/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 08:17:39,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 08:17:39,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 08:17:39,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 08:17:39,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 08:17:39,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 08:17:39,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 08:17:39,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 08:17:39,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 08:17:39,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 08:17:39,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 08:17:39,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 08:17:39,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 08:17:39,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 08:17:39,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 08:17:39,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 08:17:39,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 08:17:39,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 08:17:39,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 08:17:39,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 08:17:39,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 08:17:39,527 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 08:17:39,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 08:17:39,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 08:17:39,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 08:17:39,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 08:17:39,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 08:17:39,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 08:17:39,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 08:17:39,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 08:17:39,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 08:17:39,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 08:17:39,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 08:17:39,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 08:17:39,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 08:17:39,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 08:17:39,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 08:17:39,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 08:17:39,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 08:17:39,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 08:17:39,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 08:17:39,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 08:17:39,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 08:17:39,531 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 08:17:39,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 08:17:39,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 08:17:39,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 08:17:39,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 08:17:39,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 08:17:39,793 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 08:17:39,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max.c [2021-05-01 08:17:39,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ffea1e5a/db44cee35c78458d93ce4e6469d90e37/FLAG7bcdf9eb8 [2021-05-01 08:17:40,269 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 08:17:40,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max.c [2021-05-01 08:17:40,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ffea1e5a/db44cee35c78458d93ce4e6469d90e37/FLAG7bcdf9eb8 [2021-05-01 08:17:40,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ffea1e5a/db44cee35c78458d93ce4e6469d90e37 [2021-05-01 08:17:40,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 08:17:40,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 08:17:40,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 08:17:40,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 08:17:40,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 08:17:40,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b16b0a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40, skipping insertion in model container [2021-05-01 08:17:40,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 08:17:40,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 08:17:40,459 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/elimination_max.c[485,498] [2021-05-01 08:17:40,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:17:40,495 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 08:17:40,507 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/elimination_max.c[485,498] [2021-05-01 08:17:40,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 08:17:40,531 INFO L208 MainTranslator]: Completed translation [2021-05-01 08:17:40,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40 WrapperNode [2021-05-01 08:17:40,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 08:17:40,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 08:17:40,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 08:17:40,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 08:17:40,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (1/1) ... [2021-05-01 08:17:40,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 08:17:40,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 08:17:40,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 08:17:40,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 08:17:40,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (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 [2021-05-01 08:17:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 08:17:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 08:17:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 08:17:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 08:17:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 08:17:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 08:17:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-05-01 08:17:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-05-01 08:17:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-05-01 08:17:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 08:17:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 08:17:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 08:17:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 08:17:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 08:17:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 08:17:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 08:17:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 08:17:40,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-05-01 08:17:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-05-01 08:17:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 08:17:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 08:17:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 08:17:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 08:17:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 08:17:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 08:17:41,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 08:17:41,040 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 08:17:41,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:17:41 BoogieIcfgContainer [2021-05-01 08:17:41,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 08:17:41,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 08:17:41,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 08:17:41,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 08:17:41,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 08:17:40" (1/3) ... [2021-05-01 08:17:41,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1390a890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:17:41, skipping insertion in model container [2021-05-01 08:17:41,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 08:17:40" (2/3) ... [2021-05-01 08:17:41,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1390a890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 08:17:41, skipping insertion in model container [2021-05-01 08:17:41,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 08:17:41" (3/3) ... [2021-05-01 08:17:41,048 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max.c [2021-05-01 08:17:41,060 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 08:17:41,064 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 08:17:41,078 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 08:17:41,095 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 08:17:41,095 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 08:17:41,096 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 08:17:41,096 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 08:17:41,096 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 08:17:41,096 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 08:17:41,096 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 08:17:41,096 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 08:17:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-01 08:17:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 08:17:41,120 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:17:41,121 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:17:41,122 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:17:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:17:41,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1951153279, now