/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/ps2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:39:20,193 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:39:20,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:39:20,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 16:39:20,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 16:39:20,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 16:39:20,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 16:39:20,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 16:39:20,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 16:39:20,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 16:39:20,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 16:39:20,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 16:39:20,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:39:20,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:39:20,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:39:20,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:39:20,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:39:20,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:39:20,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:39:20,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:39:20,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:39:20,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:39:20,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:39:20,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:39:20,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 16:39:20,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 16:39:20,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 16:39:20,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 16:39:20,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 16:39:20,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 16:39:20,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 16:39:20,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 16:39:20,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 16:39:20,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 16:39:20,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 16:39:20,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 16:39:20,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 16:39:20,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 16:39:20,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:39:20,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:39:20,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:39:20,295 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 16:39:20,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:39:20,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:39:20,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:39:20,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:39:20,339 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:39:20,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:39:20,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:39:20,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:39:20,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:39:20,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:39:20,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:39:20,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:39:20,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:39:20,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:39:20,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:39:20,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:39:20,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:39:20,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:39:20,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:39:20,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:39:20,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:39:20,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:39:20,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:39:20,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:39:20,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:39:20,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:39:20,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:39:20,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:39:20,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:39:20,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:39:20,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:39:20,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:39:20,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:39:20,657 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:39:20,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound1.c [2021-05-02 16:39:20,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222b11b24/cdf3abb0ea0a4d2abf93a2713b2def5d/FLAG280ba0c36 [2021-05-02 16:39:21,188 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:39:21,188 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound1.c [2021-05-02 16:39:21,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222b11b24/cdf3abb0ea0a4d2abf93a2713b2def5d/FLAG280ba0c36 [2021-05-02 16:39:21,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/222b11b24/cdf3abb0ea0a4d2abf93a2713b2def5d [2021-05-02 16:39:21,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:39:21,694 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:39:21,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:39:21,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:39:21,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:39:21,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f636474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21, skipping insertion in model container [2021-05-02 16:39:21,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:39:21,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:39:21,818 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/ps2-ll_valuebound1.c[454,467] [2021-05-02 16:39:21,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:39:21,834 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:39:21,857 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/ps2-ll_valuebound1.c[454,467] [2021-05-02 16:39:21,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:39:21,885 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:39:21,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21 WrapperNode [2021-05-02 16:39:21,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:39:21,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:39:21,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:39:21,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:39:21,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (1/1) ... [2021-05-02 16:39:21,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:39:21,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:39:21,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:39:21,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:39:21,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (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 16:39:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:39:21,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:39:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:39:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:39:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:39:21,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:39:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:39:21,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:39:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:39:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:39:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:39:21,970 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:39:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:39:21,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:39:21,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:39:21,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:39:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:39:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:39:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:39:21,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:39:22,161 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:39:22,162 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:39:22,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:39:22 BoogieIcfgContainer [2021-05-02 16:39:22,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:39:22,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:39:22,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:39:22,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:39:22,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:39:21" (1/3) ... [2021-05-02 16:39:22,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607efdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:39:22, skipping insertion in model container [2021-05-02 16:39:22,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:21" (2/3) ... [2021-05-02 16:39:22,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@607efdc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:39:22, skipping insertion in model container [2021-05-02 16:39:22,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:39:22" (3/3) ... [2021-05-02 16:39:22,169 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound1.c [2021-05-02 16:39:22,173 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:39:22,176 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:39:22,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:39:22,219 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:39:22,220 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:39:22,220 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:39:22,220 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:39:22,220 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:39:22,220 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:39:22,220 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:39:22,220 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:39:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:39:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:39:22,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:22,275 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:22,275 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1914087080, now seen corresponding path program 1 times [2021-05-02 16:39:22,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:22,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125300318] [2021-05-02 16:39:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:22,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:39:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:22,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:39:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:39:22,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125300318] [2021-05-02 16:39:22,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125300318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:39:22,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:39:22,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:39:22,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986294066] [2021-05-02 16:39:22,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:39:22,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:22,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:39:22,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:39:22,568 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:39:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:22,652 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 16:39:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:39:22,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:39:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:22,662 INFO L225 Difference]: With dead ends: 45 [2021-05-02 16:39:22,662 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 16:39:22,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:39:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 16:39:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 16:39:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:39:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 16:39:22,708 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-02 16:39:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:22,708 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 16:39:22,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:39:22,709 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 16:39:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:39:22,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:22,710 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:22,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:39:22,711 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1699034386, now seen corresponding path program 1 times [2021-05-02 16:39:22,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:22,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98530657] [2021-05-02 16:39:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:22,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:22,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102468280] [2021-05-02 16:39:22,748 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 16:39:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:22,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:39:22,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:22,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:39:22,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98530657] [2021-05-02 