/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/lcp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:36:54,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:36:54,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:36:54,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:36:54,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:36:54,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:36:54,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:36:54,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:36:54,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:36:54,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:36:54,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:36:54,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:36:54,940 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:36:54,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:36:54,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:36:54,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:36:54,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 00:36:54,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:36:54,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:36:54,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:36:54,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:36:55,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:36:55,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:36:55,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:36:55,015 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:36:55,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:36:55,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:36:55,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:36:55,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:36:55,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:36:55,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:36:55,017 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:36:55,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:36:55,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:36:55,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:36:55,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:36:55,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:36:55,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:36:55,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:36:55,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:36:55,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:36:55,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:36:55,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:36:55,019 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:36:55,019 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:36:55,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:36:55,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:36:55,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:36:55,475 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:36:55,476 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:36:55,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/lcp.c [2021-05-03 00:36:55,598 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05c5633e/0520510a36324020aecdf2eb83d1c801/FLAGa929ba3c0 [2021-05-03 00:36:56,177 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:36:56,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/lcp.c [2021-05-03 00:36:56,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05c5633e/0520510a36324020aecdf2eb83d1c801/FLAGa929ba3c0 [2021-05-03 00:36:56,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05c5633e/0520510a36324020aecdf2eb83d1c801 [2021-05-03 00:36:56,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:36:56,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:36:56,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:36:56,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:36:56,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:36:56,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff77de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56, skipping insertion in model container [2021-05-03 00:36:56,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:36:56,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:36:56,765 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/lcp.c[515,528] [2021-05-03 00:36:56,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:36:56,852 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:36:56,864 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/lcp.c[515,528] [2021-05-03 00:36:56,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:36:56,886 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:36:56,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56 WrapperNode [2021-05-03 00:36:56,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:36:56,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:36:56,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:36:56,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:36:56,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (1/1) ... [2021-05-03 00:36:56,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:36:56,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:36:56,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:36:56,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:36:56,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (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 [2021-05-03 00:36:57,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:36:57,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:36:57,024 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:36:57,025 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:36:57,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:36:57,025 INFO L138 BoogieDeclarations]: Found implementation of procedure lcp [2021-05-03 00:36:57,025 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-05-03 00:36:57,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:36:57,025 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-05-03 00:36:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-05-03 00:36:57,025 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-05-03 00:36:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:36:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:36:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:36:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:36:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:36:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:36:57,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure lcp [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:36:57,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:36:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:36:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:36:57,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:36:57,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:36:57,403 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:36:57,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:36:57 BoogieIcfgContainer [2021-05-03 00:36:57,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:36:57,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:36:57,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:36:57,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:36:57,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:36:56" (1/3) ... [2021-05-03 00:36:57,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c944b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:36:57, skipping insertion in model container [2021-05-03 00:36:57,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:36:56" (2/3) ... [2021-05-03 00:36:57,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c944b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:36:57, skipping insertion in model container [2021-05-03 00:36:57,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:36:57" (3/3) ... [2021-05-03 00:36:57,415 INFO L111 eAbstractionObserver]: Analyzing ICFG lcp.c [2021-05-03 00:36:57,439 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:36:57,459 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:36:57,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:36:57,531 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:36:57,532 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:36:57,532 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:36:57,532 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:36:57,532 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:36:57,532 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:36:57,533 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:36:57,533 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:36:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-03 00:36:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 00:36:57,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:57,580 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:57,580 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:57,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:57,586 