/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_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:48:17,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:48:17,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:48:17,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:48:17,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:48:17,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:48:17,853 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:48:17,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:48:17,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:48:17,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:48:17,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:48:17,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:48:17,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:48:17,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:48:17,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:48:17,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:48:17,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:48:17,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:48:17,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:48:17,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:48:17,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:48:17,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:48:17,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:48:17,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:48:17,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:48:17,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:48:17,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:48:17,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:48:17,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:48:17,892 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:48:17,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:48:17,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:48:17,894 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:48:17,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:48:17,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:48:17,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:48:17,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:48:17,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:48:17,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:48:17,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:48:17,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:48:17,895 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:48:17,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:48:17,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:48:17,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:48:17,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:48:17,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:48:17,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:48:17,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:48:17,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:48:17,897 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:48:17,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:48:18,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:48:18,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:48:18,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:48:18,173 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:48:18,173 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:48:18,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound1.c [2021-05-02 19:48:18,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a36de0e/330a1ab5766a46dfbc5510fa7ee97f98/FLAG290cf0b8c [2021-05-02 19:48:18,607 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:48:18,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound1.c [2021-05-02 19:48:18,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a36de0e/330a1ab5766a46dfbc5510fa7ee97f98/FLAG290cf0b8c [2021-05-02 19:48:18,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a36de0e/330a1ab5766a46dfbc5510fa7ee97f98 [2021-05-02 19:48:18,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:48:18,630 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:48:18,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:48:18,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:48:18,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:48:18,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304f4e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18, skipping insertion in model container [2021-05-02 19:48:18,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:48:18,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:48:18,744 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_unwindbound1.c[533,546] [2021-05-02 19:48:18,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:48:18,788 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:48:18,800 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_unwindbound1.c[533,546] [2021-05-02 19:48:18,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:48:18,817 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:48:18,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18 WrapperNode [2021-05-02 19:48:18,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:48:18,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:48:18,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:48:18,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:48:18,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... [2021-05-02 19:48:18,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:48:18,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:48:18,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:48:18,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:48:18,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:48:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:48:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:48:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:48:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:48:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:48:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:48:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:48:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:48:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:48:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:48:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 19:48:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:48:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:48:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:48:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:48:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:48:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:48:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:48:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:48:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:48:19,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:48:19,239 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:48:19,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:48:19 BoogieIcfgContainer [2021-05-02 19:48:19,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:48:19,242 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:48:19,243 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:48:19,243 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:48:19,246 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:48:19" (1/1) ... [2021-05-02 19:48:19,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:48:19 BasicIcfg [2021-05-02 19:48:19,264 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:48:19,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:48:19,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:48:19,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:48:19,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:48:18" (1/4) ... [2021-05-02 19:48:19,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5376ea67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:48:19, skipping insertion in model container [2021-05-02 19:48:19,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:48:18" (2/4) ... [2021-05-02 19:48:19,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5376ea67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:48:19, skipping insertion in model container [2021-05-02 19:48:19,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:48:19" (3/4) ... [2021-05-02 19:48:19,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5376ea67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:48:19, skipping insertion in model container [2021-05-02 19:48:19,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:48:19" (4/4) ... [2021-05-02 19:48:19,272 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound1.cJordan [2021-05-02 19:48:19,276 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:48:19,279 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:48:19,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:48:19,312 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:48:19,313 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:48:19,313 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:48:19,313 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:48:19,313 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:48:19,313 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:48:19,313 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:48:19,313 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:48:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:48:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:48:19,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:48:19,338 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:48:19,338 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:48:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:48:19,344 INFO L82 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2021-05-02 19:48:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:48:19,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328512972] [2021-05-02 19:48:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:48:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:19,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:48:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:19,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:48:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:48:19,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:48:19,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328512972] [2021-05-02 19:48:19,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328512972] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:48:19,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:48:19,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:48:19,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980311394] [2021-05-02 19:48:19,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:48:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:48:19,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:48:19,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:48:19,625 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:48:22,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:48:22,516 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-05-02 19:48:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:48:22,522 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 19:48:22,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:48:22,528 INFO L225 Difference]: With dead ends: 40 [2021-05-02 19:48:22,528 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:48:22,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:48:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:48:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 19:48:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:48:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2021-05-02 19:48:22,556 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2021-05-02 19:48:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:48:22,556 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2021-05-02 19:48:22,557 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:48:22,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2021-05-02 19:48:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 19:48:22,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:48:22,557 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:48:22,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:48:22,558 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:48:22,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:48:22,558 INFO L82 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2021-05-02 19:48:22,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:48:22,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622982261] [2021-05-02 