16:39:22,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102468280] [2021-05-02 16:39:22,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102468280] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:39:22,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:39:22,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:39:22,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846468505] [2021-05-02 16:39:22,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:39:22,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:39:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:39:22,938 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:39:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:22,988 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-05-02 16:39:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:39:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:39:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:22,990 INFO L225 Difference]: With dead ends: 32 [2021-05-02 16:39:22,990 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 16:39:22,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:39:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 16:39:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 16:39:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:39:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 16:39:22,998 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-02 16:39:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:22,999 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 16:39:22,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:39:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 16:39:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 16:39:23,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:23,000 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:23,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:39:23,213 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash 276758134, now seen corresponding path program 1 times [2021-05-02 16:39:23,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:23,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193403737] [2021-05-02 16:39:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:23,229 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:23,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33693000] [2021-05-02 16:39:23,230 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 16:39:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:39:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:39:23,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193403737] [2021-05-02 16:39:23,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33693000] [2021-05-02 16:39:23,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33693000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:39:23,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:39:23,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:39:23,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410479477] [2021-05-02 16:39:23,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:39:23,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:39:23,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:39:23,421 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:39:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:23,519 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-05-02 16:39:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:39:23,520 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 16:39:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:23,522 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:39:23,522 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 16:39:23,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:39:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 16:39:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 16:39:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:39:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-02 16:39:23,539 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-02 16:39:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:23,540 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-02 16:39:23,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:39:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-02 16:39:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 16:39:23,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:23,541 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:23,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:23,757 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1640710638, now seen corresponding path program 2 times [2021-05-02 16:39:23,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:23,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042536767] [2021-05-02 16:39:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:23,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:23,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511960106] [2021-05-02 16:39:23,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:23,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:39:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:39:23,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 16:39:23,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:39:23,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:23,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042536767] [2021-05-02 16:39:23,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:23,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511960106] [2021-05-02 16:39:23,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511960106] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:39:23,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:39:23,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:39:23,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633877050] [2021-05-02 16:39:23,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:39:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:39:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:39:23,980 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:39:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:24,015 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-02 16:39:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:39:24,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 16:39:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:24,016 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:39:24,017 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 16:39:24,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:39:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 16:39:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 16:39:24,017 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 16:39:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 16:39:24,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-02 16:39:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:24,018 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 16:39:24,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:39:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 16:39:24,018 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 16:39:24,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:24,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 16:39:24,531 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 16:39:24,531 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 16:39:24,531 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 16:39:24,532 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:39:24,532 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 16:39:24,532 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:39:24,532 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:39:24,532 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 16:39:24,532 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 16:39:24,533 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:39:24,533 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-02 16:39:24,533 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 16:39:24,533 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:39:24,533 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:39:24,533 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2021-05-02 16:39:24,533 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1)) (.cse1 (<= 0 main_~k~0))) (or (and .cse0 .cse1 (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)) (and (<= 1 main_~c~0) .cse0 .cse1 (= main_~y~0 1) (= main_~y~0 main_~x~0)))) [2021-05-02 16:39:24,534 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-02 16:39:24,534 INFO L194 CegarLoopUtils]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 1)) (.cse1 (<= 0 main_~k~0))) (or (and .cse0 .cse1 (= main_~y~0 0) (<= 0 main_~c~0) (= main_~x~0 0)) (and (<= 1 main_~c~0) .cse0 .cse1 (= main_~y~0 1) (= main_~y~0 main_~x~0)))) [2021-05-02 16:39:24,534 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 40) no Hoare annotation was computed. [2021-05-02 16:39:24,534 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (and (= main_~y~0 1) (= main_~y~0 main_~x~0)) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 16:39:24,534 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-02 16:39:24,534 INFO L198 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-05-02 16:39:24,534 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 40) no Hoare annotation was computed. [2021-05-02 16:39:24,535 INFO L198 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-05-02 16:39:24,535 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 16:39:24,535 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 16:39:24,535 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 16:39:24,535 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:39:24,535 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:39:24,535 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 16:39:24,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:39:24 BoogieIcfgContainer [2021-05-02 16:39:24,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:39:24,562 INFO L168 Benchmark]: Toolchain (without parser) took 2868.65 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 145.1 MB in the beginning and 193.7 MB in the end (delta: -48.7 MB). Peak memory consumption was 84.5 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:24,562 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 181.4 MB. Free memory is still 161.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:39:24,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.49 ms. Allocated memory is still 181.4 MB. Free memory was 144.9 MB in the beginning and 164.4 MB in the end (delta: -19.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:24,563 INFO L168 Benchmark]: Boogie Preprocessor took 19.17 ms. Allocated memory is still 181.4 MB. Free memory was 164.4 MB in the beginning and 162.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:24,563 INFO L168 Benchmark]: RCFGBuilder took 256.56 ms. Allocated memory is still 181.4 MB. Free memory was 162.8 MB in the beginning and 148.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:24,563 INFO L168 Benchmark]: TraceAbstraction took 2397.35 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 148.1 MB in the beginning and 193.7 MB in the end (delta: -45.6 MB). Peak memory consumption was 87.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:24,566 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 181.4 MB. Free memory is still 161.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 189.49 ms. Allocated memory is still 181.4 MB. Free memory was 144.9 MB in the beginning and 164.4 MB in the end (delta: -19.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.17 ms. Allocated memory is still 181.4 MB. Free memory was 164.4 MB in the beginning and 162.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 256.56 ms. Allocated memory is still 181.4 MB. Free memory was 162.8 MB in the beginning and 148.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2397.35 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 148.1 MB in the beginning and 193.7 MB in the end (delta: -45.6 MB). Peak memory consumption was 87.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2001.4ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 33.2ms, AutomataDifference: 305.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 311.6ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 81 SDtfs, 35 SDslu, 247 SDs, 0 SdLazy, 122 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 122.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 162.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 10 LocationsWithAnnotation, 17 PreInvPairs, 23 NumberOfFragments, 118 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 64.9ms HoareSimplificationTime, 10 FomulaSimplificationsInter, 308 FormulaSimplificationTreeSizeReductionInter, 239.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 48.7ms SsaConstructionTime, 113.0ms SatisfiabilityAnalysisTime, 537.4ms InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 249 SizeOfPredicates, 8 NumberOfNonLiveVariables, 357 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/19 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: 27]: Loop Invariant Derived loop invariant: ((((k <= 1 && 0 <= k) && y == 0) && 0 <= c) && x == 0) || ((((1 <= c && k <= 1) && 0 <= k) && y == 1) && y == x) RESULT: Ultimate proved your program to be correct! Received shutdown request...