/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/geo3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:25:07,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:25:07,345 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:25:07,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 15:25:07,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 15:25:07,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 15:25:07,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 15:25:07,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 15:25:07,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 15:25:07,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 15:25:07,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 15:25:07,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 15:25:07,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:25:07,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:25:07,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:25:07,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:25:07,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:25:07,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:25:07,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:25:07,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:25:07,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:25:07,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:25:07,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:25:07,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:25:07,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 15:25:07,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 15:25:07,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 15:25:07,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 15:25:07,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 15:25:07,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 15:25:07,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 15:25:07,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 15:25:07,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 15:25:07,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 15:25:07,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 15:25:07,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 15:25:07,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 15:25:07,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 15:25:07,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:25:07,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:25:07,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:25:07,432 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 15:25:07,467 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:25:07,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:25:07,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:25:07,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:25:07,470 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:25:07,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:25:07,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:25:07,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:25:07,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:25:07,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:25:07,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:25:07,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:25:07,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:25:07,473 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:25:07,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:25:07,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:25:07,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:25:07,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:25:07,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:25:07,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:25:07,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:07,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:25:07,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:25:07,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:25:07,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:25:07,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:25:07,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:25:07,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:25:07,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:25:07,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:25:07,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:25:07,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:25:07,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:25:07,850 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:25:07,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2021-05-02 15:25:07,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/770a66a8f/89b7c47759884c09b7c5c873f16da79b/FLAG4fcb1d4a5 [2021-05-02 15:25:08,341 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:25:08,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_valuebound50.c [2021-05-02 15:25:08,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/770a66a8f/89b7c47759884c09b7c5c873f16da79b/FLAG4fcb1d4a5 [2021-05-02 15:25:08,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/770a66a8f/89b7c47759884c09b7c5c873f16da79b [2021-05-02 15:25:08,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:25:08,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:25:08,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:08,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:25:08,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:25:08,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31306d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08, skipping insertion in model container [2021-05-02 15:25:08,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:25:08,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:25:08,579 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/geo3-ll_valuebound50.c[525,538] [2021-05-02 15:25:08,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:08,602 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:25:08,613 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/geo3-ll_valuebound50.c[525,538] [2021-05-02 15:25:08,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:08,642 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:25:08,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08 WrapperNode [2021-05-02 15:25:08,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:08,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:25:08,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:25:08,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:25:08,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (1/1) ... [2021-05-02 15:25:08,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:25:08,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:25:08,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:25:08,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:25:08,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (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 15:25:08,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:25:08,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:25:08,755 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:25:08,755 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:25:08,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:25:08,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:25:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:25:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:25:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:25:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:25:08,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:25:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:25:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:25:08,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:25:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:25:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:25:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:25:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:25:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:25:08,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:25:09,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:25:09,035 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:25:09,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:09 BoogieIcfgContainer [2021-05-02 15:25:09,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:25:09,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:25:09,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:25:09,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:25:09,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:25:08" (1/3) ... [2021-05-02 15:25:09,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322d07d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:09, skipping insertion in model