/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/fermat2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:15:08,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:15:08,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:15:08,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 15:15:08,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 15:15:08,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 15:15:08,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 15:15:08,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 15:15:08,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 15:15:08,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 15:15:08,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 15:15:08,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 15:15:08,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:15:08,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:15:08,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:15:08,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:15:08,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:15:08,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:15:08,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:15:08,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:15:08,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:15:08,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:15:08,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:15:08,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:15:08,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 15:15:08,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 15:15:08,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 15:15:08,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 15:15:08,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 15:15:08,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 15:15:08,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 15:15:08,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 15:15:08,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 15:15:08,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 15:15:08,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 15:15:08,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 15:15:08,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 15:15:08,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 15:15:08,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:15:08,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:15:08,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:15:08,147 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 15:15:08,175 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:15:08,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:15:08,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:15:08,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:15:08,178 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:15:08,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:15:08,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:15:08,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:15:08,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:15:08,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:15:08,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:15:08,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:15:08,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:15:08,179 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:15:08,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:15:08,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:15:08,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:15:08,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:15:08,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:15:08,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:15:08,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:15:08,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:15:08,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:15:08,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:15:08,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:15:08,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:15:08,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:15:08,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:15:08,181 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:15:08,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:15:08,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:15:08,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:15:08,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:15:08,556 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:15:08,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c [2021-05-02 15:15:08,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42bc3bce1/e65dbd3bd21c436f81e8d568632e93f0/FLAGa64e76395 [2021-05-02 15:15:08,979 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:15:08,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound10.c [2021-05-02 15:15:08,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42bc3bce1/e65dbd3bd21c436f81e8d568632e93f0/FLAGa64e76395 [2021-05-02 15:15:09,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42bc3bce1/e65dbd3bd21c436f81e8d568632e93f0 [2021-05-02 15:15:09,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:15:09,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:15:09,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:15:09,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:15:09,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:15:09,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553a0544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09, skipping insertion in model container [2021-05-02 15:15:09,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:15:09,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:15:09,143 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/fermat2-ll_valuebound10.c[524,537] [2021-05-02 15:15:09,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:15:09,166 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:15:09,175 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/fermat2-ll_valuebound10.c[524,537] [2021-05-02 15:15:09,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:15:09,224 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:15:09,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09 WrapperNode [2021-05-02 15:15:09,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:15:09,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:15:09,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:15:09,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:15:09,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (1/1) ... [2021-05-02 15:15:09,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:15:09,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:15:09,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:15:09,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:15:09,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (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 15:15:09,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:15:09,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:15:09,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:15:09,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:15:09,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:15:09,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:15:09,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:15:09,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:15:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:15:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:15:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:15:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:15:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:15:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:15:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:15:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:15:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:15:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:15:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:15:09,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:15:09,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:15:09,559 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:15:09,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:15:09 BoogieIcfgContainer [2021-05-02 15:15:09,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:15:09,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:15:09,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:15:09,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:15:09,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:15:09" (1/3) ... [2021-05-02 15:15:09,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38997964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:15:09, skipping insertion in model container [2021-05-02 15:15:09,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:15:09" (2/3) ... [2021-05-02 15:15:09,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38997964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:15:09, skipping insertion in model container [2021-05-02 15:15:09,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:15:09" (3/3) ... [2021-05-02 15:15:09,564 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound10.c [2021-05-02 15:15:09,567 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:15:09,569 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:15:09,580 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:15:09,594 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:15:09,595 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:15:09,595 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:15:09,595 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:15:09,595 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:15:09,595 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:15:09,595 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:15:09,595 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:15:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:15:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:15:09,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:09,625 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:15:09,625 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times [2021-05-02 15:15:09,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:09,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331268933] [2021-05-02 15:15:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:09,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:15:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:09,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:15:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:09,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:15:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:09,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:15:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:09,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:15:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:15:09,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:15:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331268933] [2021-05-02 15:15:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331268933] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:15:09,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:15:09,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:15:09,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097390685] [2021-05-02 