seen corresponding path program 1 times [2021-05-01 08:17:41,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:17:41,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745833636] [2021-05-01 08:17:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:17:41,211 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:17:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:41,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,367 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:17:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:41,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:17:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:41,473 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:17:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:41,493 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,493 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-05-01 08:17:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:41,501 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:41,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:17:41,510 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:17:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745833636] [2021-05-01 08:17:41,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1745833636] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:17:41,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:17:41,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 08:17:41,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685792870] [2021-05-01 08:17:41,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 08:17:41,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:17:41,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 08:17:41,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 08:17:41,536 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:17:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:17:41,795 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2021-05-01 08:17:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-01 08:17:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-01 08:17:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:17:41,806 INFO L225 Difference]: With dead ends: 71 [2021-05-01 08:17:41,806 INFO L226 Difference]: Without dead ends: 34 [2021-05-01 08:17:41,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 08:17:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-01 08:17:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-01 08:17:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 08:17:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-01 08:17:41,870 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2021-05-01 08:17:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:17:41,871 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-01 08:17:41,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:17:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-01 08:17:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 08:17:41,874 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:17:41,875 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:17:41,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 08:17:41,875 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:17:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:17:41,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1957169217, now seen corresponding path program 1 times [2021-05-01 08:17:41,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:17:41,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493248773] [2021-05-01 08:17:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:17:41,884 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:17:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-05-01 08:17:42,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 08:17:42,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 08:17:42,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:17:42,055 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,056 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:17:42,063 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,064 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:17:42,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,078 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:17:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:17:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:17:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-05-01 08:17:42,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-05-01 08:17:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,197 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:17:42,198 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:17:42,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493248773] [2021-05-01 08:17:42,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493248773] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:17:42,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:17:42,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-01 08:17:42,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056657802] [2021-05-01 08:17:42,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-01 08:17:42,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:17:42,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-01 08:17:42,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-01 08:17:42,201 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:17:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:17:42,644 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-05-01 08:17:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-01 08:17:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-01 08:17:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:17:42,646 INFO L225 Difference]: With dead ends: 40 [2021-05-01 08:17:42,646 INFO L226 Difference]: Without dead ends: 38 [2021-05-01 08:17:42,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-01 08:17:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-01 08:17:42,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-01 08:17:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 08:17:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-01 08:17:42,667 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 29 [2021-05-01 08:17:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:17:42,669 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-01 08:17:42,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 08:17:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-01 08:17:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-01 08:17:42,670 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 08:17:42,670 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 08:17:42,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 08:17:42,670 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 08:17:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 08:17:42,671 INFO L82 PathProgramCache]: Analyzing trace with hash -718145150, now seen corresponding path program 1 times [2021-05-01 08:17:42,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 08:17:42,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928250758] [2021-05-01 08:17:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 08:17:42,674 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 08:17:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,733 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,734 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-05-01 08:17:42,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 08:17:42,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,752 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-01 08:17:42,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-05-01 08:17:42,774 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-05-01 08:17:42,785 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 08:17:42,796 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,796 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:17:42,803 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,803 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 08:17:42,812 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 08:17:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-01 08:17:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-01 08:17:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-05-01 08:17:42,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-05-01 08:17:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,910 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-01 08:17:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 08:17:42,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 08:17:42,916 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 08:17:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 08:17:42,917 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 08:17:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928250758] [2021-05-01 08:17:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928250758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 08:17:42,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 08:17:42,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-01 08:17:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854870802] [2021-05-01 08:17:42,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-01 08:17:42,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 