/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/hard-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:30:21,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:30:21,373 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:30:21,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 15:30:21,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 15:30:21,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 15:30:21,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 15:30:21,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 15:30:21,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 15:30:21,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 15:30:21,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 15:30:21,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 15:30:21,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:30:21,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:30:21,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:30:21,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:30:21,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:30:21,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:30:21,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:30:21,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:30:21,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:30:21,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:30:21,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:30:21,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:30:21,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 15:30:21,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 15:30:21,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 15:30:21,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 15:30:21,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 15:30:21,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 15:30:21,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 15:30:21,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 15:30:21,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 15:30:21,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 15:30:21,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 15:30:21,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 15:30:21,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 15:30:21,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 15:30:21,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:30:21,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:30:21,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:30:21,453 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 15:30:21,477 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:30:21,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:30:21,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:30:21,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:30:21,480 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:30:21,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:30:21,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:30:21,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:30:21,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:30:21,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:30:21,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:30:21,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:30:21,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:30:21,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:30:21,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:30:21,481 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:30:21,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:30:21,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:30:21,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:30:21,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:30:21,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:30:21,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:30:21,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:30:21,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:30:21,715 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:30:21,716 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:30:21,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-02 15:30:21,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5c5104ad/c04dee11f57c4d108b572517679ac896/FLAG26131052f [2021-05-02 15:30:22,127 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:30:22,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-02 15:30:22,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5c5104ad/c04dee11f57c4d108b572517679ac896/FLAG26131052f [2021-05-02 15:30:22,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5c5104ad/c04dee11f57c4d108b572517679ac896 [2021-05-02 15:30:22,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:30:22,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:30:22,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:30:22,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:30:22,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:30:22,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f8313b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22, skipping insertion in model container [2021-05-02 15:30:22,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:30:22,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:30:22,621 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/hard-u_unwindbound2.c[545,558] [2021-05-02 15:30:22,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:30:22,635 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:30:22,645 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/hard-u_unwindbound2.c[545,558] [2021-05-02 15:30:22,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:30:22,658 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:30:22,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22 WrapperNode [2021-05-02 15:30:22,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:30:22,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:30:22,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:30:22,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:30:22,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (1/1) ... [2021-05-02 15:30:22,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:30:22,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:30:22,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:30:22,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:30:22,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (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 15:30:22,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:30:22,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:30:22,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:30:22,751 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:30:22,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:30:22,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:30:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:30:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:30:22,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:30:22,939 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:30:22,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:30:22 BoogieIcfgContainer [2021-05-02 15:30:22,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:30:22,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:30:22,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:30:22,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:30:22,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:30:22" (1/3) ... [2021-05-02 15:30:22,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374a76fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:30:22, skipping insertion in model container [2021-05-02 15:30:22,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:30:22" (2/3) ... [2021-05-02 15:30:22,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374a76fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:30:22, skipping insertion in model container [2021-05-02 15:30:22,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:30:22" (3/3) ... [2021-05-02 15:30:22,944 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c [2021-05-02 15:30:22,948 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:30:22,950 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:30:22,968 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:30:22,994 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:30:22,994 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:30:22,994 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:30:22,994 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:30:22,994 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:30:22,994 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:30:22,994 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:30:22,995 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:30:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:30:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:30:23,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:23,009 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:23,010 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:23,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:30:23,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:23,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97759269] [2021-05-02 15:30:23,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:23,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:30:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:23,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:30:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:23,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:23,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97759269] [2021-05-02 15:30:23,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97759269] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:23,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:23,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:30:23,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783135518] [2021-05-02 15:30:23,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:30:23,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:30:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:30:23,235 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:23,323 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:30:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:30:23,324 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:30:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:23,329 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:30:23,329 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:30:23,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:30:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:30:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:30:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:30:23,357 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:30:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:23,357 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:30:23,358 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:30:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:30:23,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:23,359 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:23,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:30:23,359 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:23,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:23,360 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:30:23,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:23,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372813485] [2021-05-02 15:30:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:23,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:30:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:30:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:23,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:23,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372813485] [2021-05-02 15:30:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372813485] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:23,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:23,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:30:23,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190067454] [2021-05-02 15:30:23,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:30:23,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:30:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:23,507 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:23,752 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:30:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:23,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:30:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:23,754 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:30:23,754 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:30:23,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:30:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:30:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:30:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:30:23,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:30:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:23,774 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:30:23,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:30:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:30:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:30:23,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:23,775 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:23,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:30:23,776 