/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:18:20,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:18:20,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:18:20,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 15:18:20,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 15:18:20,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 15:18:20,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 15:18:20,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 15:18:20,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 15:18:20,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 15:18:20,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 15:18:20,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 15:18:20,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:18:20,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:18:20,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:18:20,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:18:20,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:18:20,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:18:20,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:18:20,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:18:20,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:18:20,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:18:20,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:18:20,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:18:20,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 15:18:20,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 15:18:20,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 15:18:20,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 15:18:20,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 15:18:20,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 15:18:20,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 15:18:20,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 15:18:20,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 15:18:20,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 15:18:20,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 15:18:20,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 15:18:20,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 15:18:20,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 15:18:20,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:18:20,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:18:20,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:18:20,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:18:20,870 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:18:20,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:18:20,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:18:20,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:18:20,871 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:18:20,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:18:20,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:18:20,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:18:20,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:18:20,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:18:20,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:18:20,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:18:20,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:18:21,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:18:21,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:18:21,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:18:21,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:18:21,136 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:18:21,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c [2021-05-02 15:18:21,174 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e80ac104/ee629b135fc94bdcb08051a6223e3f5f/FLAG8ca13a664 [2021-05-02 15:18:21,478 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:18:21,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c [2021-05-02 15:18:21,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e80ac104/ee629b135fc94bdcb08051a6223e3f5f/FLAG8ca13a664 [2021-05-02 15:18:21,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e80ac104/ee629b135fc94bdcb08051a6223e3f5f [2021-05-02 15:18:21,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:18:21,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:18:21,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:18:21,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:18:21,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:18:21,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:18:21" (1/1) ... [2021-05-02 15:18:21,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f503cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:21, skipping insertion in model container [2021-05-02 15:18:21,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:18:21" (1/1) ... [2021-05-02 15:18:21,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:18:21,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:18:22,029 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c[524,537] [2021-05-02 15:18:22,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:18:22,043 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:18:22,050 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound50.c[524,537] [2021-05-02 15:18:22,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:18:22,066 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:18:22,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22 WrapperNode [2021-05-02 15:18:22,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:18:22,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:18:22,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:18:22,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:18:22,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... [2021-05-02 15:18:22,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... [2021-05-02 15:18:22,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... [2021-05-02 15:18:22,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... [2021-05-02 15:18:22,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... [2021-05-02 15:18:22,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... [2021-05-02 15:18:22,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... [2021-05-02 15:18:22,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:18:22,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:18:22,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:18:22,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:18:22,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:18:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:18:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:18:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:18:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:18:22,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:18:22,173 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:18:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:18:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:18:22,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:18:22,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:18:22,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:18:22,174 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:18:22,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:18:22,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:18:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:18:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:18:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:18:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:18:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:18:22,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:18:22,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:18:22,402 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:18:22,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:18:22 BoogieIcfgContainer [2021-05-02 15:18:22,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:18:22,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:18:22,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:18:22,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:18:22,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:18:21" (1/3) ... [2021-05-02 15:18:22,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591a699e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:18:22, skipping insertion in model container [2021-05-02 15:18:22,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:18:22" (2/3) ... [2021-05-02 15:18:22,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591a699e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:18:22, skipping insertion in model container [2021-05-02 15:18:22,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:18:22" (3/3) ... [2021-05-02 15:18:22,407 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound50.c [2021-05-02 15:18:22,411 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:18:22,413 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:18:22,423 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:18:22,436 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:18:22,436 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:18:22,436 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:18:22,436 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:18:22,436 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:18:22,436 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:18:22,437 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:18:22,437 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:18:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:18:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:18:22,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:22,450 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:22,450 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times [2021-05-02 15:18:22,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:22,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366693033] [2021-05-02 15:18:22,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:22,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:18:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:22,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:18:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:22,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:18:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:22,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:18:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:22,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:18:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:18:22,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:22,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366693033] [2021-05-02 15:18:22,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366693033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:18:22,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:18:22,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:18:22,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596527133] [2021-05-02 15:18:22,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:18:22,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:18:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:18:22,654 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:18:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:22,748 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-05-02 15:18:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:18:22,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:18:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:22,755 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:18:22,755 