08:17:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-01 08:17:42,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-01 08:17:42,919 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-01 08:17:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 08:17:43,286 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-01 08:17:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-01 08:17:43,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-01 08:17:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 08:17:43,287 INFO L225 Difference]: With dead ends: 38 [2021-05-01 08:17:43,287 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 08:17:43,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-01 08:17:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 08:17:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 08:17:43,288 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) [2021-05-01 08:17:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 08:17:43,289 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-01 08:17:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 08:17:43,289 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 08:17:43,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-01 08:17:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 08:17:43,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 08:17:43,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 08:17:43,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-01 08:17:43,683 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-01 08:17:43,683 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-01 08:17:43,683 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-01 08:17:43,683 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#t~string6.offset)| |#t~string6.offset|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |#t~string7.offset| |old(#t~string7.offset)|) (= |old(#t~string7.base)| |#t~string7.base|) (= |old(#valid)| |#valid|)) [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-05-01 08:17:43,684 INFO L201 CegarLoopUtils]: At program point L8-2(lines 7 9) the Hoare annotation is: true [2021-05-01 08:17:43,685 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notEXIT(lines 7 9) the Hoare annotation is: true [2021-05-01 08:17:43,685 INFO L194 CegarLoopUtils]: At program point L35-2(lines 25 37) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)))) [2021-05-01 08:17:43,685 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 16 51) the Hoare annotation is: true [2021-05-01 08:17:43,685 INFO L194 CegarLoopUtils]: At program point L25-2(lines 25 37) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)))) [2021-05-01 08:17:43,685 INFO L194 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2021-05-01 08:17:43,685 INFO L194 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2021-05-01 08:17:43,686 INFO L194 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (<= 0 |main_#t~mem19|) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)) (= |main_#t~mem18| 0))) [2021-05-01 08:17:43,686 INFO L194 CegarLoopUtils]: At program point L46-1(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (<= 0 |main_#t~mem19|) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)) (= |main_#t~mem18| 0))) [2021-05-01 08:17:43,686 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 16 51) the Hoare annotation is: true [2021-05-01 08:17:43,686 INFO L194 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)))) [2021-05-01 08:17:43,686 INFO L194 CegarLoopUtils]: At program point L42-1(line 42) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)))) [2021-05-01 08:17:43,686 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 16 51) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2021-05-01 08:17:43,686 INFO L194 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2021-05-01 08:17:43,686 INFO L194 CegarLoopUtils]: At program point L20-1(line 20) the Hoare annotation is: (= ((as const (Array Int Int)) 0) (select |#memory_int| |main_#t~malloc9.base|)) [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= |main_#t~mem15| 0) (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)) (= |main_#t~mem16| 0))) [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point L45-2(lines 45 47) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)))) [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point L43-1(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= |main_#t~mem15| 0) (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)) (= |main_#t~mem16| 0))) [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point L45-3(lines 45 47) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)))) [2021-05-01 08:17:43,687 INFO L201 CegarLoopUtils]: At program point L45-4(lines 45 47) the Hoare annotation is: true [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point L35(lines 35 36) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc9.base|)))) [2021-05-01 08:17:43,687 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point L11(line 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point L11-1(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 08:17:43,687 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 10 12) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 08:17:43,688 INFO L194 CegarLoopUtils]: At program point L11-3(lines 10 12) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 08:17:43,688 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 08:17:43,688 INFO L194 CegarLoopUtils]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2021-05-01 08:17:43,688 INFO L194 CegarLoopUtils]: At program point #Ultimate.meminitEXIT(line -1) the Hoare annotation is: (= ((as const (Array Int Int)) 0) (select |#memory_int| |#Ultimate.meminit_#ptr.base|)) [2021-05-01 08:17:43,688 INFO L194 CegarLoopUtils]: At program point #Ultimate.meminitFINAL(line -1) the Hoare annotation is: (= ((as const (Array Int Int)) 0) (select |#memory_int| |#Ultimate.meminit_#ptr.base|)) [2021-05-01 08:17:43,695 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:240) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:559) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:256) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:215) 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) [2021-05-01 08:17:43,702 INFO L168 Benchmark]: Toolchain (without parser) took 3404.96 ms. Allocated memory was 208.7 MB in the beginning and 334.5 MB in the end (delta: 125.8 MB). Free memory was 174.6 MB in the beginning and 225.9 MB in the end (delta: -51.3 MB). Peak memory consumption was 75.6 MB. Max. memory is 8.0 GB. [2021-05-01 08:17:43,703 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 208.7 MB. Free memory is still 191.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 08:17:43,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.87 ms. Allocated memory is still 208.7 MB. Free memory was 174.4 MB in the beginning and 164.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-01 08:17:43,703 INFO L168 Benchmark]: Boogie Preprocessor took 113.50 ms. Allocated memory is still 208.7 MB. Free memory was 164.5 MB in the beginning and 192.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:17:43,703 INFO L168 Benchmark]: RCFGBuilder took 394.27 ms. Allocated memory is still 208.7 MB. Free memory was 191.8 MB in the beginning and 174.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-01 08:17:43,704 INFO L168 Benchmark]: TraceAbstraction took 2658.51 ms. Allocated memory was 208.7 MB in the beginning and 334.5 MB in the end (delta: 125.8 MB). Free memory was 174.0 MB in the beginning and 225.9 MB in the end (delta: -51.9 MB). Peak memory consumption was 75.4 MB. Max. memory is 8.0 GB. [2021-05-01 08:17:43,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 208.7 MB. Free memory is still 191.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 231.87 ms. Allocated memory is still 208.7 MB. Free memory was 174.4 MB in the beginning and 164.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 113.50 ms. Allocated memory is still 208.7 MB. Free memory was 164.5 MB in the beginning and 192.3 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 394.27 ms. Allocated memory is still 208.7 MB. Free memory was 191.8 MB in the beginning and 174.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2658.51 ms. Allocated memory was 208.7 MB in the beginning and 334.5 MB in the end (delta: 125.8 MB). Free memory was 174.0 MB in the beginning and 225.9 MB in the end (delta: -51.9 MB). Peak memory consumption was 75.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: 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 7 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2196.7ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 18.1ms, AutomataDifference: 1106.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 392.1ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 88 SDtfs, 121 SDslu, 150 SDs, 0 SdLazy, 424 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 424.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 673.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 39 LocationsWithAnnotation, 68 PreInvPairs, 95 NumberOfFragments, 296 HoareAnnotationTreeSize, 68 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 132.1ms HoareSimplificationTime, 39 FomulaSimplificationsInter, 459 FormulaSimplificationTreeSizeReductionInter, 242.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:240) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...