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:23,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:23,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:30:23,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:23,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702880211] [2021-05-02 15:30:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:23,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:23,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876986552] [2021-05-02 15:30:23,796 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 15:30:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:23,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:30:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:23,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:23,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:23,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:23,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:23,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:23,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702880211] [2021-05-02 15:30:23,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:23,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876986552] [2021-05-02 15:30:23,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876986552] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:23,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:23,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:30:23,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574411244] [2021-05-02 15:30:23,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:30:23,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:30:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:30:23,910 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:30:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:23,919 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:30:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:30:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:30:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:23,920 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:30:23,920 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:30:23,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:30:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:30:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:30:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:30:23,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:30:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:23,925 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:30:23,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:30:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:30:23,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:30:23,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:23,925 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:24,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:30:24,145 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:24,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:24,146 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:30:24,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:24,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390150316] [2021-05-02 15:30:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:24,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:30:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:30:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:24,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:30:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:30:24,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:24,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390150316] [2021-05-02 15:30:24,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390150316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:24,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:24,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:30:24,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42322350] [2021-05-02 15:30:24,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:30:24,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:30:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:24,272 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:30:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:24,438 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:30:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:30:24,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:24,439 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:30:24,439 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:30:24,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:30:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:30:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:30:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:30:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:30:24,444 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:30:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:24,444 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:30:24,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:30:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:30:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:30:24,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:24,445 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:24,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:30:24,445 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:30:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751170959] [2021-05-02 15:30:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:24,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:24,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920845452] [2021-05-02 15:30:24,452 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 15:30:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:24,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:30:24,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:24,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:30:24,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:24,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751170959] [2021-05-02 15:30:24,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:24,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920845452] [2021-05-02 15:30:24,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920845452] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:24,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:24,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 15:30:24,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129217112] [2021-05-02 15:30:24,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:30:24,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:24,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:30:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:30:24,586 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:30:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:24,699 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2021-05-02 15:30:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:30:24,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:30:24,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:24,701 INFO L225 Difference]: With dead ends: 71 [2021-05-02 15:30:24,701 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:30:24,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:30:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:30:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 15:30:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:30:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 15:30:24,707 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-02 15:30:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:24,707 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 15:30:24,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:30:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 15:30:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:30:24,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:24,708 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-02 15:30:24,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:24,914 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:24,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:30:24,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:24,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335898286] [2021-05-02 15:30:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:24,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:24,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406683990] [2021-05-02 15:30:24,922 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 15:30:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:24,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:30:24,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:24,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:24,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:30:25,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:25,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335898286] [2021-05-02 15:30:25,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:25,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406683990] [2021-05-02 15:30:25,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406683990] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:25,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:25,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:30:25,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911871346] [2021-05-02 15:30:25,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:30:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:30:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:30:25,066 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:25,095 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-02 15:30:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:30:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:30:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:25,097 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:30:25,097 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:30:25,098 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:30:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:30:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 15:30:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:30:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 15:30:25,115 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 15:30:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:25,116 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 15:30:25,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 15:30:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:30:25,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:25,119 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-02 15:30:25,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:25,320 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-02 15:30:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55711136] [2021-05-02 15:30:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:25,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:25,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792000247] [2021-05-02 15:30:25,327 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 15:30:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:25,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:30:25,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:25,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:30:25,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55711136] [2021-05-02 15:30:25,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792000247] [2021-05-02 15:30:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792000247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:30:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:30:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:30:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164292295] [2021-05-02 15:30:25,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:30:25,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:30:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:30:25,524 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:30:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:25,638 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-02 15:30:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:30:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 15:30:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:25,641 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:30:25,642 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:30:25,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:30:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:30:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:30:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:30:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:30:25,651 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:30:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:25,651 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:30:25,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:30:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:30:25,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:30:25,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:25,655 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-02 15:30:25,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:25,869 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:30:25,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:25,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341522691] [2021-05-02 