container [2021-05-02 15:25:09,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:08" (2/3) ... [2021-05-02 15:25:09,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322d07d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:09, skipping insertion in model container [2021-05-02 15:25:09,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:09" (3/3) ... [2021-05-02 15:25:09,053 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_valuebound50.c [2021-05-02 15:25:09,058 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:25:09,061 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:25:09,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:25:09,102 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:25:09,103 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:25:09,103 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:25:09,103 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:25:09,103 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:25:09,103 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:25:09,103 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:25:09,103 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:25:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:25:09,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:25:09,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:09,121 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:09,122 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:09,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -779299010, now seen corresponding path program 1 times [2021-05-02 15:25:09,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:09,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415396775] [2021-05-02 15:25:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:09,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:09,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:09,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:25:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:09,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 15:25:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:09,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:09,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415396775] [2021-05-02 15:25:09,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415396775] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:09,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:09,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:25:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646370879] [2021-05-02 15:25:09,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:25:09,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:09,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:25:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:09,358 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:25:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:09,432 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2021-05-02 15:25:09,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:25:09,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:25:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:09,439 INFO L225 Difference]: With dead ends: 55 [2021-05-02 15:25:09,439 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 15:25:09,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 15:25:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 15:25:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:25:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 15:25:09,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 29 [2021-05-02 15:25:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:09,475 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 15:25:09,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:25:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 15:25:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:25:09,476 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:09,477 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:09,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:25:09,477 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:09,478 INFO L82 PathProgramCache]: Analyzing trace with hash -963850242, now seen corresponding path program 1 times [2021-05-02 15:25:09,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:09,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606594167] [2021-05-02 15:25:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:09,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:09,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638711765] [2021-05-02 15:25:09,500 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 15:25:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:09,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:09,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:09,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:09,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:09,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:09,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:25:09,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606594167] [2021-05-02 15:25:09,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638711765] [2021-05-02 15:25:09,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638711765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:09,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:09,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:25:09,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480721563] [2021-05-02 15:25:09,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:25:09,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:25:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:09,815 INFO L87 Difference]: Start difference. First operand 26 states and 29 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:25:09,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:09,913 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 15:25:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:09,913 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:25:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:09,914 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:25:09,914 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:25:09,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:25:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:25:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:25:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 15:25:09,923 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-02 15:25:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:09,924 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 15:25:09,925 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:25:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 15:25:09,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:09,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:09,926 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:10,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:25:10,141 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:10,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:10,142 INFO L82 PathProgramCache]: Analyzing trace with hash -425626518, now seen corresponding path program 1 times [2021-05-02 15:25:10,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:10,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297303155] [2021-05-02 15:25:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:10,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:10,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808617626] [2021-05-02 15:25:10,155 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 15:25:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:10,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 15:25:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:10,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 15:25:10,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:10,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297303155] [2021-05-02 15:25:10,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:10,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808617626] [2021-05-02 15:25:10,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808617626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:10,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:10,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:10,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476938005] [2021-05-02 15:25:10,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:10,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:10,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:10,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:10,491 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:10,646 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-02 