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:18:22,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:18:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:18:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:18:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:18:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 15:18:22,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 15:18:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:22,799 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 15:18:22,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:18:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 15:18:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:18:22,801 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:22,801 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:22,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:18:22,801 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times [2021-05-02 15:18:22,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:22,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082702152] [2021-05-02 15:18:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:22,834 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:22,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943270831] [2021-05-02 15:18:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:22,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:18:22,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:22,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:22,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:22,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:22,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:22,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:22,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:18:23,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:23,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082702152] [2021-05-02 15:18:23,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:23,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943270831] [2021-05-02 15:18:23,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943270831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:23,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:23,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:18:23,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929337953] [2021-05-02 15:18:23,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:18:23,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:23,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:18:23,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:18:23,152 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:18:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:23,291 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-05-02 15:18:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:18:23,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:18:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:23,292 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:18:23,292 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:18:23,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:18:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:18:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 15:18:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:18:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 15:18:23,300 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 15:18:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:23,301 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 15:18:23,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:18:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 15:18:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:18:23,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:23,302 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:23,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:18:23,503 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:23,503 INFO L82 PathProgramCache]: Analyzing trace with hash -453872510, now seen corresponding path program 1 times [2021-05-02 15:18:23,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:23,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104152057] [2021-05-02 15:18:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:23,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:23,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421007405] [2021-05-02 15:18:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:23,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:18:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:23,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:18:23,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:23,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104152057] [2021-05-02 15:18:23,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:23,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421007405] [2021-05-02 15:18:23,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421007405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:23,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:23,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:18:23,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295817760] [2021-05-02 15:18:23,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:18:23,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:23,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:18:23,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:18:23,766 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:18:38,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:38,054 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-05-02 15:18:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:18:38,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 15:18:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:38,056 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:18:38,056 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 15:18:38,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:18:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 15:18:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 15:18:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:18:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 15:18:38,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 39 [2021-05-02 15:18:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:38,065 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 15:18:38,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:18:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 15:18:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:18:38,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:38,066 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:38,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:38,283 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:38,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1657118275, now seen corresponding path program 1 times [2021-05-02 15:18:38,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:38,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045232800] [2021-05-02 15:18:38,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:38,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:38,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176344939] [2021-05-02 15:18:38,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:18:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:38,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:18:38,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:38,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045232800] [2021-05-02 15:18:38,581 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:38,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176344939] [2021-05-02 15:18:38,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176344939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:38,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:38,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:18:38,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149827442] [2021-05-02 15:18:38,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:18:38,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:18:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:18:38,583 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:18:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:40,968 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-05-02 15:18:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:18:40,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 15:18:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:40,970 INFO L225 Difference]: With dead ends: 63 [2021-05-02 15:18:40,970 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 15:18:40,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:18:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 15:18:40,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-05-02 15:18:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:18:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-05-02 15:18:40,978 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 41 [2021-05-02 15:18:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:40,978 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-05-02 15:18:40,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:18:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-05-02 15:18:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:18:40,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:18:40,979 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:18:41,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:41,196 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:18:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:18:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash 719802432, now seen corresponding path program 1 times [2021-05-02 15:18:41,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:18:41,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409051742] [2021-05-02 15:18:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:18:41,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:18:41,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474638412] [2021-05-02 15:18:41,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:18:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:18:41,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:18:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:18:41,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:18:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:18:41,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:18:41,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409051742] [2021-05-02 15:18:41,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:18:41,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474638412] [2021-05-02 15:18:41,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474638412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:18:41,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:18:41,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:18:41,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119356068] [2021-05-02 15:18:41,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:18:41,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:18:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:18:41,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:18:41,435 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:19:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:05,342 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-05-02 15:19:05,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:19:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 15:19:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:05,343 INFO L225 Difference]: With dead ends: 65 [2021-05-02 15:19:05,343 