/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/ps6-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:52:18,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:52:18,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:52:18,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 13:52:18,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 13:52:18,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 13:52:18,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 13:52:18,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 13:52:18,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 13:52:18,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 13:52:18,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 13:52:18,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 13:52:18,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:52:18,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:52:18,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:52:18,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:52:18,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:52:18,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:52:18,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:52:18,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:52:18,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:52:18,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:52:18,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:52:18,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:52:18,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 13:52:18,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 13:52:18,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 13:52:18,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 13:52:18,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 13:52:18,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 13:52:18,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 13:52:18,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 13:52:18,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 13:52:18,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 13:52:18,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 13:52:18,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 13:52:18,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 13:52:18,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 13:52:18,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:52:18,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:52:18,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:52:18,606 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 13:52:18,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:52:18,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:52:18,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:52:18,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:52:18,632 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:52:18,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:52:18,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:52:18,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:52:18,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:52:18,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:52:18,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:52:18,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:52:18,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:52:18,633 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:52:18,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:52:18,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:52:18,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:52:18,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:52:18,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:52:18,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:52:18,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:52:18,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:52:18,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:52:18,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:52:18,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:52:18,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:52:18,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:52:18,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:52:18,635 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:52:18,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:52:18,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:52:18,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:52:18,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:52:18,920 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:52:18,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6-ll.c [2021-05-02 13:52:18,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa9efc57/5be76a0ed8de499eb6893d0fc35a60ee/FLAGf08525594 [2021-05-02 13:52:19,350 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:52:19,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6-ll.c [2021-05-02 13:52:19,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa9efc57/5be76a0ed8de499eb6893d0fc35a60ee/FLAGf08525594 [2021-05-02 13:52:19,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa9efc57/5be76a0ed8de499eb6893d0fc35a60ee [2021-05-02 13:52:19,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:52:19,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:52:19,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:52:19,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:52:19,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:52:19,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3110630f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19, skipping insertion in model container [2021-05-02 13:52:19,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:52:19,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:52:19,866 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/ps6-ll.c[458,471] [2021-05-02 13:52:19,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:52:19,879 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:52:19,886 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/ps6-ll.c[458,471] [2021-05-02 13:52:19,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:52:19,900 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:52:19,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19 WrapperNode [2021-05-02 13:52:19,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:52:19,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:52:19,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:52:19,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:52:19,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (1/1) ... [2021-05-02 13:52:19,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:52:19,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:52:19,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:52:19,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:52:19,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (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 13:52:20,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:52:20,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:52:20,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:52:20,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:52:20,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:52:20,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:52:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:52:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:52:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:52:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:52:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 13:52:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:52:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:52:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:52:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:52:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:52:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:52:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:52:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:52:20,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:52:20,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:52:20,251 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:52:20,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:52:20 BoogieIcfgContainer [2021-05-02 13:52:20,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:52:20,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:52:20,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:52:20,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:52:20,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:52:19" (1/3) ... [2021-05-02 13:52:20,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d19099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:52:20, skipping insertion in model container [2021-05-02 13:52:20,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:52:19" (2/3) ... [2021-05-02 13:52:20,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d19099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:52:20, skipping insertion in model container [2021-05-02 13:52:20,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:52:20" (3/3) ... [2021-05-02 13:52:20,256 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll.c [2021-05-02 13:52:20,259 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:52:20,261 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:52:20,271 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:52:20,283 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:52:20,283 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:52:20,283 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:52:20,283 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:52:20,283 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:52:20,283 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:52:20,283 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:52:20,283 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:52:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:52:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:52:20,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:20,295 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 13:52:20,295 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2021-05-02 13:52:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:20,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758973757] [2021-05-02 13:52:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:20,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:52:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:52:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:20,445 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 13:52:20,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:20,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758973757] [2021-05-02 