/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/bresenham-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:36:13,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:36:13,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:36:13,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 13:36:13,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 13:36:13,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 13:36:13,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 13:36:13,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 13:36:13,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 13:36:13,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 13:36:13,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 13:36:13,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 13:36:13,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:36:13,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:36:13,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:36:13,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:36:13,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:36:13,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:36:13,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:36:13,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:36:13,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:36:13,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:36:13,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:36:13,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:36:13,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:36:13,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:36:13,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:36:13,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:36:13,869 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 13:36:13,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:36:13,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:36:13,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:36:13,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:36:13,900 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:36:13,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:36:13,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:36:13,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:36:13,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:36:13,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:36:13,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:36:13,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:36:13,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:36:13,902 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:36:13,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:36:13,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:36:13,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:36:13,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:36:13,903 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:36:13,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:36:13,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:36:13,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:36:13,903 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:36:13,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:36:13,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:36:13,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:36:13,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:36:13,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:36:13,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:36:14,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:36:14,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:36:14,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:36:14,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:36:14,213 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:36:14,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/bresenham-ll.c [2021-05-02 13:36:14,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4263b6dba/baf0e45712a24bbab01dc1396b3f4c52/FLAG5b915fd80 [2021-05-02 13:36:14,963 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:36:14,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham-ll.c [2021-05-02 13:36:14,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4263b6dba/baf0e45712a24bbab01dc1396b3f4c52/FLAG5b915fd80 [2021-05-02 13:36:15,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4263b6dba/baf0e45712a24bbab01dc1396b3f4c52 [2021-05-02 13:36:15,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:36:15,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:36:15,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:36:15,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:36:15,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:36:15,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8d5a01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15, skipping insertion in model container [2021-05-02 13:36:15,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,259 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:36:15,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:36:15,386 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/bresenham-ll.c[597,610] [2021-05-02 13:36:15,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:36:15,407 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:36:15,417 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/bresenham-ll.c[597,610] [2021-05-02 13:36:15,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:36:15,480 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:36:15,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15 WrapperNode [2021-05-02 13:36:15,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:36:15,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:36:15,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:36:15,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:36:15,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (1/1) ... [2021-05-02 13:36:15,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:36:15,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:36:15,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:36:15,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:36:15,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (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 13:36:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:36:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:36:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:36:15,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:36:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:36:15,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:36:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:36:15,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:36:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:36:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:36:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:36:15,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:36:15,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:36:15,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:36:15,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:36:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:36:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:36:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:36:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:36:15,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:36:15,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:36:15,779 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:36:15,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:36:15 BoogieIcfgContainer [2021-05-02 13:36:15,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:36:15,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:36:15,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:36:15,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:36:15,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:36:15" (1/3) ... [2021-05-02 13:36:15,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47958e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:36:15, skipping insertion in model container [2021-05-02 13:36:15,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:15" (2/3) ... [2021-05-02 13:36:15,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47958e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:36:15, skipping insertion in model container [2021-05-02 13:36:15,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:36:15" (3/3) ... [2021-05-02 13:36:15,788 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll.c [2021-05-02 13:36:15,794 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:36:15,798 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:36:15,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:36:15,837 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:36:15,837 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:36:15,837 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:36:15,838 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:36:15,838 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:36:15,838 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:36:15,838 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:36:15,838 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:36:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:36:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:36:15,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:15,859 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:15,860 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:15,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2052809213, now seen corresponding path program 1 times [2021-05-02 13:36:15,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:15,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764077866] [2021-05-02 13:36:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:15,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:15,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360096611] [2021-05-02 13:36:15,997 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 13:36:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:36:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:36:16,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:16,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764077866] [2021-05-02 13:36:16,189 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:16,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360096611] [2021-05-02 13:36:16,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360096611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:16,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:16,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:36:16,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065772904] [2021-05-02 13:36:16,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:36:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:36:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:36:16,205 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-05-02 13:36:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:16,306 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-02 13:36:16,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:36:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 11 [2021-05-02 13:36:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:16,312 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:36:16,312 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 13:36:16,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:36:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 13:36:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 13:36:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:36:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-02 13:36:16,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2021-05-02 13:36:16,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:16,344 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-02 13:36:16,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2021-05-02 13:36:16,344 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-02 13:36:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 13:36:16,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:16,345 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:16,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 13:36:16,564 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:16,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:16,566 INFO L82 PathProgramCache]: Analyzing trace with hash 327600201, now seen corresponding path program 1 times [2021-05-02 13:36:16,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:16,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089233408] [2021-05-02 13:36:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:16,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:16,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261455397] [2021-05-02 13:36:16,591 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 13:36:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:16,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:36:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:16,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:36:16,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:16,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089233408] [2021-05-02 13:36:16,853 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:16,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261455397] [2021-05-02 13:36:16,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261455397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:16,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:16,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:36:16,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144970795] [2021-05-02 13:36:16,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:36:16,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:16,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:36:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:36:16,855 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:36:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:16,995 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 13:36:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:36:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 13:36:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:16,996 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:36:16,997 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:36:16,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:36:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:36:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 