/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -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/ps4-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 02:27:06,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 02:27:06,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 02:27:06,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-16 02:27:06,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 02:27:06,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 02:27:06,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 02:27:06,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 02:27:06,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 02:27:06,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 02:27:06,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 02:27:06,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 02:27:06,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 02:27:06,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 02:27:06,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 02:27:06,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 02:27:06,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 02:27:06,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 02:27:06,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 02:27:06,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 02:27:06,447 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 [2021-04-16 02:27:06,477 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 02:27:06,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 02:27:06,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-16 02:27:06,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-16 02:27:06,481 INFO L138 SettingsManager]: * Use SBE=true [2021-04-16 02:27:06,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 02:27:06,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 02:27:06,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 02:27:06,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 02:27:06,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 02:27:06,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 02:27:06,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 02:27:06,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 02:27:06,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 02:27:06,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 02:27:06,483 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 02:27:06,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 02:27:06,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 02:27:06,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 02:27:06,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 02:27:06,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 02:27:06,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 02:27:06,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-16 02:27:06,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-16 02:27:06,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-16 02:27:06,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-16 02:27:06,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-16 02:27:06,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-04-16 02:27:06,485 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 02:27:06,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 02:27:06,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 02:27:06,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 02:27:06,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 02:27:06,819 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 02:27:06,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound1.c [2021-04-16 02:27:06,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a096df0/248de82d1d574d28a06f6ccd897c622f/FLAG8b9981dfa [2021-04-16 02:27:07,311 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 02:27:07,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound1.c [2021-04-16 02:27:07,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a096df0/248de82d1d574d28a06f6ccd897c622f/FLAG8b9981dfa [2021-04-16 02:27:07,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8a096df0/248de82d1d574d28a06f6ccd897c622f [2021-04-16 02:27:07,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 02:27:07,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-16 02:27:07,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 02:27:07,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 02:27:07,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 02:27:07,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a040c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07, skipping insertion in model container [2021-04-16 02:27:07,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 02:27:07,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 02:27:07,876 WARN L226 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/ps4-ll_unwindbound1.c[458,471] [2021-04-16 02:27:07,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 02:27:07,898 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 02:27:07,908 WARN L226 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/ps4-ll_unwindbound1.c[458,471] [2021-04-16 02:27:07,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 02:27:07,924 INFO L208 MainTranslator]: Completed translation [2021-04-16 02:27:07,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07 WrapperNode [2021-04-16 02:27:07,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 02:27:07,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 02:27:07,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 02:27:07,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 02:27:07,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:07,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (1/1) ... [2021-04-16 02:27:08,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 02:27:08,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 02:27:08,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 02:27:08,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 02:27:08,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (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 [2021-04-16 02:27:08,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 02:27:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 02:27:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 02:27:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-04-16 02:27:08,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 02:27:08,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 02:27:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 02:27:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 02:27:08,071 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 02:27:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 02:27:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-04-16 02:27:08,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-04-16 02:27:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 02:27:08,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 02:27:08,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 02:27:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 02:27:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 02:27:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 02:27:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 02:27:08,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 02:27:08,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 02:27:08,347 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 02:27:08,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 02:27:08 BoogieIcfgContainer [2021-04-16 02:27:08,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 02:27:08,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 02:27:08,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 02:27:08,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 02:27:08,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 02:27:07" (1/3) ... [2021-04-16 02:27:08,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31862e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 02:27:08, skipping insertion in model container [2021-04-16 02:27:08,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 02:27:07" (2/3) ... [2021-04-16 02:27:08,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31862e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 02:27:08, skipping insertion in model container [2021-04-16 02:27:08,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 02:27:08" (3/3) ... [2021-04-16 02:27:08,370 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound1.c [2021-04-16 02:27:08,374 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-16 02:27:08,390 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 02:27:08,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 02:27:08,440 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 02:27:08,441 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-16 02:27:08,441 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-16 02:27:08,441 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 02:27:08,441 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 02:27:08,441 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 02:27:08,441 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 02:27:08,441 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 02:27:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-04-16 02:27:08,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 02:27:08,457 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 02:27:08,458 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 02:27:08,458 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 02:27:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 02:27:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-04-16 02:27:08,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 02:27:08,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687320650] [2021-04-16 02:27:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 02:27:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 02:27:08,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 02:27:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 02:27:08,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 02:27:08,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687320650] [2021-04-16 02:27:08,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 02:27:08,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 02:27:08,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061516501] [2021-04-16 02:27:08,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 02:27:08,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 02:27:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 02:27:08,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 02:27:08,678 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 02:27:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 02:27:08,751 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-04-16 02:27:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 02:27:08,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-16 02:27:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 02:27:08,758 INFO L225 Difference]: With dead ends: 41 [2021-04-16 02:27:08,759 INFO L226 Difference]: Without dead ends: 19 [2021-04-16 02:27:08,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 02:27:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-04-16 02:27:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-04-16 02:27:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 02:27:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-04-16 02:27:08,792 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-04-16 02:27:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 02:27:08,792 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-04-16 02:27:08,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 02:27:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-04-16 02:27:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 02:27:08,793 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 02:27:08,793 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 02:27:08,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 02:27:08,794 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 02:27:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 02:27:08,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-04-16 02:27:08,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 02:27:08,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362986502] [2021-04-16 02:27:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 02:27:08,810 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-04-16 02:27:08,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384050174] [2021-04-16 02:27:08,811 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 [2021-04-16 02:27:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 02:27:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-16 02:27:08,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-16 