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:19:05,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:19:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:19:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-05-02 15:19:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:19:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 15:19:05,351 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 47 [2021-05-02 15:19:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:05,351 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 15:19:05,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:19:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 15:19:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:19:05,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:05,357 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:05,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:05,558 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:05,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1974186685, now seen corresponding path program 2 times [2021-05-02 15:19:05,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:05,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635880924] [2021-05-02 15:19:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:05,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:05,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101778248] [2021-05-02 15:19:05,566 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:05,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:19:05,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:19:05,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:19:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:19:05,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:05,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635880924] [2021-05-02 15:19:05,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:19:05,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101778248] [2021-05-02 15:19:05,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101778248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:19:05,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:19:05,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:19:05,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660991434] [2021-05-02 15:19:05,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:19:05,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:19:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:19:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:19:05,860 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:19:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:08,430 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-02 15:19:08,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:19:08,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 15:19:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:08,432 INFO L225 Difference]: With dead ends: 58 [2021-05-02 15:19:08,432 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:19:08,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:19:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:19:08,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 15:19:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:19:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 15:19:08,438 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 15:19:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:08,438 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 15:19:08,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:19:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 15:19:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 15:19:08,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:08,439 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:08,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:19:08,645 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash -197393475, now seen corresponding path program 3 times [2021-05-02 15:19:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:08,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060163405] [2021-05-02 15:19:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:08,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:08,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550103983] [2021-05-02 15:19:08,652 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:08,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:19:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:19:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:19:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:08,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 15:19:08,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060163405] [2021-05-02 15:19:08,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:19:08,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550103983] [2021-05-02 15:19:08,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550103983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:19:08,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:19:08,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:19:08,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872610656] [2021-05-02 15:19:08,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:19:08,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:19:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:19:08,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:19:08,797 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:19:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:12,940 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-05-02 15:19:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:19:12,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 15:19:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:12,941 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:19:12,941 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 15:19:12,942 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:19:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 15:19:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 15:19:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:19:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 15:19:12,948 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 15:19:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:12,948 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 15:19:12,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:19:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 15:19:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 15:19:12,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:12,948 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:13,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:13,163 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:13,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:13,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1923807749, now seen corresponding path program 1 times [2021-05-02 15:19:13,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:13,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120103099] [2021-05-02 15:19:13,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:13,170 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:13,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504246065] [2021-05-02 15:19:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:19:13,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 15:19:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:13,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:13,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:13,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:13,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:13,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:13,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:13,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:13,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:23,452 WARN L205 SmtUtils]: Spent 8.05 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 15:19:29,083 WARN L205 SmtUtils]: Spent 5.59 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 15:19:29,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:29,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,225 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 15:19:36,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:36,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:42,742 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:19:59,142 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:19:59,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:59,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 41 refuted. 4 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 15:19:59,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:59,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120103099] [2021-05-02 15:19:59,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:19:59,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504246065] [2021-05-02 15:19:59,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504246065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:19:59,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:19:59,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:19:59,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999305736] [2021-05-02 15:19:59,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:19:59,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:19:59,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:19:59,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 15:19:59,192 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:21:22,949 WARN L205 SmtUtils]: Spent 10.06 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 15:21:31,100 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 34 [2021-05-02 15:22:02,742 WARN L205 SmtUtils]: Spent 8.09 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 15:22:14,168 WARN L205 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 15:22:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:57,234 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2021-05-02 15:22:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 15:22:57,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 65 [2021-05-02 15:22:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:57,238 INFO L225 Difference]: With dead ends: 116 [2021-05-02 15:22:57,238 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 15:22:57,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 87994.2ms TimeCoverageRelationStatistics Valid=84, Invalid=365, Unknown=13, NotChecked=0, Total=462 [2021-05-02 15:22:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 15:22:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-05-02 15:22:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 69 states have internal predecessors, (77), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:22:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2021-05-02 15:22:57,253 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 65 [2021-05-02 15:22:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:57,254 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2021-05-02 15:22:57,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:22:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2021-05-02 15:22:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:22:57,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:57,255 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:22:57,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:57,455 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:57,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1860102713, now seen corresponding path program 2 times [2021-05-02 15:22:57,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:57,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653802034] [2021-05-02 