13:52:20,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758973757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:52:20,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:52:20,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:52:20,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553452451] [2021-05-02 13:52:20,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:52:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:20,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:52:20,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:52:20,463 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 13:52:29,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:29,167 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2021-05-02 13:52:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:52:29,169 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 13:52:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:29,173 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:52:29,174 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 13:52:29,175 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:52:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 13:52:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 13:52:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:52:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-05-02 13:52:29,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2021-05-02 13:52:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:29,200 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-05-02 13:52:29,200 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 13:52:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-05-02 13:52:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:52:29,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:29,201 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 13:52:29,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:52:29,202 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:29,202 INFO L82 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2021-05-02 13:52:29,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:29,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220042827] [2021-05-02 13:52:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:29,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:29,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568762788] [2021-05-02 13:52:29,216 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 13:52:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:29,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:52:29,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:29,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:29,358 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 13:52:29,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:29,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220042827] [2021-05-02 13:52:29,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:29,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568762788] [2021-05-02 13:52:29,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568762788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:52:29,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:52:29,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 13:52:29,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966707168] [2021-05-02 13:52:29,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:52:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:29,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:52:29,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:52:29,361 INFO L87 Difference]: Start difference. First operand 23 states and 25 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 13:52:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:29,458 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 13:52:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:52:29,459 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 13:52:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:29,460 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:52:29,460 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:52:29,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:52:29,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:52:29,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:52:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:52:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 13:52:29,468 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-05-02 13:52:29,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:29,468 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 13:52:29,469 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 13:52:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 13:52:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 13:52:29,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:29,469 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 13:52:29,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:52:29,693 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:29,694 INFO L82 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2021-05-02 13:52:29,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:29,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673534291] [2021-05-02 13:52:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:29,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:29,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834558042] [2021-05-02 13:52:29,703 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 13:52:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:29,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:52:29,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:29,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:29,849 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 13:52:29,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:29,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673534291] [2021-05-02 13:52:29,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:29,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834558042] [2021-05-02 13:52:29,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834558042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:29,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:29,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:52:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007147707] [2021-05-02 13:52:29,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:52:29,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:52:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:52:29,852 INFO L87 Difference]: Start difference. First operand 30 states and 32 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 13:52:30,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:30,163 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-05-02 13:52:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:52:30,164 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 13:52:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:30,165 INFO L225 Difference]: With dead ends: 41 [2021-05-02 13:52:30,165 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:52:30,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:52:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:52:30,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 13:52:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:52:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 13:52:30,198 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2021-05-02 13:52:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:30,198 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 13:52:30,198 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 13:52:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 13:52:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 13:52:30,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:30,199 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 13:52:30,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:30,418 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:30,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:30,419 INFO L82 PathProgramCache]: Analyzing trace with hash -965543213, now seen corresponding path program 2 times [2021-05-02 13:52:30,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:30,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735269535] [2021-05-02 13:52:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:30,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:30,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108023579] [2021-05-02 13:52:30,442 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 13:52:30,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:52:30,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:52:30,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:52:30,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:30,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735269535] [2021-05-02 13:52:30,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:30,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108023579] [2021-05-02 13:52:30,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108023579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:30,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:30,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:52:30,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662974975] [2021-05-02 13:52:30,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:52:30,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:30,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:52:30,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:52:30,656 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:34,816 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-05-02 13:52:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:52:34,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-02 13:52:34,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:34,844 INFO L225 Difference]: With dead ends: 50 [2021-05-02 13:52:34,844 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 13:52:34,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:52:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 13:52:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 13:52:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 13:52:34,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 13:52:34,851 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2021-05-02 13:52:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:34,851 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 13:52:34,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:52:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 13:52:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:52:34,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:34,852 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:35,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:35,056 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1106328449, now