/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-a47f07a [2021-04-16 03:15:25,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-16 03:15:25,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-16 03:15:25,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-16 03:15:25,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-16 03:15:25,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-16 03:15:25,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-16 03:15:25,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-16 03:15:25,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-16 03:15:25,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-16 03:15:25,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-16 03:15:25,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-16 03:15:25,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-16 03:15:25,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-16 03:15:25,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-16 03:15:25,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-16 03:15:25,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-16 03:15:25,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-16 03:15:25,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-16 03:15:25,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-16 03:15:25,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-16 03:15:25,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-16 03:15:25,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-16 03:15:25,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-16 03:15:25,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-16 03:15:25,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-16 03:15:25,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-16 03:15:25,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-16 03:15:25,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-04-16 03:15:25,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-16 03:15:25,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-16 03:15:25,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-16 03:15:25,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-16 03:15:25,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-16 03:15:25,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-16 03:15:25,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-16 03:15:25,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-16 03:15:25,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-16 03:15:25,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-16 03:15:25,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-16 03:15:25,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-16 03:15:25,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-16 03:15:25,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-16 03:15:25,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-16 03:15:25,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-16 03:15:25,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-16 03:15:25,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-16 03:15:25,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 03:15:25,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-16 03:15:25,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-16 03:15:25,975 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-04-16 03:15:25,975 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-16 03:15:26,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-16 03:15:26,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-16 03:15:26,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-16 03:15:26,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-04-16 03:15:26,478 INFO L275 PluginConnector]: CDTParser initialized [2021-04-16 03:15:26,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2021-04-16 03:15:26,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e50387e/37e5f8c37ca542a99f1032dc966f7706/FLAGfd06056d7 [2021-04-16 03:15:27,135 INFO L306 CDTParser]: Found 1 translation units. [2021-04-16 03:15:27,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2021-04-16 03:15:27,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e50387e/37e5f8c37ca542a99f1032dc966f7706/FLAGfd06056d7 [2021-04-16 03:15:27,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3e50387e/37e5f8c37ca542a99f1032dc966f7706 [2021-04-16 03:15:27,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-16 03:15:27,487 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-04-16 03:15:27,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-04-16 03:15:27,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-04-16 03:15:27,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-04-16 03:15:27,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff46c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27, skipping insertion in model container [2021-04-16 03:15:27,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-04-16 03:15:27,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-04-16 03:15:27,659 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c[320,333] [2021-04-16 03:15:27,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 03:15:27,700 INFO L203 MainTranslator]: Completed pre-run [2021-04-16 03:15:27,713 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c[320,333] [2021-04-16 03:15:27,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-04-16 03:15:27,734 INFO L208 MainTranslator]: Completed translation [2021-04-16 03:15:27,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27 WrapperNode [2021-04-16 03:15:27,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-04-16 03:15:27,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-16 03:15:27,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-16 03:15:27,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-16 03:15:27,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... [2021-04-16 03:15:27,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-16 03:15:27,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-16 03:15:27,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-16 03:15:27,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-16 03:15:27,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-16 03:15:27,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-04-16 03:15:27,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-16 03:15:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-04-16 03:15:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-04-16 03:15:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-04-16 03:15:27,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-04-16 03:15:27,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-04-16 03:15:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-04-16 03:15:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-04-16 03:15:27,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-04-16 03:15:27,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-04-16 03:15:27,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-04-16 03:15:27,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-04-16 03:15:27,942 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-04-16 03:15:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-04-16 03:15:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-04-16 03:15:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-04-16 03:15:27,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-16 03:15:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-04-16 03:15:27,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-04-16 03:15:27,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-04-16 03:15:28,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-16 03:15:28,338 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-04-16 03:15:28,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 03:15:28 BoogieIcfgContainer [2021-04-16 03:15:28,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-16 03:15:28,342 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-04-16 03:15:28,342 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-04-16 03:15:28,343 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-04-16 03:15:28,346 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 03:15:28" (1/1) ... [2021-04-16 03:15:28,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 16.04 03:15:28 BasicIcfg [2021-04-16 03:15:28,368 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-04-16 03:15:28,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-16 03:15:28,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-16 03:15:28,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-16 03:15:28,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.04 03:15:27" (1/4) ... [2021-04-16 03:15:28,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d95ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 03:15:28, skipping insertion in model container [2021-04-16 03:15:28,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.04 03:15:27" (2/4) ... [2021-04-16 03:15:28,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d95ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.04 