15:15:09,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:15:09,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:15:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:15:09,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:15:09,826 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:15:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:09,899 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-05-02 15:15:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:15:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:15:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:09,904 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:15:09,905 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:15:09,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:15:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:15:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:15:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:15:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 15:15:09,930 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 15:15:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:09,931 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 15:15:09,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:15:09,931 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 15:15:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:15:09,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:09,932 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:15:09,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:15:09,932 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times [2021-05-02 15:15:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:09,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718401072] [2021-05-02 15:15:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:09,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:09,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944849439] [2021-05-02 15:15:09,947 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 15:15:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:10,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:15:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:10,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:15:10,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:15:10,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718401072] [2021-05-02 15:15:10,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:15:10,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944849439] [2021-05-02 15:15:10,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944849439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:15:10,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:15:10,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:15:10,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483627409] [2021-05-02 15:15:10,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:15:10,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:15:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:15:10,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:15:10,327 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:15:10,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:10,464 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-05-02 15:15:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:15:10,465 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:15:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:10,466 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:15:10,466 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:15:10,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:15:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:15:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 15:15:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:15:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 15:15:10,476 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 15:15:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:10,477 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 15:15:10,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:15:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 15:15:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:15:10,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:10,479 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:15:10,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:15:10,696 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:10,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash -453872510, now seen corresponding path program 1 times [2021-05-02 15:15:10,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:10,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645457685] [2021-05-02 15:15:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:10,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:10,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476685692] [2021-05-02 15:15:10,708 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 15:15:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:10,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:15:10,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:10,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:15:10,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:15:10,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645457685] [2021-05-02 15:15:10,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:15:10,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476685692] [2021-05-02 15:15:10,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476685692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:15:10,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:15:10,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:15:10,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983054599] [2021-05-02 15:15:10,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:15:10,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:15:10,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:15:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:15:10,893 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:15:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:17,977 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-02 15:15:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:15:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 15:15:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:17,978 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:15:17,978 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:15:17,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:15:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:15:17,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 15:15:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:15:17,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 15:15:17,986 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 39 [2021-05-02 15:15:17,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:17,986 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 15:15:17,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:15:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 15:15:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:15:17,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:17,987 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:15:18,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:15:18,202 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1657118275, now seen corresponding path program 1 times [2021-05-02 15:15:18,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:18,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921727568] [2021-05-02 15:15:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:18,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:18,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542484355] [2021-05-02 15:15:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:15:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:18,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:15:18,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:18,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:15:18,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:15:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921727568] [2021-05-02 15:15:18,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:15:18,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542484355] [2021-05-02 15:15:18,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542484355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:15:18,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:15:18,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:15:18,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116728427] [2021-05-02 15:15:18,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:15:18,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:15:18,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:15:18,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:15:18,477 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:15:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:21,596 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-05-02 15:15:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:15:21,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 15:15:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:21,598 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:15:21,598 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:15:21,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:15:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:15:21,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 15:15:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:15:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 15:15:21,606 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 41 [2021-05-02 15:15:21,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:21,606 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 15:15:21,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:15:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 15:15:21,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:15:21,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:21,607 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 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 15:15:21,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:15:21,824 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:21,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1974186685, now seen corresponding path program 2 times [2021-05-02 15:15:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:21,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087391566] [2021-05-02 15:15:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:21,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:21,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374016712] [2021-05-02 15:15:21,854 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 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 15:15:21,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:15:21,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:15:21,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:15:21,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:21,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:21,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:21,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:21,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:21,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:21,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:22,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:22,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:22,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:22,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:22,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:22,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:15:22,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:15:22,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087391566] [2021-05-02 