seen corresponding path program 1 times [2021-05-02 13:52:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:35,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837492397] [2021-05-02 13:52:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:35,068 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:35,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402194832] [2021-05-02 13:52:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:52:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:52:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:35,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:52:35,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:35,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837492397] [2021-05-02 13:52:35,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:35,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402194832] [2021-05-02 13:52:35,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402194832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:35,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:35,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:52:35,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552277047] [2021-05-02 13:52:35,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:52:35,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:35,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:52:35,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:52:35,372 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:52:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:35,480 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 13:52:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:52:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2021-05-02 13:52:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:35,482 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:52:35,482 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:52:35,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:52:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:52:35,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 13:52:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:52:35,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 13:52:35,489 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 35 [2021-05-02 13:52:35,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:35,489 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 13:52:35,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:52:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 13:52:35,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 13:52:35,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:35,490 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:35,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:35,707 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:35,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1045939826, now seen corresponding path program 3 times [2021-05-02 13:52:35,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:35,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903371019] [2021-05-02 13:52:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:35,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:35,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702343666] [2021-05-02 13:52:35,717 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 13:52:35,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 13:52:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:52:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 13:52:35,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:35,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903371019] [2021-05-02 13:52:35,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:35,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702343666] [2021-05-02 13:52:35,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702343666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:35,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:35,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 13:52:35,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323119384] [2021-05-02 13:52:35,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:52:35,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:35,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:52:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:52:35,967 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 13:52:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:36,030 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-05-02 13:52:36,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:52:36,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-02 13:52:36,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:36,031 INFO L225 Difference]: With dead ends: 51 [2021-05-02 13:52:36,032 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 13:52:36,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:52:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 13:52:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-05-02 13:52:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:52:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-02 13:52:36,038 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 38 [2021-05-02 13:52:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:36,039 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-02 13:52:36,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 13:52:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-02 13:52:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:52:36,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:36,040 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:36,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 13:52:36,244 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:36,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1564024736, now seen corresponding path program 2 times [2021-05-02 13:52:36,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:36,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117932184] [2021-05-02 13:52:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:36,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:36,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376710568] [2021-05-02 13:52:36,253 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 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 13:52:36,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:52:36,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:52:36,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:52:36,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:52:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:36,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:36,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:36,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:36,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:38,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:46,591 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~y~0 2) (< 1 c_main_~k~0) (<= c_main_~k~0 2) (= (+ (* 12 c_main_~x~0) (* c_main_~y~0 c_main_~y~0)) (+ (* 5 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (* 6 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))))) is different from true [2021-05-02 13:52:46,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:46,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:48,635 WARN L860 $PredicateComparison]: unable to prove that (and (= (mod (+ (* 5 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 12) 0) (= c_main_~y~0 2) (< 1 c_main_~k~0) (<= c_main_~k~0 2)) is different from true [2021-05-02 13:52:48,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:48,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:48,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:52:48,666 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:52:48,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:52:48,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117932184] [2021-05-02 13:52:48,667 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:52:48,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376710568] [2021-05-02 13:52:48,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376710568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:52:48,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:52:48,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:52:48,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246307602] [2021-05-02 13:52:48,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:52:48,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:52:48,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:52:48,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=72, Unknown=3, NotChecked=34, Total=132 [2021-05-02 13:52:48,668 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 13:52:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:52:48,801 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 13:52:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:52:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2021-05-02 13:52:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:52:48,802 INFO L225 Difference]: With dead ends: 52 [2021-05-02 13:52:48,802 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 13:52:48,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 12298.4ms TimeCoverageRelationStatistics Valid=38, Invalid=123, Unknown=3, NotChecked=46, Total=210 [2021-05-02 13:52:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 13:52:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 13:52:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 13:52:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-05-02 13:52:48,807 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 42 [2021-05-02 13:52:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:52:48,808 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-05-02 13:52:48,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 13:52:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-05-02 13:52:48,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 13:52:48,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:52:48,809 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:52:49,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:52:49,026 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:52:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:52:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1951214241, now seen corresponding path program 3 times [2021-05-02 13:52:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:52:49,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585505887] [2021-05-02 13:52:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:52:49,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:52:49,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605118685] [2021-05-02 13:52:49,033 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 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