15:25:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:25:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:10,648 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:25:10,648 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 15:25:10,649 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 15:25:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 15:25:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:25:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-05-02 15:25:10,658 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2021-05-02 15:25:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:10,659 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-05-02 15:25:10,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-05-02 15:25:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 15:25:10,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:10,660 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:10,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:10,877 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1540046462, now seen corresponding path program 2 times [2021-05-02 15:25:10,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:10,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348581626] [2021-05-02 15:25:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:10,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:10,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138233898] [2021-05-02 15:25:10,899 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 15:25:10,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:25:10,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:10,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:25:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:11,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 15:25:11,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:11,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348581626] [2021-05-02 15:25:11,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:11,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138233898] [2021-05-02 15:25:11,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138233898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:11,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:11,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:11,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353461630] [2021-05-02 15:25:11,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:11,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:11,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:11,321 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:25:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:18,195 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 15:25:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:18,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2021-05-02 15:25:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:18,197 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:25:18,197 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:25:18,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:25:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 15:25:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 31 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-05-02 15:25:18,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 43 [2021-05-02 15:25:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:18,207 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-05-02 15:25:18,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 15:25:18,207 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-05-02 15:25:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:25:18,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:18,208 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:18,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:18,425 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:18,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1558711885, now seen corresponding path program 1 times [2021-05-02 15:25:18,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:18,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326064109] [2021-05-02 15:25:18,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:18,458 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:18,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964911739] [2021-05-02 15:25:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:25:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:25:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:18,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 15:25:18,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:18,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326064109] [2021-05-02 15:25:18,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:18,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964911739] [2021-05-02 15:25:18,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964911739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:18,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:18,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:25:18,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78014160] [2021-05-02 15:25:18,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:18,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:18,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:18,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:18,656 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:20,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:20,769 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 15:25:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:20,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 49 [2021-05-02 15:25:20,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:20,772 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:20,772 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:25:20,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:25:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 15:25:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-05-02 15:25:20,790 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 49 [2021-05-02 15:25:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:20,790 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-05-02 15:25:20,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-05-02 15:25:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 15:25:20,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:20,791 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:20,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:20,992 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1099019754, now seen corresponding path program 3 times [2021-05-02 15:25:20,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:20,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038847946] [2021-05-02 15:25:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:21,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:21,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821032551] [2021-05-02 15:25:21,005 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 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 15:25:21,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:25:21,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:21,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:25:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:21,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:21,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:23,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:23,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:23,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:23,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:23,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:23,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:25:23,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:23,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038847946] [2021-05-02 15:25:23,576 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:23,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821032551] [2021-05-02 15:25:23,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821032551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:23,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:23,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:25:23,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654460890] [2021-05-02 15:25:23,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:23,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:23,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:23,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:23,579 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:30,349 WARN L205 SmtUtils]: Spent 4.65 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:25:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:32,376 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-05-02 15:25:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2021-05-02 15:25:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:32,378 INFO L225 Difference]: With dead ends: 45 [2021-05-02 15:25:32,378 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:25:32,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4710.