/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:10:56,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:10:56,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:10:56,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:10:56,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:10:56,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:10:56,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:10:56,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:10:56,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:10:56,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:10:56,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:10:56,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:10:56,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:10:56,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:10:56,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:10:56,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:10:56,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:10:56,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:10:56,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:10:56,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:10:56,936 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 15:10:56,963 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:10:56,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:10:56,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:10:56,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:10:56,966 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:10:56,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:10:56,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:10:56,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:10:56,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:10:56,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:10:56,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:10:56,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:10:56,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:10:56,968 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:10:56,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:10:56,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:10:56,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:10:56,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:10:56,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:10:56,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:10:56,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:10:56,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:10:56,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:10:56,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:10:56,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:10:56,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:10:56,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:10:56,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:10:56,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:10:57,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:10:57,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:10:57,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:10:57,245 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:10:57,245 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:10:57,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-05-02 15:10:57,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b7b8367/c37f81c7a4b146c38106488c8776b952/FLAG32efc2697 [2021-05-02 15:10:57,664 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:10:57,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound2.c [2021-05-02 15:10:57,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b7b8367/c37f81c7a4b146c38106488c8776b952/FLAG32efc2697 [2021-05-02 15:10:58,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b7b8367/c37f81c7a4b146c38106488c8776b952 [2021-05-02 15:10:58,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:10:58,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:10:58,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:10:58,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:10:58,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:10:58,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2262d3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58, skipping insertion in model container [2021-05-02 15:10:58,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:10:58,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:10:58,245 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2021-05-02 15:10:58,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:10:58,280 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:10:58,303 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound2.c[524,537] [2021-05-02 15:10:58,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:10:58,326 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:10:58,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58 WrapperNode [2021-05-02 15:10:58,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:10:58,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:10:58,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:10:58,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:10:58,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,387 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (1/1) ... [2021-05-02 15:10:58,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:10:58,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:10:58,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:10:58,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:10:58,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (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 15:10:58,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:10:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:10:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:10:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:10:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:10:58,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:10:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:10:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:10:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:10:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:10:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:10:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:10:58,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:10:58,800 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:10:58,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:10:58 BoogieIcfgContainer [2021-05-02 15:10:58,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:10:58,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:10:58,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:10:58,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:10:58,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:10:58" (1/3) ... [2021-05-02 15:10:58,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37135e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:10:58, skipping insertion in model container [2021-05-02 15:10:58,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:10:58" (2/3) ... [2021-05-02 15:10:58,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37135e03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:10:58, skipping insertion in model container [2021-05-02 15:10:58,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:10:58" (3/3) ... [2021-05-02 15:10:58,821 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound2.c [2021-05-02 15:10:58,825 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:10:58,827 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:10:58,837 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:10:58,866 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:10:58,866 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:10:58,866 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:10:58,867 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:10:58,867 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:10:58,867 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:10:58,867 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:10:58,867 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:10:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:10:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 15:10:58,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:10:58,905 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 15:10:58,905 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:10:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:10:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 15:10:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:10:58,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912052360] [2021-05-02 15:10:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:10:59,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:10:59,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409762051] [2021-05-02 15:10:59,031 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 15:10:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:10:59,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:10:59,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:10:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 15:10:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:10:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912052360] [2021-05-02 15:10:59,180 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:10:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409762051] [2021-05-02 15:10:59,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409762051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:10:59,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:10:59,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:10:59,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900790623] [2021-05-02 15:10:59,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:10:59,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:10:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:10:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:10:59,193 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:10:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:10:59,204 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-02 15:10:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:10:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 15:10:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:10:59,209 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:10:59,209 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:10:59,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:10:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:10:59,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:10:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:10:59,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 15:10:59,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 15:10:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:10:59,233 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 15:10:59,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:10:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 15:10:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:10:59,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:10:59,234 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 15:10:59,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:10:59,451 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:10:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:10:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 15:10:59,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:10:59,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59305940] [2021-05-02 15:10:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:10:59,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:10:59,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073321144] [2021-05-02 15:10:59,463 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 