15:30:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:25,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:25,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399827411] [2021-05-02 15:30:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:30:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:30:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:25,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:25,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:30:26,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:26,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341522691] [2021-05-02 15:30:26,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:26,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399827411] [2021-05-02 15:30:26,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399827411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:26,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:26,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:30:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452029039] [2021-05-02 15:30:26,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:30:26,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:30:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:30:26,017 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:26,043 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-02 15:30:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:30:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 15:30:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:26,044 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:30:26,044 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:30:26,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:30:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:30:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:30:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:30:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 15:30:26,048 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 15:30:26,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:26,048 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 15:30:26,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:30:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 15:30:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:30:26,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:26,049 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:26,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:26,267 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:26,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-02 15:30:26,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:26,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7123533] [2021-05-02 15:30:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:26,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:26,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940445381] [2021-05-02 15:30:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:30:26,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:26,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 15:30:26,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7123533] [2021-05-02 15:30:26,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940445381] [2021-05-02 15:30:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940445381] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:26,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:26,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:30:26,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330339585] [2021-05-02 15:30:26,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:30:26,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:26,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:30:26,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:30:26,560 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:30:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:26,723 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2021-05-02 15:30:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:30:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 15:30:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:26,725 INFO L225 Difference]: With dead ends: 83 [2021-05-02 15:30:26,725 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 15:30:26,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:30:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 15:30:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 15:30:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:30:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-05-02 15:30:26,730 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 46 [2021-05-02 15:30:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:26,731 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-05-02 15:30:26,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:30:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-05-02 15:30:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:30:26,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:26,731 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:30:26,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:30:26,934 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:26,935 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-02 15:30:26,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:26,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992871638] [2021-05-02 15:30:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:26,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:26,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328041206] [2021-05-02 15:30:26,942 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 15:30:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:30:27,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:30:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:30:27,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:30:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:30:27,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:30:27,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992871638] [2021-05-02 15:30:27,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:30:27,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328041206] [2021-05-02 15:30:27,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328041206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:30:27,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:30:27,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:30:27,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087772601] [2021-05-02 15:30:27,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:30:27,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:30:27,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:30:27,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:30:27,222 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:30:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:27,402 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2021-05-02 15:30:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:30:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 15:30:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:27,404 INFO L225 Difference]: With dead ends: 94 [2021-05-02 15:30:27,404 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 15:30:27,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:30:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 15:30:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2021-05-02 15:30:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:30:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2021-05-02 15:30:27,410 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 54 [2021-05-02 15:30:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:27,410 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2021-05-02 15:30:27,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:30:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2021-05-02 15:30:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 15:30:27,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:30:27,411 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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] [2021-05-02 15:30:27,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:30:27,615 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:30:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:30:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 967982746, now seen corresponding path program 1 times [2021-05-02 15:30:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:30:27,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392152630] [2021-05-02 15:30:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:30:27,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:30:27,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240245379] [2021-05-02 15:30:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:30:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:30:27,700 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:30:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:30:27,718 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:30:27,757 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:30:27,757 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:30:27,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:30:28,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:30:28 BoogieIcfgContainer [2021-05-02 15:30:28,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:30:28,003 INFO L168 Benchmark]: Toolchain (without parser) took 5473.00 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.9 MB in the beginning and 156.0 MB in the end (delta: 13.8 MB). Peak memory consumption was 55.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:28,003 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 204.5 MB. Free memory was 186.5 MB in the beginning and 186.2 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:30:28,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 126.79 ms. Allocated memory is still 204.5 MB. Free memory was 169.7 MB in the beginning and 159.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:28,003 INFO L168 Benchmark]: Boogie Preprocessor took 48.38 ms. Allocated memory is still 204.5 MB. Free memory was 159.7 MB in the beginning and 186.8 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:28,003 INFO L168 Benchmark]: RCFGBuilder took 230.23 ms. Allocated memory is still 204.5 MB. Free memory was 186.8 MB in the beginning and 169.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:28,004 INFO L168 Benchmark]: TraceAbstraction took 5062.06 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.5 MB in the beginning and 156.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 54.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:30:28,004 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 204.5 MB. Free memory was 186.5 MB in the beginning and 186.2 MB in the end (delta: 215.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 126.79 ms. Allocated memory is still 204.5 MB. Free memory was 169.7 MB in the beginning and 159.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.38 ms. Allocated memory is still 204.5 MB. Free memory was 159.7 MB in the beginning and 186.8 MB in the end (delta: -27.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 230.23 ms. Allocated memory is still 204.5 MB. Free memory was 186.8 MB in the beginning and 169.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5062.06 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 169.5 MB in the beginning and 156.0 MB in the end (delta: 13.4 MB). Peak memory consumption was 54.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=-2147483649, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=0, d=-2147483649, p=1, q=0, r=-2147483649] [L35] EXPR counter++ VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, counter++=0, d=-2147483649, p=1, q=0, r=-2147483649] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-2147483649, p=1, q=0, r=-2147483649] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-2147483649, p=1, q=0, r=-2147483649] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-2147483649, p=1, q=0, r=-2147483649] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-4294967298, p=2, q=0, r=-2147483649] [L35] EXPR counter++ VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, counter++=1, d=-4294967298, p=2, q=0, r=-2147483649] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L39] COND TRUE !(r >= d) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L45] EXPR counter++ VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=3, counter++=2, d=-4294967298, p=2, q=0, r=-2147483649] [L45] COND FALSE !(counter++<2) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=3, d=-4294967298, p=2, q=0, r=-2147483649] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4981.6ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 14.9ms, AutomataDifference: 1178.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 411 SDtfs, 201 SDslu, 1266 SDs, 0 SdLazy, 656 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 604.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 511.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=10, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 89.4ms AutomataMinimizationTime, 10 MinimizatonAttempts, 29 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 66.9ms SsaConstructionTime, 410.4ms SatisfiabilityAnalysisTime, 1128.5ms InterpolantComputationTime, 376 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 1168 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1047 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 186/199 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...