03:15:28, skipping insertion in model container [2021-04-16 03:15:28,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.04 03:15:28" (3/4) ... [2021-04-16 03:15:28,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48d95ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 03:15:28, skipping insertion in model container [2021-04-16 03:15:28,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 16.04 03:15:28" (4/4) ... [2021-04-16 03:15:28,378 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-2.cJordan [2021-04-16 03:15:28,384 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-04-16 03:15:28,392 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-16 03:15:28,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-04-16 03:15:28,438 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-16 03:15:28,438 INFO L377 AbstractCegarLoop]: Hoare is false [2021-04-16 03:15:28,439 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-04-16 03:15:28,439 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-16 03:15:28,439 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-16 03:15:28,439 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-16 03:15:28,439 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-16 03:15:28,439 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-16 03:15:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-04-16 03:15:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 03:15:28,465 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 03:15:28,467 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 03:15:28,467 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 03:15:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 03:15:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1381876394, now seen corresponding path program 1 times [2021-04-16 03:15:28,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 03:15:28,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859876329] [2021-04-16 03:15:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 03:15:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 03:15:28,733 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 03:15:28,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 03:15:28,738 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 03:15:28,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 03:15:28,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-04-16 03:15:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-16 03:15:28,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-16 03:15:28,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-16 03:15:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-16 03:15:28,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859876329] [2021-04-16 03:15:28,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-16 03:15:28,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-16 03:15:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418493746] [2021-04-16 03:15:28,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-16 03:15:28,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-16 03:15:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-16 03:15:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 03:15:28,945 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 03:15:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-16 03:15:29,064 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-04-16 03:15:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-16 03:15:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-04-16 03:15:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-16 03:15:29,078 INFO L225 Difference]: With dead ends: 24 [2021-04-16 03:15:29,079 INFO L226 Difference]: Without dead ends: 18 [2021-04-16 03:15:29,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-16 03:15:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-04-16 03:15:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-04-16 03:15:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 12 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-04-16 03:15:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-04-16 03:15:29,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2021-04-16 03:15:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-16 03:15:29,127 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-04-16 03:15:29,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-04-16 03:15:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-04-16 03:15:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-16 03:15:29,129 INFO L511 BasicCegarLoop]: Found error trace [2021-04-16 03:15:29,129 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-16 03:15:29,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-16 03:15:29,130 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-04-16 03:15:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-16 03:15:29,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1382799915, now seen corresponding path program 1 times [2021-04-16 03:15:29,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-16 03:15:29,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003392321] [2021-04-16 03:15:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-16 03:15:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 03:15:29,174 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 03:15:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-16 03:15:29,196 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-16 03:15:29,222 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-16 03:15:29,223 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-04-16 03:15:29,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-16 03:15:29,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.04 03:15:29 BasicIcfg [2021-04-16 03:15:29,253 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-16 03:15:29,254 INFO L168 Benchmark]: Toolchain (without parser) took 1767.25 ms. Allocated memory is still 197.1 MB. Free memory was 163.5 MB in the beginning and 134.7 MB in the end (delta: 28.8 MB). Peak memory consumption was 28.5 MB. Max. memory is 8.0 GB. [2021-04-16 03:15:29,255 INFO L168 Benchmark]: CDTParser took 1.06 ms. Allocated memory is still 197.1 MB. Free memory is still 179.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-04-16 03:15:29,256 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.54 ms. Allocated memory is still 197.1 MB. Free memory was 163.3 MB in the beginning and 154.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-04-16 03:15:29,256 INFO L168 Benchmark]: Boogie Preprocessor took 62.25 ms. Allocated memory is still 197.1 MB. Free memory was 154.0 MB in the beginning and 181.5 MB in the end (delta: -27.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2021-04-16 03:15:29,257 INFO L168 Benchmark]: RCFGBuilder took 540.61 ms. Allocated memory is still 197.1 MB. Free memory was 181.5 MB in the beginning and 167.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-04-16 03:15:29,258 INFO L168 Benchmark]: IcfgTransformer took 26.51 ms. Allocated memory is still 197.1 MB. Free memory was 167.7 MB in the beginning and 166.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-04-16 03:15:29,258 INFO L168 Benchmark]: TraceAbstraction took 882.37 ms. Allocated memory is still 197.1 MB. Free memory was 166.2 MB in the beginning and 134.7 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2021-04-16 03:15:29,261 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.06 ms. Allocated memory is still 197.1 MB. Free memory is still 179.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.54 ms. Allocated memory is still 197.1 MB. Free memory was 163.3 MB in the beginning and 154.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.25 ms. Allocated memory is still 197.1 MB. Free memory was 154.0 MB in the beginning and 181.5 MB in the end (delta: -27.5 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 540.61 ms. Allocated memory is still 197.1 MB. Free memory was 181.5 MB in the beginning and 167.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 26.51 ms. Allocated memory is still 197.1 MB. Free memory was 167.7 MB in the beginning and 166.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 882.37 ms. Allocated memory is still 197.1 MB. Free memory was 166.2 MB in the beginning and 134.7 MB in the end (delta: 31.5 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x; VAL [\old(x)=53, x=0] [L22] x=__VERIFIER_nondet_int() [L23] COND FALSE !(x > 0) VAL [\old(x)=0, x=-1] [L28] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=-1] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] [L7] reach_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 790.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 15.9ms, AutomataDifference: 163.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 5 SDslu, 6 SDs, 0 SdLazy, 12 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 55.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.0ms SsaConstructionTime, 83.9ms SatisfiabilityAnalysisTime, 241.2ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 43 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...