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:25:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:25:32,379 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 15:25:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:25:32,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2021-05-02 15:25:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:32,379 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:25:32,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 15:25:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:25:32,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:25:32,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:25:32,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:26:00,366 WARN L205 SmtUtils]: Spent 27.64 s on a formula simplification. DAG size of input: 46 DAG size of output: 22 [2021-05-02 15:26:02,753 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-05-02 15:26:05,279 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2021-05-02 15:26:05,281 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:26:05,281 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:26:05,281 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:26:05,281 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:26:05,282 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 15:26:05,282 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:26:05,282 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:26:05,282 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:26:05,282 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:26:05,282 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:26:05,282 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 15:26:05,282 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:26:05,282 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:26:05,282 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:26:05,282 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~z~0) (<= main_~z~0 50)) [2021-05-02 15:26:05,282 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 15:26:05,282 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~z~0) (<= main_~z~0 50)) [2021-05-02 15:26:05,283 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 15:26:05,283 INFO L201 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-05-02 15:26:05,283 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 48) no Hoare annotation was computed. [2021-05-02 15:26:05,283 INFO L198 CegarLoopUtils]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-05-02 15:26:05,283 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 15:26:05,283 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 48) no Hoare annotation was computed. [2021-05-02 15:26:05,283 INFO L194 CegarLoopUtils]: At program point L36-2(lines 36 45) the Hoare annotation is: (let ((.cse3 (= main_~a~0 main_~x~0)) (.cse4 (<= 0 main_~z~0)) (.cse5 (<= main_~z~0 50))) (or (and (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (not .cse2) (= (mod main_~y~0 main_~z~0) 0))) (and .cse3 .cse2))) .cse4 .cse5) (and .cse3 (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0))) (= main_~y~0 1) .cse4 .cse5))) [2021-05-02 15:26:05,283 INFO L194 CegarLoopUtils]: At program point L36-3(lines 36 45) the Hoare annotation is: (let ((.cse1 (<= 0 main_~z~0)) (.cse2 (<= main_~z~0 50))) (or (let ((.cse0 (* main_~z~0 main_~a~0))) (and (= .cse0 main_~az~0) (= main_~x~0 (+ .cse0 main_~a~0)) .cse1 .cse2 (= main_~z~0 main_~y~0))) (and (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0))) .cse1 .cse2))) [2021-05-02 15:26:05,283 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 48) the Hoare annotation is: true [2021-05-02 15:26:05,284 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse3 (= main_~a~0 main_~x~0)) (.cse4 (<= 0 main_~z~0)) (.cse5 (<= main_~z~0 50))) (or (and (let ((.cse2 (= main_~z~0 0))) (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (not .cse2) (= (mod main_~y~0 main_~z~0) 0))) (and .cse3 .cse2))) .cse4 .cse5) (and .cse3 (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0))) (= main_~y~0 1) .cse4 .cse5))) [2021-05-02 15:26:05,284 INFO L198 CegarLoopUtils]: For program point L37-1(lines 36 45) no Hoare annotation was computed. [2021-05-02 15:26:05,284 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:26:05,284 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:26:05,284 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:26:05,284 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:26:05,284 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:26:05,284 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:26:05,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:26:05 BoogieIcfgContainer [2021-05-02 15:26:05,296 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:26:05,297 INFO L168 Benchmark]: Toolchain (without parser) took 56927.38 ms. Allocated memory was 196.1 MB in the beginning and 266.3 MB in the end (delta: 70.3 MB). Free memory was 159.7 MB in the beginning and 149.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 81.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:26:05,297 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 176.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:26:05,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.81 ms. Allocated memory is still 196.1 MB. Free memory was 159.4 MB in the beginning and 174.5 MB in the end (delta: -15.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:26:05,297 INFO L168 Benchmark]: Boogie Preprocessor took 38.77 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 173.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:26:05,297 INFO L168 Benchmark]: RCFGBuilder took 357.62 ms. Allocated memory is still 196.1 MB. Free memory was 173.1 MB in the beginning and 158.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:26:05,297 INFO L168 Benchmark]: TraceAbstraction took 56254.12 ms. Allocated memory was 196.1 MB in the beginning and 266.3 MB in the end (delta: 70.3 MB). Free memory was 157.9 MB in the beginning and 149.1 MB in the end (delta: 8.7 MB). Peak memory consumption was 79.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:26:05,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 196.1 MB. Free memory is still 176.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.81 ms. Allocated memory is still 196.1 MB. Free memory was 159.4 MB in the beginning and 174.5 MB in the end (delta: -15.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.77 ms. Allocated memory is still 196.1 MB. Free memory was 174.5 MB in the beginning and 173.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 357.62 ms. Allocated memory is still 196.1 MB. Free memory was 173.1 MB in the beginning and 158.1 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 56254.12 ms. Allocated memory was 196.1 MB in the beginning and 266.3 MB in the end (delta: 70.3 MB). Free memory was 157.9 MB in the beginning and 149.1 MB in the end (delta: 8.7 MB). Peak memory consumption was 79.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 23480.0ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 12.7ms, AutomataDifference: 18150.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 32700.4ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 140 SDtfs, 92 SDslu, 539 SDs, 0 SdLazy, 383 SolverSat, 31 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13044.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 227 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5139.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 24 PreInvPairs, 37 NumberOfFragments, 260 HoareAnnotationTreeSize, 24 FomulaSimplifications, 60 FormulaSimplificationTreeSizeReduction, 113.6ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 953 FormulaSimplificationTreeSizeReductionInter, 32577.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 81.7ms SsaConstructionTime, 188.5ms SatisfiabilityAnalysisTime, 3535.7ms InterpolantComputationTime, 236 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 230 ConstructedInterpolants, 0 QuantifiedInterpolants, 845 SizeOfPredicates, 14 NumberOfNonLiveVariables, 749 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 120/151 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: 36]: Loop Invariant Derived loop invariant: ((((((z * ((x + a * -1) / z) + a == az * (y / z) + (x + a * -1) / z && (x + a * -1) % z == 0) && !(z == 0)) && y % z == 0) || (a == x && z == 0)) && 0 <= z) && z <= 50) || ((((a == x && x + y * az == a + x * z) && y == 1) && 0 <= z) && z <= 50) RESULT: Ultimate proved your program to be correct! Received shutdown request...