02:27:08,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,880 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,883 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,883 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,891 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,892 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,893 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,899 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 02:27:08,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:08,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-04-16 02:27:08,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 02:27:08,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 02:27:08,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,927 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:08,928 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-04-16 02:27:08,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-04-16 02:27:08,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,945 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 02:27:08,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:08,948 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-04-16 02:27:08,950 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-04-16 02:27:08,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:08,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-04-16 02:27:08,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,962 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:08,971 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-04-16 02:27:08,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,974 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,976 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,977 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,980 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,981 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,981 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,982 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,984 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,984 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,985 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:08,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 02:27:08,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362986502] [2021-04-16 02:27:08,988 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-04-16 02:27:08,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384050174] [2021-04-16 02:27:08,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 02:27:08,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-16 02:27:08,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420209328] [2021-04-16 02:27:08,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-16 02:27:08,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 02:27:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-16 02:27:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 02:27:08,992 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 02:27:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 02:27:09,013 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-04-16 02:27:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-16 02:27:09,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-16 02:27:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 02:27:09,015 INFO L225 Difference]: With dead ends: 28 [2021-04-16 02:27:09,015 INFO L226 Difference]: Without dead ends: 20 [2021-04-16 02:27:09,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-16 02:27:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-16 02:27:09,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-16 02:27:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 02:27:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-04-16 02:27:09,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-04-16 02:27:09,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 02:27:09,021 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-04-16 02:27:09,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 02:27:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-04-16 02:27:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-16 02:27:09,022 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 02:27:09,022 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 02:27:09,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-16 02:27:09,239 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 02:27:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 02:27:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-04-16 02:27:09,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 02:27:09,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093911270] [2021-04-16 02:27:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 02:27:09,256 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-04-16 02:27:09,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680239825] [2021-04-16 02:27:09,262 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 [2021-04-16 02:27:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 02:27:09,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-16 02:27:09,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-16 02:27:09,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,316 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,322 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,322 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,324 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,325 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,325 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,326 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,327 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,331 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,350 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:09,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:09,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:09,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:09,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-04-16 02:27:09,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:09,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,361 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:09,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-16 02:27:09,368 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-04-16 02:27:09,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,370 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 02:27:09,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 02:27:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 02:27:09,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093911270] [2021-04-16 02:27:09,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-04-16 02:27:09,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680239825] [2021-04-16 02:27:09,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 02:27:09,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-16 02:27:09,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983798109] [2021-04-16 02:27:09,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-16 02:27:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 02:27:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-16 02:27:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-16 02:27:09,373 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 02:27:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 02:27:09,410 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-04-16 02:27:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-16 02:27:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-04-16 02:27:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 02:27:09,411 INFO L225 Difference]: With dead ends: 30 [2021-04-16 02:27:09,411 INFO L226 Difference]: Without dead ends: 26 [2021-04-16 02:27:09,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-16 02:27:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-04-16 02:27:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-04-16 02:27:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 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) [2021-04-16 02:27:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-04-16 02:27:09,419 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-04-16 02:27:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 02:27:09,419 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-04-16 02:27:09,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 02:27:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-04-16 02:27:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-16 02:27:09,420 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 02:27:09,420 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 02:27:09,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-16 02:27:09,637 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 02:27:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 02:27:09,638 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-04-16 02:27:09,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 02:27:09,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757191321] [2021-04-16 02:27:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 02:27:09,648 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-04-16 02:27:09,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364554079] [2021-04-16 02:27:09,648 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 [2021-04-16 02:27:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 02:27:09,707 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 02:27:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 02:27:09,723 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 02:27:09,754 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-16 02:27:09,754 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 02:27:09,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-16 02:27:10,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 02:27:10 BoogieIcfgContainer [2021-04-16 02:27:10,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 02:27:10,016 INFO L168 Benchmark]: Toolchain (without parser) took 2284.45 ms. Allocated memory is still 203.4 MB. Free memory was 168.8 MB in the beginning and 185.6 MB in the end (delta: -16.8 MB). Peak memory consumption was 102.7 MB. Max. memory is 8.0 GB. [2021-04-16 02:27:10,016 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 203.4 MB. Free memory was 185.6 MB in the beginning and 185.5 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 02:27:10,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.69 ms. Allocated memory is still 203.4 MB. Free memory was 168.5 MB in the beginning and 158.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 02:27:10,017 INFO L168 Benchmark]: Boogie Preprocessor took 75.51 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 186.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-04-16 02:27:10,017 INFO L168 Benchmark]: RCFGBuilder took 346.40 ms. Allocated memory is still 203.4 MB. Free memory was 186.1 MB in the beginning and 171.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-04-16 02:27:10,018 INFO L168 Benchmark]: TraceAbstraction took 1665.18 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 185.6 MB in the end (delta: -14.7 MB). Peak memory consumption was 104.9 MB. Max. memory is 8.0 GB. [2021-04-16 02:27:10,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 203.4 MB. Free memory was 185.6 MB in the beginning and 185.5 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 190.69 ms. Allocated memory is still 203.4 MB. Free memory was 168.5 MB in the beginning and 158.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.51 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 186.5 MB in the end (delta: -27.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 346.40 ms. Allocated memory is still 203.4 MB. Free memory was 186.1 MB in the beginning and 171.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1665.18 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 185.6 MB in the end (delta: -14.7 MB). Peak memory consumption was 104.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=2, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=2, x=0, y=0] [L27] COND TRUE counter++<1 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=2, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=2, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=2, x=1, y=1] [L27] COND FALSE !(counter++<1) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1533.8ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 7.9ms, AutomataDifference: 159.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 62 SDtfs, 12 SDslu, 88 SDs, 0 SdLazy, 41 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.1ms SsaConstructionTime, 83.0ms SatisfiabilityAnalysisTime, 294.6ms InterpolantComputationTime, 55 NumberOfCodeBlocks, 55 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 2 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...