/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/egcd3-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:58:47,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:58:47,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:58:47,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 14:58:47,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 14:58:47,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 14:58:47,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 14:58:47,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 14:58:47,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 14:58:47,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 14:58:47,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 14:58:47,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 14:58:47,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:58:47,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:58:47,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:58:47,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:58:47,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:58:47,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:58:47,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:58:47,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:58:47,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:58:47,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:58:47,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:58:47,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:58:47,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 14:58:47,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 14:58:47,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 14:58:47,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 14:58:47,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 14:58:47,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 14:58:47,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 14:58:47,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 14:58:47,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 14:58:47,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 14:58:47,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 14:58:47,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 14:58:47,965 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 14:58:47,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 14:58:47,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:58:47,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:58:47,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:58:47,974 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 14:58:48,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:58:48,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:58:48,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:58:48,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:58:48,003 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:58:48,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:58:48,003 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:58:48,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:58:48,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:58:48,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:58:48,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:58:48,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:58:48,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:58:48,004 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:58:48,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:58:48,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:58:48,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:58:48,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:58:48,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:58:48,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:58:48,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:58:48,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:58:48,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:58:48,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:58:48,225 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:58:48,225 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:58:48,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2021-05-02 14:58:48,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47fca2248/39c01cb05b604eadad2e9979dbf8b246/FLAGd26f18b59 [2021-05-02 14:58:48,664 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:58:48,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound1.c [2021-05-02 14:58:48,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47fca2248/39c01cb05b604eadad2e9979dbf8b246/FLAGd26f18b59 [2021-05-02 14:58:48,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47fca2248/39c01cb05b604eadad2e9979dbf8b246 [2021-05-02 14:58:48,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:58:48,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:58:48,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:58:48,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:58:48,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:58:48,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c1921fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48, skipping insertion in model container [2021-05-02 14:58:48,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:58:48,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:58:48,817 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/egcd3-ll_unwindbound1.c[490,503] [2021-05-02 14:58:48,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:58:48,850 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:58:48,878 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/egcd3-ll_unwindbound1.c[490,503] [2021-05-02 14:58:48,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:58:48,903 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:58:48,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48 WrapperNode [2021-05-02 14:58:48,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:58:48,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:58:48,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:58:48,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:58:48,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (1/1) ... [2021-05-02 14:58:48,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:58:48,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:58:48,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:58:48,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:58:48,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (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 14:58:49,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:58:49,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:58:49,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:58:49,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:58:49,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:58:49,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:58:49,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:58:49,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:58:49,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:58:49,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:58:49,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:58:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:58:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:58:49,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:58:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:58:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:58:49,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:58:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:58:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:58:49,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:58:49,240 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:58:49,241 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 14:58:49,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:58:49 BoogieIcfgContainer [2021-05-02 14:58:49,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:58:49,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:58:49,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:58:49,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:58:49,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:58:48" (1/3) ... [2021-05-02 14:58:49,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd18f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:58:49, skipping insertion in model container [2021-05-02 14:58:49,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:58:48" (2/3) ... [2021-05-02 14:58:49,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dd18f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:58:49, skipping insertion in model container [2021-05-02 14:58:49,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:58:49" (3/3) ... [2021-05-02 14:58:49,246 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound1.c [2021-05-02 14:58:49,249 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:58:49,251 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:58:49,261 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:58:49,274 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:58:49,274 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:58:49,274 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:58:49,275 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:58:49,275 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:58:49,275 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:58:49,275 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:58:49,275 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:58:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:58:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:58:49,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:49,288 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:49,289 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:49,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2021-05-02 14:58:49,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:49,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655616779] [2021-05-02 14:58:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:49,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:58:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:49,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:58:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:49,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:58:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:49,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:49,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655616779] [2021-05-02 14:58:49,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655616779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:49,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:49,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:58:49,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587718166] [2021-05-02 14:58:49,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:58:49,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:58:49,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:58:49,443 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:49,563 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2021-05-02 14:58:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:58:49,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:58:49,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:49,569 