allocated memory was 196.1 MB in the beginning and 235.9 MB in the end (delta: 39.8 MB). Free memory was 165.0 MB in the beginning and 177.0 MB in the end (delta: -12.1 MB). Peak memory consumption was 124.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3484.4ms, OverallIterations: 7, TraceHistogramMax: 7, EmptinessCheckTime: 15.5ms, AutomataDifference: 856.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 494.7ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 192 SDtfs, 83 SDslu, 605 SDs, 0 SdLazy, 505 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 418.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 412.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 37 PreInvPairs, 51 NumberOfFragments, 263 HoareAnnotationTreeSize, 37 FomulaSimplifications, 508 FormulaSimplificationTreeSizeReduction, 81.7ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 701 FormulaSimplificationTreeSizeReductionInter, 404.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 87.7ms SsaConstructionTime, 138.1ms SatisfiabilityAnalysisTime, 958.5ms InterpolantComputationTime, 224 NumberOfCodeBlocks, 207 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 217 ConstructedInterpolants, 0 QuantifiedInterpolants, 672 SizeOfPredicates, 14 NumberOfNonLiveVariables, 661 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 167/192 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((0 <= n && s == t + 1) && a == 1) && s == 4) && n <= 1) || ((((0 <= n && n <= 1) && a == 0) && a * 2 + 1 == t) && s == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...