INFO L82 PathProgramCache]: Analyzing trace with hash -675162514, now seen corresponding path program 1 times [2021-05-03 00:36:57,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:57,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588312734] [2021-05-03 00:36:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:57,683 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:36:57,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:57,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:57,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:36:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:57,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:36:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:36:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-03 00:36:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-05-03 00:36:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 00:36:58,026 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:58,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588312734] [2021-05-03 00:36:58,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588312734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:58,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:58,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 00:36:58,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485792734] [2021-05-03 00:36:58,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 00:36:58,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 00:36:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 00:36:58,049 INFO L87 Difference]: Start difference. First operand has 49 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-03 00:36:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:58,356 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2021-05-03 00:36:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 00:36:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2021-05-03 00:36:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:58,367 INFO L225 Difference]: With dead ends: 91 [2021-05-03 00:36:58,367 INFO L226 Difference]: Without dead ends: 41 [2021-05-03 00:36:58,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 00:36:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-03 00:36:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-03 00:36:58,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-03 00:36:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-05-03 00:36:58,439 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 41 [2021-05-03 00:36:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:58,439 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-05-03 00:36:58,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-03 00:36:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-05-03 00:36:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:36:58,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:58,443 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:58,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:36:58,444 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1025657093, now seen corresponding path program 1 times [2021-05-03 00:36:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:58,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154815126] [2021-05-03 00:36:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:58,449 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:36:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:36:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:36:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:36:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-03 00:36:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-03 00:36:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 00:36:58,839 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:58,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154815126] [2021-05-03 00:36:58,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [154815126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:58,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:58,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-03 00:36:58,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516318588] [2021-05-03 00:36:58,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 00:36:58,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:58,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 00:36:58,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:36:58,846 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-03 00:36:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:36:59,341 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-05-03 00:36:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 00:36:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-05-03 00:36:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:36:59,352 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:36:59,353 INFO L226 Difference]: Without dead ends: 42 [2021-05-03 00:36:59,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:36:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-03 00:36:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-03 00:36:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-03 00:36:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-05-03 00:36:59,380 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 43 [2021-05-03 00:36:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:36:59,383 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-05-03 00:36:59,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-03 00:36:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-05-03 00:36:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 00:36:59,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:36:59,390 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:36:59,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:36:59,390 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:36:59,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:36:59,391 INFO L82 PathProgramCache]: Analyzing trace with hash -968487613, now seen corresponding path program 1 times [2021-05-03 00:36:59,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:36:59,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006749440] [2021-05-03 00:36:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:36:59,397 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:36:59,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:59,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:36:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:59,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:36:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:59,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:36:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:59,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:36:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:59,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-03 00:36:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:59,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-03 00:36:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:36:59,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 00:36:59,690 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:36:59,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006749440] [2021-05-03 00:36:59,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006749440] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:36:59,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:36:59,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:36:59,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750177936] [2021-05-03 00:36:59,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:36:59,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:36:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:36:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:36:59,695 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-03 00:37:00,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:00,261 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-05-03 00:37:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:37:00,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-05-03 00:37:00,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:00,265 INFO L225 Difference]: With dead ends: 48 [2021-05-03 00:37:00,265 INFO L226 Difference]: Without dead ends: 44 [2021-05-03 00:37:00,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-05-03 00:37:00,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-03 00:37:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-03 00:37:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 10 states have call successors, (10), 8 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-03 00:37:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-03 00:37:00,283 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 43 [2021-05-03 00:37:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:00,283 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-03 00:37:00,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-03 