INFO L225 Difference]: With dead ends: 74 [2021-05-02 14:58:49,569 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:58:49,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:58:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:58:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 14:58:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:58:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-05-02 14:58:49,608 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2021-05-02 14:58:49,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:49,609 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-05-02 14:58:49,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-05-02 14:58:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:58:49,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:49,611 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:49,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:58:49,611 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2021-05-02 14:58:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:49,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839963090] [2021-05-02 14:58:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:49,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:49,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023436743] [2021-05-02 14:58:49,645 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 14:58:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:49,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:58:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:49,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:58:49,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:49,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839963090] [2021-05-02 14:58:49,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:49,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023436743] [2021-05-02 14:58:49,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023436743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:49,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:49,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:58:49,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719971805] [2021-05-02 14:58:49,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:58:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:58:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:58:49,841 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:49,861 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-05-02 14:58:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:58:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:58:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:49,863 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:58:49,863 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 14:58:49,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:58:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 14:58:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 14:58:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:58:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-02 14:58:49,877 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2021-05-02 14:58:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:49,877 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-02 14:58:49,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:58:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-02 14:58:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 14:58:49,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:49,883 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:58:50,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:58:50,091 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:50,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2021-05-02 14:58:50,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:50,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772220643] [2021-05-02 14:58:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:50,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:50,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547744660] [2021-05-02 14:58:50,101 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 14:58:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:58:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:58:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:58:50,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:58:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:58:50,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:58:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772220643] [2021-05-02 14:58:50,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:58:50,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547744660] [2021-05-02 14:58:50,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547744660] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:58:50,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:58:50,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 14:58:50,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926021172] [2021-05-02 14:58:50,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:58:50,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:58:50,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:58:50,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:58:50,220 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:58:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:58:50,286 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-05-02 14:58:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:58:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-05-02 14:58:50,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:58:50,290 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:58:50,290 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 14:58:50,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:58:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 14:58:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-05-02 14:58:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:58:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-05-02 14:58:50,298 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-05-02 14:58:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:58:50,299 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-05-02 14:58:50,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:58:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-05-02 14:58:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 14:58:50,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:58:50,299 INFO L523 BasicCegarLoop]: trace histogram [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 14:58:50,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:50,500 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:58:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:58:50,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2021-05-02 14:58:50,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:58:50,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955171723] [2021-05-02 14:58:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:58:50,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:58:50,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456419219] [2021-05-02 14:58:50,529 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 14:58:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:58:50,572 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:58:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 14:58:50,586 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 14:58:50,622 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 14:58:50,622 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:58:50,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:58:50,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:58:50 BoogieIcfgContainer [2021-05-02 14:58:50,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:58:50,864 INFO L168 Benchmark]: Toolchain (without parser) took 2178.48 ms. Allocated memory is still 211.8 MB. Free memory was 175.8 MB in the beginning and 174.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:58:50,864 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 211.8 MB. Free memory is still 192.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:58:50,864 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.84 ms. Allocated memory is still 211.8 MB. Free memory was 175.6 MB in the beginning and 194.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:58:50,864 INFO L168 Benchmark]: Boogie Preprocessor took 34.67 ms. Allocated memory is still 211.8 MB. Free memory was 194.0 MB in the beginning and 192.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:58:50,864 INFO L168 Benchmark]: RCFGBuilder took 302.30 ms. Allocated memory is still 211.8 MB. Free memory was 192.5 MB in the beginning and 174.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:58:50,864 INFO L168 Benchmark]: TraceAbstraction took 1621.05 ms. Allocated memory is still 211.8 MB. Free memory was 173.6 MB in the beginning and 174.4 MB in the end (delta: -743.2 kB). Peak memory consumption was 827.6 kB. Max. memory is 8.0 GB. [2021-05-02 14:58:50,865 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 211.8 MB. Free memory is still 192.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 215.84 ms. Allocated memory is still 211.8 MB. Free memory was 175.6 MB in the beginning and 194.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.67 ms. Allocated memory is still 211.8 MB. Free memory was 194.0 MB in the beginning and 192.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 302.30 ms. Allocated memory is still 211.8 MB. Free memory was 192.5 MB in the beginning and 174.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1621.05 ms. Allocated memory is still 211.8 MB. Free memory was 173.6 MB in the beginning and 174.4 MB in the end (delta: -743.2 kB). Peak memory consumption was 827.6 kB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [\old(counter)=13, counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [\old(counter)=0, counter=0, x=1, y=2] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=1, b=2, counter=0, p=1, q=0, r=0, s=1, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=1, y=2] [L34] COND TRUE counter++<1 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=1, b=2, c=1, counter=1, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] EXPR counter++ VAL [\old(counter)=0, a=1, b=2, c=1, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=1, y=2] [L41] COND FALSE !(counter++<1) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [\old(counter)=0, a=2, b=1, c=1, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=1, y=2] [L34] COND FALSE !(counter++<1) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1565.2ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 12.3ms, AutomataDifference: 233.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 56 SDslu, 202 SDs, 0 SdLazy, 77 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 104.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.4ms AutomataMinimizationTime, 3 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 29.7ms SsaConstructionTime, 74.6ms SatisfiabilityAnalysisTime, 263.8ms InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 149 SizeOfPredicates, 3 NumberOfNonLiveVariables, 268 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 12/12 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...