15:10:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:10:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:10:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:10:59,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:59,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:59,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:59,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:59,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:10:59,733 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 15:10:59,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:10:59,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59305940] [2021-05-02 15:10:59,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:10:59,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073321144] [2021-05-02 15:10:59,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073321144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:10:59,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:10:59,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:10:59,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386148752] [2021-05-02 15:10:59,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:10:59,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:10:59,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:10:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:10:59,740 INFO L87 Difference]: Start difference. First operand 25 states and 29 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 15:10:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:10:59,758 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 15:10:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:10:59,759 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 15:10:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:10:59,764 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:10:59,764 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:10:59,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:10:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:10:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:10:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:10:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 15:10:59,774 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 15:10:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:10:59,774 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 15:10:59,774 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 15:10:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 15:10:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:10:59,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:10:59,775 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 15:10:59,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:10:59,991 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:10:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:10:59,992 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 15:10:59,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:10:59,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628052931] [2021-05-02 15:10:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:00,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:00,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125524987] [2021-05-02 15:11:00,004 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 15:11:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:11:00,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:11:00,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:00,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:00,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:00,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:00,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:11:00,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:11:00,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628052931] [2021-05-02 15:11:00,259 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:11:00,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125524987] [2021-05-02 15:11:00,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125524987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:11:00,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:11:00,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:11:00,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790925874] [2021-05-02 15:11:00,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:11:00,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:11:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:11:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:11:00,260 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:11:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:11:09,152 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 15:11:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:11:09,152 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:11:09,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:11:09,154 INFO L225 Difference]: With dead ends: 37 [2021-05-02 15:11:09,154 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:11:09,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:11:09,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:11:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 15:11:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:11:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 15:11:09,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 15:11:09,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:11:09,160 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 15:11:09,160 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:11:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 15:11:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 15:11:09,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:11:09,161 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 15:11:09,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:09,377 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:11:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:11:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 15:11:09,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:11:09,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284945024] [2021-05-02 15:11:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:09,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:09,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39216288] [2021-05-02 15:11:09,387 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 15:11:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:11:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:11:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:09,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:11:09,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:11:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284945024] [2021-05-02 15:11:09,768 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:11:09,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39216288] [2021-05-02 15:11:09,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39216288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:11:09,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:11:09,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:11:09,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692056489] [2021-05-02 15:11:09,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:11:09,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:11:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:11:09,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:11:09,770 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:11:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:11:25,806 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 15:11:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:11:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 15:11:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:11:25,808 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:11:25,808 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:11:25,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:11:25,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:11:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:11:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:11:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 15:11:25,814 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-05-02 15:11:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:11:25,815 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 15:11:25,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:11:25,815 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 15:11:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:11:25,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:11:25,815 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:11:26,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:26,029 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:11:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:11:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 15:11:26,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:11:26,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030774241] [2021-05-02 15:11:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:26,038 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:26,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964264819] [2021-05-02 15:11:26,038 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 15:11:26,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:11:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:11:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:26,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:11:26,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:11:26,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030774241] [2021-05-02 15:11:26,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:11:26,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964264819] [2021-05-02 15:11:26,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964264819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:11:26,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:11:26,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:11:26,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168703727] [2021-05-02 15:11:26,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:11:26,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:11:26,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:11:26,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:11:26,189 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:11:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:11:26,220 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-05-02 15:11:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:11:26,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:11:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:11:26,222 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:11:26,222 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:11:26,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:11:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:11:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 15:11:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:11:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-05-02 15:11:26,228 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-05-02 15:11:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:11:26,228 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-05-02 15:11:26,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:11:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-05-02 15:11:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:11:26,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:11:26,229 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:11:26,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:26,446 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:11:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:11:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1082012512, now