15:22:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:57,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:22:57,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783721967] [2021-05-02 15:22:57,465 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:57,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:22:57,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:22:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 15:22:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 15:22:57,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:57,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653802034] [2021-05-02 15:22:57,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:57,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783721967] [2021-05-02 15:22:57,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783721967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:57,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:57,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:22:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880330204] [2021-05-02 15:22:57,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:22:57,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:22:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:22:57,828 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 15:22:58,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:58,213 INFO L93 Difference]: Finished difference Result 140 states and 164 transitions. [2021-05-02 15:22:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:22:58,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2021-05-02 15:22:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:58,214 INFO L225 Difference]: With dead ends: 140 [2021-05-02 15:22:58,214 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:22:58,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:22:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:22:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-02 15:22:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 73 states have internal predecessors, (82), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:22:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2021-05-02 15:22:58,226 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 73 [2021-05-02 15:22:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:58,227 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2021-05-02 15:22:58,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 15:22:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2021-05-02 15:22:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:22:58,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:58,229 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:22:58,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:22:58,446 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1204892615, now seen corresponding path program 3 times [2021-05-02 15:22:58,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:58,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672330218] [2021-05-02 15:22:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:58,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:22:58,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244544393] [2021-05-02 15:22:58,465 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:58,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:22:58,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:22:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:22:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:58,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 15:22:58,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:58,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672330218] [2021-05-02 15:22:58,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:58,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244544393] [2021-05-02 15:22:58,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244544393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:58,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:58,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:22:58,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829872176] [2021-05-02 15:22:58,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:22:58,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:58,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:22:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:22:58,754 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:23:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:05,288 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2021-05-02 15:23:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:23:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 15:23:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:05,289 INFO L225 Difference]: With dead ends: 112 [2021-05-02 15:23:05,289 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:23:05,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:23:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:23:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:23:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 15:23:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:23:05,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 15:23:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:05,290 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:23:05,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:23:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:23:05,290 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:23:05,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:05,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:23:09,750 WARN L205 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2021-05-02 15:23:20,984 WARN L205 SmtUtils]: Spent 11.17 s on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2021-05-02 15:23:32,173 WARN L205 SmtUtils]: Spent 11.19 s on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2021-05-02 15:23:32,209 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 15:23:32,209 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 15:23:32,209 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 15:23:32,209 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:32,209 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:23:32,209 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:23:32,210 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 46) the Hoare annotation is: (let ((.cse1 (* main_~v~0 main_~v~0)) (.cse2 (* main_~A~0 4)) (.cse3 (* main_~u~0 2)) (.cse0 (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)))) (and (= .cse0 (+ .cse1 .cse2 (* main_~r~0 4) .cse3)) (<= 0 main_~A~0) (= (+ .cse1 .cse2 .cse3) .cse0) (<= main_~A~0 50))) [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (<= main_~A~0 50)) [2021-05-02 15:23:32,210 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 50)) [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 51) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L194 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 50)) [2021-05-02 15:23:32,210 INFO L201 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-05-02 15:23:32,210 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 51) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (<= 0 main_~A~0) (<= main_~A~0 50) (= (mod main_~A~0 2) 1)) [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 46) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 51) the Hoare annotation is: true [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point L49(line 49) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point L39(lines 39 45) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L194 CegarLoopUtils]: At program point L39-2(lines 35 46) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (<= 0 main_~A~0) (<= main_~A~0 50) (= (mod main_~A~0 2) 1)) [2021-05-02 15:23:32,211 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 15:23:32,211 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 15:23:32,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:23:32 BoogieIcfgContainer [2021-05-02 15:23:32,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:23:32,225 INFO L168 Benchmark]: Toolchain (without parser) took 310298.10 ms. Allocated memory was 195.0 MB in the beginning and 235.9 MB in the end (delta: 40.9 MB). Free memory was 159.3 MB in the beginning and 114.9 MB in the end (delta: 44.4 MB). Peak memory consumption was 85.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:32,225 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:23:32,225 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.47 ms. Allocated memory is still 195.0 MB. Free memory was 159.1 MB in the beginning and 178.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:32,225 INFO L168 Benchmark]: Boogie Preprocessor took 48.16 ms. Allocated memory is still 195.0 MB. Free memory was 178.4 MB in the beginning and 176.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:32,225 INFO L168 Benchmark]: RCFGBuilder took 286.78 ms. Allocated memory is still 195.0 MB. Free memory was 176.9 MB in the beginning and 161.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:32,225 INFO L168 Benchmark]: TraceAbstraction took 309820.34 ms. Allocated memory was 195.0 MB in the beginning and 235.9 MB in the end (delta: 40.9 MB). Free memory was 161.3 MB in the beginning and 114.9 MB in the end (delta: 46.4 MB). Peak memory consumption was 88.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:32,225 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 134.47 ms. Allocated memory is still 195.0 MB. Free memory was 159.1 MB in the beginning and 178.4 MB in the end (delta: -19.3 MB). Peak memory consumption was 8.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.16 ms. Allocated memory is still 195.0 MB. Free memory was 178.4 MB in the beginning and 176.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 286.78 ms. Allocated memory is still 195.0 MB. Free memory was 176.9 MB in the beginning and 161.6 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 309820.34 ms. Allocated memory was 195.0 MB in the beginning and 235.9 MB in the end (delta: 40.9 MB). Free memory was 161.3 MB in the beginning and 114.9 MB in the end (delta: 46.4 MB). Peak memory consumption was 88.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 283056.6ms, OverallIterations: 10, TraceHistogramMax: 6, EmptinessCheckTime: 17.8ms, AutomataDifference: 232530.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 26717.4ms, InitialAbstractionConstructionTime: 6.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 246 SDtfs, 178 SDslu, 1190 SDs, 0 SdLazy, 1338 SolverSat, 89 SolverUnsat, 68 SolverUnknown, 0 SolverNotchecked, 188748.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 519 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 89003.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=9, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 99.0ms AutomataMinimizationTime, 10 MinimizatonAttempts, 55 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 13 LocationsWithAnnotation, 42 PreInvPairs, 75 NumberOfFragments, 200 HoareAnnotationTreeSize, 42 FomulaSimplifications, 7815 FormulaSimplificationTreeSizeReduction, 123.3ms HoareSimplificationTime, 13 FomulaSimplificationsInter, 763 FormulaSimplificationTreeSizeReductionInter, 26586.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 62.8ms SsaConstructionTime, 314.5ms SatisfiabilityAnalysisTime, 47776.2ms InterpolantComputationTime, 510 NumberOfCodeBlocks, 440 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 500 ConstructedInterpolants, 0 QuantifiedInterpolants, 2896 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1415 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 421/573 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((R * R + 1 < A + 2 * R && u * u + v * 2 == v * v + A * 4 + r * 4 + u * 2) && 0 <= A) && A <= 50) && A % 2 == 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...