15:15:22,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:15:22,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374016712] [2021-05-02 15:15:22,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374016712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:15:22,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:15:22,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:15:22,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111172919] [2021-05-02 15:15:22,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:15:22,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:15:22,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:15:22,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:15:22,190 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:15:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:25,350 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-02 15:15:25,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:15:25,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 15:15:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:25,351 INFO L225 Difference]: With dead ends: 58 [2021-05-02 15:15:25,351 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:15:25,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:15:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:15:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 15:15:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:15:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 15:15:25,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 15:15:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:25,358 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 15:15:25,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:15:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 15:15:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 15:15:25,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:25,359 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:15:25,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:15:25,577 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -197393475, now seen corresponding path program 3 times [2021-05-02 15:15:25,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:25,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879370626] [2021-05-02 15:15:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:25,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:25,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657304993] [2021-05-02 15:15:25,587 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 15:15:25,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:15:25,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:15:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:15:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:25,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 15:15:25,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:15:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879370626] [2021-05-02 15:15:25,804 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:15:25,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657304993] [2021-05-02 15:15:25,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657304993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:15:25,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:15:25,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:15:25,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157743529] [2021-05-02 15:15:25,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:15:25,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:15:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:15:25,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:15:25,806 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:15:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:15:31,776 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-05-02 15:15:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:15:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 15:15:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:15:31,779 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:15:31,779 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 15:15:31,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:15:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 15:15:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 15:15:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:15:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 15:15:31,796 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 15:15:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:15:31,797 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 15:15:31,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:15:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 15:15:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 15:15:31,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:15:31,798 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:15:32,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:15:32,012 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:15:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:15:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1923807749, now seen corresponding path program 1 times [2021-05-02 15:15:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:15:32,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321438779] [2021-05-02 15:15:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:15:32,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:15:32,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369464586] [2021-05-02 15:15:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:15:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:15:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 15:15:32,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:15:32,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:32,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:32,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:32,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:32,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:32,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:32,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:15:32,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:07,690 WARN L205 SmtUtils]: Spent 33.32 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 15:16:11,813 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:16:11,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:11,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:11,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,927 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 15:16:21,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:21,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:16:54,272 WARN L205 SmtUtils]: Spent 29.89 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:17:11,743 WARN L205 SmtUtils]: Spent 7.09 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:17:11,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:11,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 41 refuted. 4 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 15:17:11,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321438779] [2021-05-02 15:17:11,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369464586] [2021-05-02 15:17:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369464586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:11,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:11,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:17:11,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423501938] [2021-05-02 15:17:11,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:17:11,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:11,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:17:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=162, Unknown=9, NotChecked=0, Total=210 [2021-05-02 15:17:11,788 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:18:46,254 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 15:19:13,039 WARN L205 SmtUtils]: Spent 26.73 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 15:19:32,480 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 15:20:32,049 WARN L205 SmtUtils]: Spent 6.12 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 15:20:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:34,091 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2021-05-02 15:20:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:20:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2021-05-02 15:20:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:34,104 INFO L225 Difference]: With dead ends: 98 [2021-05-02 15:20:34,104 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 15:20:34,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 152522.7ms TimeCoverageRelationStatistics Valid=84, Invalid=364, Unknown=14, NotChecked=0, Total=462 [2021-05-02 15:20:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 15:20:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-05-02 15:20:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 54 states have internal predecessors, (58), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 15:20:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2021-05-02 15:20:34,115 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 65 [2021-05-02 15:20:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:34,115 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2021-05-02 15:20:34,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:20:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2021-05-02 15:20:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:20:34,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:34,116 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:34,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:34,339 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1860102713, now seen corresponding path program 2 times [2021-05-02 15:20:34,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:34,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748943034] [2021-05-02 15:20:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:34,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:34,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329079844] [2021-05-02 15:20:34,357 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:34,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:20:34,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:20:34,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 15:20:34,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:34,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 15:20:34,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:34,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748943034] [2021-05-02 15:20:34,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:34,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329079844] [2021-05-02 15:20:34,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329079844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:34,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:34,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:20:34,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575957526] [2021-05-02 