seen corresponding path program 1 times [2021-05-02 15:11:26,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:11:26,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193832632] [2021-05-02 15:11:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:26,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:26,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189381419] [2021-05-02 15:11:26,460 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 15:11:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:11:26,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:11:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:26,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:26,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:11:29,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:11:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193832632] [2021-05-02 15:11:29,987 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:11:29,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189381419] [2021-05-02 15:11:29,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189381419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:11:29,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:11:29,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:11:29,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584460939] [2021-05-02 15:11:29,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:11:29,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:11:29,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:11:29,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2021-05-02 15:11:29,988 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:11:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:11:51,168 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2021-05-02 15:11:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:11:51,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:11:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:11:51,169 INFO L225 Difference]: With dead ends: 56 [2021-05-02 15:11:51,169 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 15:11:51,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3378.4ms TimeCoverageRelationStatistics Valid=41, Invalid=168, Unknown=1, NotChecked=0, Total=210 [2021-05-02 15:11:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 15:11:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 15:11:51,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:11:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-05-02 15:11:51,175 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 32 [2021-05-02 15:11:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:11:51,176 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-05-02 15:11:51,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:11:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-05-02 15:11:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 15:11:51,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:11:51,176 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 15:11:51,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:11:51,391 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:11:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:11:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1437947422, now seen corresponding path program 1 times [2021-05-02 15:11:51,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:11:51,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311472500] [2021-05-02 15:11:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:11:51,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:11:51,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085264830] [2021-05-02 15:11:51,419 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 15:11:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:11:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:11:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:11:51,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:51,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:51,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:11:51,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:13,278 WARN L205 SmtUtils]: Spent 9.05 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 15:12:46,917 WARN L205 SmtUtils]: Spent 25.59 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 15:12:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:46,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:12:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:12:47,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:12:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311472500] [2021-05-02 15:12:47,023 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:12:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085264830] [2021-05-02 15:12:47,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085264830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:12:47,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:12:47,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:12:47,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691952822] [2021-05-02 15:12:47,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:12:47,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:12:47,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:12:47,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 15:12:47,025 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:13:38,586 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 15:14:11,827 WARN L205 SmtUtils]: Spent 8.05 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 15:14:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:14:58,849 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-05-02 15:14:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:14:58,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 15:14:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:14:58,851 INFO L225 Difference]: With dead ends: 58 [2021-05-02 15:14:58,851 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:14:58,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 103550.6ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 15:14:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:14:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 15:14:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:14:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-05-02 15:14:58,856 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 32 [2021-05-02 15:14:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:14:58,856 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-05-02 15:14:58,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:14:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-05-02 15:14:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:14:58,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:14:58,857 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:14:59,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:59,075 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:14:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:14:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-02 15:14:59,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:14:59,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083192713] [2021-05-02 15:14:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:14:59,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:14:59,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287834925] [2021-05-02 15:14:59,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:14:59,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:14:59,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 15:14:59,181 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:14:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:14:59,232 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:14:59,304 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:14:59,304 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:14:59,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:14:59,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:14:59 BoogieIcfgContainer [2021-05-02 15:14:59,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:14:59,545 INFO L168 Benchmark]: Toolchain (without parser) took 241471.62 ms. Allocated memory is still 173.0 MB. Free memory was 137.3 MB in the beginning and 117.5 MB in the end (delta: 19.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:59,545 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 173.0 MB. Free memory is still 153.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:14:59,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.56 ms. Allocated memory is still 173.0 MB. Free memory was 137.1 MB in the beginning and 127.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:59,545 INFO L168 Benchmark]: Boogie Preprocessor took 87.93 ms. Allocated memory is still 173.0 MB. Free memory was 127.3 MB in the beginning and 156.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:59,545 INFO L168 Benchmark]: RCFGBuilder took 385.58 ms. Allocated memory is still 173.0 MB. Free memory was 156.8 MB in the beginning and 141.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:59,545 INFO L168 Benchmark]: TraceAbstraction took 240742.24 ms. Allocated memory is still 173.0 MB. Free memory was 140.5 MB in the beginning and 117.5 MB in the end (delta: 23.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:14:59,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 173.0 MB. Free memory is still 153.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.56 ms. Allocated memory is still 173.0 MB. Free memory was 137.1 MB in the beginning and 127.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.93 ms. Allocated memory is still 173.0 MB. Free memory was 127.3 MB in the beginning and 156.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 385.58 ms. Allocated memory is still 173.0 MB. Free memory was 156.8 MB in the beginning and 141.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 240742.24 ms. Allocated memory is still 173.0 MB. Free memory was 140.5 MB in the beginning and 117.5 MB in the end (delta: 23.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=18, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(counter)=0, A=7, counter=0, R=3] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=3] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, R=3, r=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, R=3, r=2, u=7, v=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=1, R=3, r=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, R=3, r=2, u=7, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=7, counter=1, R=3, r=1, u=7, v=3] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, R=3, r=1, u=7, v=3] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=2, r=1, R=3, u=7, v=3] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=2, r=1, R=3, u=7, v=3] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=7, counter=2, r=-2, R=3, u=7, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=3, counter++=2, R=3, r=-2, u=7, v=5] [L34] COND FALSE !(counter++<2) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 240642.0ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 21.7ms, AutomataDifference: 178031.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 174 SDtfs, 95 SDslu, 609 SDs, 0 SdLazy, 455 SolverSat, 29 SolverUnsat, 48 SolverUnknown, 0 SolverNotchecked, 129186.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 107231.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=7, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.6ms AutomataMinimizationTime, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 117.7ms SsaConstructionTime, 301.7ms SatisfiabilityAnalysisTime, 59728.1ms InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 186 ConstructedInterpolants, 17 QuantifiedInterpolants, 1391 SizeOfPredicates, 19 NumberOfNonLiveVariables, 956 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 21/44 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...