13:36:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:36:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-05-02 13:36:17,002 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2021-05-02 13:36:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:17,002 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-05-02 13:36:17,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:36:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-05-02 13:36:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 13:36:17,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:17,003 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:17,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:17,222 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2102607563, now seen corresponding path program 1 times [2021-05-02 13:36:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:17,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245307303] [2021-05-02 13:36:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:17,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:17,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075876993] [2021-05-02 13:36:17,232 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 13:36:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:17,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:36:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:17,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:36:17,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:17,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245307303] [2021-05-02 13:36:17,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:17,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075876993] [2021-05-02 13:36:17,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075876993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:17,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:17,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:36:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076400972] [2021-05-02 13:36:17,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:36:17,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:17,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:36:17,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:36:17,378 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:36:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:17,477 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-05-02 13:36:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:36:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 13:36:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:17,478 INFO L225 Difference]: With dead ends: 48 [2021-05-02 13:36:17,478 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 13:36:17,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:36:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 13:36:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-05-02 13:36:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:36:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 13:36:17,483 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 20 [2021-05-02 13:36:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:17,483 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 13:36:17,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:36:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 13:36:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:36:17,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:17,484 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:17,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:17,702 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:17,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:17,702 INFO L82 PathProgramCache]: Analyzing trace with hash 890152080, now seen corresponding path program 1 times [2021-05-02 13:36:17,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:17,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347880700] [2021-05-02 13:36:17,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:17,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:17,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520450845] [2021-05-02 13:36:17,719 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 13:36:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:17,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:36:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:17,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:17,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:17,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:17,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:17,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:17,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:36:17,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:17,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347880700] [2021-05-02 13:36:17,988 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:17,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520450845] [2021-05-02 13:36:17,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520450845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:17,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:17,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:36:17,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956352582] [2021-05-02 13:36:17,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:36:17,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:36:17,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:36:17,989 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:36:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:18,165 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-02 13:36:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:36:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-02 13:36:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:18,167 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:36:18,167 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:36:18,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:36:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:36:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-05-02 13:36:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:36:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-05-02 13:36:18,171 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2021-05-02 13:36:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:18,171 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-05-02 13:36:18,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:36:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-05-02 13:36:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:36:18,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:18,172 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:18,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:18,391 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1671149437, now seen corresponding path program 2 times [2021-05-02 13:36:18,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:18,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193564630] [2021-05-02 13:36:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:18,399 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:18,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612976210] [2021-05-02 13:36:18,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:18,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:36:18,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:36:18,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 13:36:18,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:18,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:18,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:36:18,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:18,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193564630] [2021-05-02 13:36:18,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:18,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612976210] [2021-05-02 13:36:18,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612976210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:18,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:18,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:36:18,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230452028] [2021-05-02 13:36:18,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:36:18,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:36:18,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:36:18,759 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 13 states, 10 states have (on average 1.8) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:36:21,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:21,926 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 13:36:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:36:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-02 13:36:21,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:21,927 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:36:21,927 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:36:21,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:36:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:36:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:36:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:36:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:36:21,928 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-05-02 13:36:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:21,928 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:36:21,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:36:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:36:21,928 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:36:22,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:36:22,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:36:22,156 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-02 13:36:22,156 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-02 13:36:22,156 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-02 13:36:22,156 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:36:22,157 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L201 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: true [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point L33-1(lines 30 45) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 51) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L201 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: true [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point L48-1(line 48) no Hoare annotation was computed. [2021-05-02 13:36:22,157 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 51) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point L38(lines 38 43) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point L38-2(lines 38 43) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 21 51) the Hoare annotation is: true [2021-05-02 13:36:22,158 INFO L201 CegarLoopUtils]: At program point L30-2(lines 30 45) the Hoare annotation is: true [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point L30-3(lines 30 45) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:36:22,158 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-02 13:36:22,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:36:22 BoogieIcfgContainer [2021-05-02 13:36:22,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:36:22,165 INFO L168 Benchmark]: Toolchain (without parser) took 6916.80 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 126.6 MB in the beginning and 81.1 MB in the end (delta: 45.6 MB). Peak memory consumption was 78.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:22,166 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 162.5 MB. Free memory was 143.9 MB in the beginning and 143.8 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:36:22,166 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.67 ms. Allocated memory is still 162.5 MB. Free memory was 126.4 MB in the beginning and 145.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:22,166 INFO L168 Benchmark]: Boogie Preprocessor took 30.59 ms. Allocated memory is still 162.5 MB. Free memory was 145.1 MB in the beginning and 143.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:22,166 INFO L168 Benchmark]: RCFGBuilder took 264.69 ms. Allocated memory is still 162.5 MB. Free memory was 143.7 MB in the beginning and 128.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:22,166 INFO L168 Benchmark]: TraceAbstraction took 6383.02 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 128.0 MB in the beginning and 81.1 MB in the end (delta: 46.9 MB). Peak memory consumption was 80.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:36:22,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 162.5 MB. Free memory was 143.9 MB in the beginning and 143.8 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 231.67 ms. Allocated memory is still 162.5 MB. Free memory was 126.4 MB in the beginning and 145.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.59 ms. Allocated memory is still 162.5 MB. Free memory was 145.1 MB in the beginning and 143.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 264.69 ms. Allocated memory is still 162.5 MB. Free memory was 143.7 MB in the beginning and 128.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6383.02 ms. Allocated memory was 162.5 MB in the beginning and 195.0 MB in the end (delta: 32.5 MB). Free memory was 128.0 MB in the beginning and 81.1 MB in the end (delta: 46.9 MB). Peak memory consumption was 80.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6294.8ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 11.1ms, AutomataDifference: 3713.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 26.4ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 71 SDtfs, 81 SDslu, 406 SDs, 0 SdLazy, 738 SolverSat, 33 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3223.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 781.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=3, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 34 NumberOfFragments, 8 HoareAnnotationTreeSize, 19 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 12.3ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 15 FormulaSimplificationTreeSizeReductionInter, 8.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 49.1ms SsaConstructionTime, 110.7ms SatisfiabilityAnalysisTime, 916.6ms InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 794 SizeOfPredicates, 35 NumberOfNonLiveVariables, 613 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 14/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...