/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:40:52,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:40:52,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:40:52,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:40:52,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:40:52,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:40:52,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:40:52,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:40:52,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:40:52,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:40:52,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:40:52,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:40:52,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:40:52,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:40:52,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:40:52,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:40:52,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:40:52,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:40:52,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:40:52,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:40:52,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:40:52,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:40:52,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:40:52,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:40:52,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:40:52,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:40:52,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:40:52,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:40:52,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:40:52,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:40:52,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:40:52,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:40:52,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:40:52,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:40:52,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:40:52,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:40:52,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:40:52,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:40:52,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:40:52,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:40:52,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:40:52,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:40:52,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:40:52,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:40:52,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:40:52,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:40:52,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:40:52,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:40:52,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:40:52,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:40:52,990 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:40:52,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:40:53,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:40:53,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:40:53,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:40:53,279 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:40:53,280 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:40:53,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-05-06 07:40:53,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae43072ed/dce1927734124e8c806bb5c857c42d69/FLAGe068c04a2 [2021-05-06 07:40:53,715 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:40:53,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c [2021-05-06 07:40:53,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae43072ed/dce1927734124e8c806bb5c857c42d69/FLAGe068c04a2 [2021-05-06 07:40:53,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae43072ed/dce1927734124e8c806bb5c857c42d69 [2021-05-06 07:40:53,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:40:53,731 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:40:53,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:40:53,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:40:53,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:40:53,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d0ef79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53, skipping insertion in model container [2021-05-06 07:40:53,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:40:53,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:40:53,846 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c[533,546] [2021-05-06 07:40:53,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:40:53,867 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:40:53,875 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_valuebound50.c[533,546] [2021-05-06 07:40:53,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:40:53,922 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:40:53,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53 WrapperNode [2021-05-06 07:40:53,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:40:53,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:40:53,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:40:53,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:40:53,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (1/1) ... [2021-05-06 07:40:53,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:40:53,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:40:53,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:40:53,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:40:53,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (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 [2021-05-06 07:40:54,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:40:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:40:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:40:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:40:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:40:54,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:40:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:40:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:40:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:40:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:40:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:40:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:40:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:40:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:40:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:40:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:40:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:40:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:40:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:40:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:40:54,272 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:40:54,272 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:40:54,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:40:54 BoogieIcfgContainer [2021-05-06 07:40:54,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:40:54,274 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:40:54,274 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:40:54,274 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:40:54,276 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:40:54" (1/1) ... [2021-05-06 07:40:54,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:40:54 BasicIcfg [2021-05-06 07:40:54,298 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:40:54,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:40:54,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:40:54,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:40:54,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:40:53" (1/4) ... [2021-05-06 07:40:54,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276b0b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:40:54, skipping insertion in model container [2021-05-06 07:40:54,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:40:53" (2/4) ... [2021-05-06 07:40:54,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276b0b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:40:54, skipping insertion in model container [2021-05-06 07:40:54,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:40:54" (3/4) ... [2021-05-06 07:40:54,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276b0b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:40:54, skipping insertion in model container [2021-05-06 07:40:54,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:40:54" (4/4) ... [2021-05-06 07:40:54,303 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound50.cJordan [2021-05-06 07:40:54,315 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:40:54,319 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:40:54,331 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:40:54,344 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:40:54,344 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:40:54,344 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:40:54,344 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:40:54,344 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:40:54,344 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:40:54,344 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:40:54,345 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:40:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:40:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:40:54,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:40:54,370 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:40:54,370 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:40:54,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:40:54,374 INFO L82 PathProgramCache]: Analyzing trace with hash 890522097, now seen corresponding path program 1 times [2021-05-06 07:40:54,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:40:54,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882405047] [2021-05-06 07:40:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:40:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:40:54,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:40:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:40:54,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:40:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:40:54,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:40:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:40:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:40:54,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:40:54,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882405047] [2021-05-06 07:40:54,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882405047] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:40:54,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:40:54,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:40:54,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399992347] [2021-05-06 07:40:54,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:40:54,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:40:54,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:40:54,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:40:54,623 INFO L87 Difference]: Start difference. First operand has 38 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:47:22,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:47:22,115 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2021-05-06 07:47:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:47:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:47:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:47:22,121 INFO L225 Difference]: With dead ends: 38 [2021-05-06 07:47:22,122 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 07:47:22,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:47:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 07:47:22,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 07:47:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:47:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-06 07:47:22,155 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2021-05-06 07:47:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:47:22,155 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-06 07:47:22,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:47:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-06 07:47:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 07:47:22,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:47:22,157 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:47:22,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:47:22,157 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:47:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:47:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1386957495, now seen corresponding path program 1 times [2021-05-06 07:47:22,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:47:22,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278278337] [2021-05-06 07:47:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:47:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:47:22,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:47:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:47:22,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:47:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:47:22,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:47:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:47:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:47:22,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:47:22,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278278337] [2021-05-06 07:47:22,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278278337] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:47:22,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:47:22,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 07:47:22,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949879600] [2021-05-06 07:47:22,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:47:22,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:47:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:47:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:47:22,387 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)