15:20:34,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:20:34,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:34,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:20:34,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:20:34,720 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 15:20:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:35,071 INFO L93 Difference]: Finished difference Result 152 states and 182 transitions. [2021-05-02 15:20:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:20:35,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2021-05-02 15:20:35,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:35,073 INFO L225 Difference]: With dead ends: 152 [2021-05-02 15:20:35,073 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 15:20:35,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:20:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 15:20:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-02 15:20:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 15:20:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-05-02 15:20:35,089 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 73 [2021-05-02 15:20:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:35,089 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-05-02 15:20:35,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 15:20:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-05-02 15:20:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:20:35,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:20:35,095 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:20:35,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:35,316 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:20:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:20:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1204892615, now seen corresponding path program 3 times [2021-05-02 15:20:35,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:20:35,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237158947] [2021-05-02 15:20:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:20:35,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:20:35,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109167831] [2021-05-02 15:20:35,327 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:20:35,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:20:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:20:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:20:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:20:35,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:20:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 15:20:35,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:20:35,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237158947] [2021-05-02 15:20:35,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:20:35,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109167831] [2021-05-02 15:20:35,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109167831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:20:35,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:20:35,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:20:35,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346159643] [2021-05-02 15:20:35,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:20:35,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:20:35,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:20:35,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:20:35,706 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:20:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:20:39,850 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-05-02 15:20:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:20:39,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 15:20:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:20:39,852 INFO L225 Difference]: With dead ends: 114 [2021-05-02 15:20:39,852 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:20:39,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:20:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:20:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:20:39,853 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 15:20:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:20:39,853 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 15:20:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:20:39,853 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:20:39,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:20:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:20:39,853 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:20:40,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:20:40,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:21:36,098 WARN L205 SmtUtils]: Spent 55.76 s on a formula simplification. DAG size of input: 100 DAG size of output: 29 [2021-05-02 15:22:12,655 WARN L205 SmtUtils]: Spent 36.56 s on a formula simplification. DAG size of input: 100 DAG size of output: 29 [2021-05-02 15:22:12,687 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 15:22:12,688 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 15:22:12,688 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 15:22:12,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:22:12,688 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 15:22:12,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:22:12,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:22:12,688 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:22:12,688 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:22:12,688 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:22:12,688 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 15:22:12,689 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 15:22:12,689 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 15:22:12,689 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 15:22:12,689 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 46) the Hoare annotation is: (let ((.cse1 (* main_~v~0 main_~v~0)) (.cse2 (* main_~A~0 4)) (.cse3 (* main_~u~0 2)) (.cse0 (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)))) (and (= .cse0 (+ .cse1 .cse2 (* main_~r~0 4) .cse3)) (= (+ .cse1 .cse2 .cse3) .cse0) (<= 0 main_~A~0) (<= main_~A~0 10))) [2021-05-02 15:22:12,689 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-02 15:22:12,689 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (<= main_~A~0 10)) [2021-05-02 15:22:12,689 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 10)) [2021-05-02 15:22:12,689 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 51) no Hoare annotation was computed. [2021-05-02 15:22:12,689 INFO L194 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 10)) [2021-05-02 15:22:12,689 INFO L201 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-05-02 15:22:12,689 INFO L198 CegarLoopUtils]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-05-02 15:22:12,689 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 51) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (<= 0 main_~A~0) (= (mod main_~A~0 2) 1) (<= main_~A~0 10)) [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 46) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 51) the Hoare annotation is: true [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point L49(line 49) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point L39(lines 39 45) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L194 CegarLoopUtils]: At program point L39-2(lines 35 46) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (<= 0 main_~A~0) (= (mod main_~A~0 2) 1) (<= main_~A~0 10)) [2021-05-02 15:22:12,690 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 15:22:12,690 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 15:22:12,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:22:12 BoogieIcfgContainer [2021-05-02 15:22:12,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:22:12,700 INFO L168 Benchmark]: Toolchain (without parser) took 423696.40 ms. Allocated memory was 187.7 MB in the beginning and 248.5 MB in the end (delta: 60.8 MB). Free memory was 151.7 MB in the beginning and 208.0 MB in the end (delta: -56.4 MB). Peak memory consumption was 128.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:12,700 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 187.7 MB. Free memory is still 168.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:22:12,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.97 ms. Allocated memory is still 187.7 MB. Free memory was 151.5 MB in the beginning and 171.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:12,700 INFO L168 Benchmark]: Boogie Preprocessor took 44.92 ms. Allocated memory is still 187.7 MB. Free memory was 171.4 MB in the beginning and 169.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:12,700 INFO L168 Benchmark]: RCFGBuilder took 288.26 ms. Allocated memory is still 187.7 MB. Free memory was 169.8 MB in the beginning and 155.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:12,701 INFO L168 Benchmark]: TraceAbstraction took 423139.05 ms. Allocated memory was 187.7 MB in the beginning and 248.5 MB in the end (delta: 60.8 MB). Free memory was 154.8 MB in the beginning and 208.0 MB in the end (delta: -53.2 MB). Peak memory consumption was 132.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:22:12,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 187.7 MB. Free memory is still 168.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.97 ms. Allocated memory is still 187.7 MB. Free memory was 151.5 MB in the beginning and 171.4 MB in the end (delta: -20.0 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.92 ms. Allocated memory is still 187.7 MB. Free memory was 171.4 MB in the beginning and 169.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.26 ms. Allocated memory is still 187.7 MB. Free memory was 169.8 MB in the beginning and 155.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 423139.05 ms. Allocated memory was 187.7 MB in the beginning and 248.5 MB in the end (delta: 60.8 MB). Free memory was 154.8 MB in the beginning and 208.0 MB in the end (delta: -53.2 MB). Peak memory consumption was 132.2 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, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 330471.6ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 30.4ms, AutomataDifference: 226400.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 92622.3ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 224 SDtfs, 158 SDslu, 1140 SDs, 0 SdLazy, 1258 SolverSat, 86 SolverUnsat, 50 SolverUnknown, 0 SolverNotchecked, 172269.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 153288.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=8, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 87.2ms AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 13 LocationsWithAnnotation, 45 PreInvPairs, 81 NumberOfFragments, 200 HoareAnnotationTreeSize, 45 FomulaSimplifications, 9820 FormulaSimplificationTreeSizeReduction, 176.9ms HoareSimplificationTime, 13 FomulaSimplificationsInter, 2071 FormulaSimplificationTreeSizeReductionInter, 92434.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 75.7ms SsaConstructionTime, 307.0ms SatisfiabilityAnalysisTime, 101313.9ms InterpolantComputationTime, 463 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 2713 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 396/538 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: 35]: Loop Invariant Derived loop invariant: (((R * R + 1 < A + 2 * R && u * u + v * 2 == v * v + A * 4 + r * 4 + u * 2) && 0 <= A) && A % 2 == 1) && A <= 10 RESULT: Ultimate proved your program to be correct! Received shutdown request...