00:37:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-03 00:37:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-03 00:37:00,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:00,284 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:00,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:37:00,285 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:00,285 INFO L82 PathProgramCache]: Analyzing trace with hash -582845443, now seen corresponding path program 1 times [2021-05-03 00:37:00,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:00,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102401462] [2021-05-03 00:37:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:00,288 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:37:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:37:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:37:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:37:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:37:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-03 00:37:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-03 00:37:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-05-03 00:37:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:37:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 00:37:00,608 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:37:00,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102401462] [2021-05-03 00:37:00,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1102401462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:37:00,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:37:00,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-03 00:37:00,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898035367] [2021-05-03 00:37:00,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 00:37:00,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:37:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 00:37:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-03 00:37:00,610 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-03 00:37:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:37:01,252 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-05-03 00:37:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 00:37:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2021-05-03 00:37:01,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:37:01,256 INFO L225 Difference]: With dead ends: 64 [2021-05-03 00:37:01,256 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 00:37:01,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-05-03 00:37:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 00:37:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-03 00:37:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 8 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-03 00:37:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-03 00:37:01,272 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 50 [2021-05-03 00:37:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:37:01,272 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-03 00:37:01,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-03 00:37:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-03 00:37:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 00:37:01,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:37:01,274 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:37:01,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 00:37:01,275 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:37:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:37:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash 611931899, now seen corresponding path program 1 times [2021-05-03 00:37:01,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:37:01,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883366876] [2021-05-03 00:37:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:37:01,375 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (let ((.cse0 (select |v_#memory_int_11| v_lcp_~a.base_3)) (.cse1 (* v_lcp_~l~0_8 4))) (= (select .cse0 (+ .cse1 (* v_lcp_~x_4 4) v_lcp_~a.offset_3)) (select .cse0 (+ .cse1 (* v_lcp_~y_4 4) v_lcp_~a.offset_3)))) (< (+ v_lcp_~l~0_8 v_lcp_~x_4) v_lcp_~n_3) (< (+ v_lcp_~l~0_8 v_lcp_~y_4) v_lcp_~n_3)) InVars {lcp_~x=v_lcp_~x_4, lcp_~l~0=v_lcp_~l~0_8, lcp_~a.offset=v_lcp_~a.offset_3, lcp_~y=v_lcp_~y_4, lcp_~a.base=v_lcp_~a.base_3, #memory_int=|v_#memory_int_11|, lcp_~n=v_lcp_~n_3} OutVars{lcp_~x=v_lcp_~x_4, lcp_~l~0=v_lcp_~l~0_8, lcp_~a.offset=v_lcp_~a.offset_3, lcp_~y=v_lcp_~y_4, lcp_~a.base=v_lcp_~a.base_3, #memory_int=|v_#memory_int_11|, lcp_~n=v_lcp_~n_3} AuxVars[] AssignedVars[] [2021-05-03 00:37:01,391 WARN L240 tifierPushTermWalker]: treesize reduction 24, result has 89.6 percent of original size [2021-05-03 00:37:01,398 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,426 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,478 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,498 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-03 00:37:01,502 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-05-03 00:37:01,505 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,538 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-05-03 00:37:01,539 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-03 00:37:01,560 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,565 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,599 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,618 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-03 00:37:01,620 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-05-03 00:37:01,620 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,645 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 53 [2021-05-03 00:37:01,647 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-03 00:37:01,692 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,698 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:01,728 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-03 00:37:03,757 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 7 [2021-05-03 00:37:03,780 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-05-03 00:37:03,782 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:37:03,807 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-05-03 00:37:03,859 WARN L245 tifierPushTermWalker]: treesize reduction 24, result has 89.6 percent of original size 207 [2021-05-03 00:37:03,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:03,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:03,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:37:04,158 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.accelerateNestedLoops(AcceleratedInterpolationCore.java:459) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:165) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-03 00:37:04,161 INFO L168 Benchmark]: Toolchain (without parser) took 7564.84 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 157.8 MB in the beginning and 198.7 MB in the end (delta: -40.9 MB). Peak memory consumption was 117.2 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:04,161 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 174.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:37:04,161 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.77 ms. Allocated memory is still 192.9 MB. Free memory was 157.6 MB in the beginning and 175.3 MB in the end (delta: -17.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:04,161 INFO L168 Benchmark]: Boogie Preprocessor took 58.69 ms. Allocated memory is still 192.9 MB. Free memory was 175.3 MB in the beginning and 173.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:04,162 INFO L168 Benchmark]: RCFGBuilder took 458.46 ms. Allocated memory is still 192.9 MB. Free memory was 173.6 MB in the beginning and 153.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:04,162 INFO L168 Benchmark]: TraceAbstraction took 6752.15 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 198.7 MB in the end (delta: -45.7 MB). Peak memory consumption was 112.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:37:04,163 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 192.9 MB. Free memory is still 174.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.77 ms. Allocated memory is still 192.9 MB. Free memory was 157.6 MB in the beginning and 175.3 MB in the end (delta: -17.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.69 ms. Allocated memory is still 192.9 MB. Free memory was 175.3 MB in the beginning and 173.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 458.46 ms. Allocated memory is still 192.9 MB. Free memory was 173.6 MB in the beginning and 153.3 MB in the end (delta: 20.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6752.15 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 198.7 MB in the end (delta: -45.7 MB). Peak memory consumption was 112.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.accelerateNestedLoops(AcceleratedInterpolationCore.java:459) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...