19:48:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:48:22,569 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:48:22,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560759801] [2021-05-02 19:48:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:48:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:22,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:48:22,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:48:22,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:22,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:22,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:22,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:22,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:48:22,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:48:22,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622982261] [2021-05-02 19:48:22,756 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:48:22,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560759801] [2021-05-02 19:48:22,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560759801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:48:22,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:48:22,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:48:22,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356691651] [2021-05-02 19:48:22,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:48:22,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:48:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:48:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:48:22,758 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:48:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:48:22,769 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-05-02 19:48:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:48:22,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 19:48:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:48:22,774 INFO L225 Difference]: With dead ends: 36 [2021-05-02 19:48:22,774 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 19:48:22,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:48:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 19:48:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 19:48:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:48:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2021-05-02 19:48:22,779 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2021-05-02 19:48:22,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:48:22,779 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2021-05-02 19:48:22,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:48:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2021-05-02 19:48:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 19:48:22,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:48:22,780 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:48:22,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:48:22,989 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:48:22,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:48:22,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2021-05-02 19:48:22,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:48:22,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633656592] [2021-05-02 19:48:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:48:22,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:48:22,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971339414] [2021-05-02 19:48:22,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:48:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:23,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:48:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:48:23,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:23,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:48:23,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:48:23,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633656592] [2021-05-02 19:48:23,202 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:48:23,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971339414] [2021-05-02 19:48:23,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971339414] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:48:23,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:48:23,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:48:23,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985650660] [2021-05-02 19:48:23,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:48:23,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:48:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:48:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:48:23,204 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:48:33,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:48:33,669 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-05-02 19:48:33,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:48:33,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-05-02 19:48:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:48:33,671 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:48:33,671 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 19:48:33,671 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:48:33,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 19:48:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 19:48:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 19:48:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2021-05-02 19:48:33,678 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 21 [2021-05-02 19:48:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:48:33,679 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2021-05-02 19:48:33,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:48:33,679 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2021-05-02 19:48:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 19:48:33,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:48:33,679 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:48:33,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:48:33,885 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:48:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:48:33,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2021-05-02 19:48:33,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:48:33,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346608215] [2021-05-02 19:48:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:48:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:33,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:48:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:33,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:48:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:48:34,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:48:34,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346608215] [2021-05-02 19:48:34,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346608215] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:48:34,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:48:34,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 19:48:34,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117169129] [2021-05-02 19:48:34,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:48:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:48:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:48:34,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:48:34,004 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:48:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:48:38,298 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-05-02 19:48:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:48:38,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-05-02 19:48:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:48:38,300 INFO L225 Difference]: With dead ends: 31 [2021-05-02 19:48:38,300 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 19:48:38,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:48:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 19:48:38,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 19:48:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:48:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-02 19:48:38,302 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 21 [2021-05-02 19:48:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:48:38,303 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-02 19:48:38,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:48:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-02 19:48:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 19:48:38,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:48:38,303 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 19:48:38,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 19:48:38,304 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:48:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:48:38,304 INFO L82 PathProgramCache]: Analyzing trace with hash 495445095, now seen corresponding path program 1 times [2021-05-02 19:48:38,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:48:38,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699711418] [2021-05-02 19:48:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:48:38,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:48:38,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137656620] [2021-05-02 19:48:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:48:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:48:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:48:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:48:38,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:38,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:38,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:38,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:48:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:48:38,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:48:38,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699711418] [2021-05-02 19:48:38,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:48:38,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137656620] [2021-05-02 19:48:38,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137656620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:48:38,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:48:38,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:48:38,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181512050] [2021-05-02 19:48:38,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:48:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:48:38,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:48:38,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:48:38,543 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:48:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:48:38,605 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-02 19:48:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:48:38,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 19:48:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:48:38,605 INFO L225 Difference]: With dead ends: 27 [2021-05-02 19:48:38,605 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:48:38,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:48:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:48:38,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:48:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:48:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:48:38,606 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-05-02 19:48:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:48:38,606 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:48:38,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:48:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:48:38,607 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:48:38,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:48:38,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:48:38 BasicIcfg [2021-05-02 19:48:38,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:48:38,825 INFO L168 Benchmark]: Toolchain (without parser) took 20194.43 ms. Allocated memory was 197.1 MB in the beginning and 268.4 MB in the end (delta: 71.3 MB). Free memory was 163.0 MB in the beginning and 186.0 MB in the end (delta: -22.9 MB). Peak memory consumption was 49.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:38,825 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 197.1 MB. Free memory was 179.5 MB in the beginning and 179.4 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:48:38,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.17 ms. Allocated memory is still 197.1 MB. Free memory was 162.9 MB in the beginning and 151.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:38,825 INFO L168 Benchmark]: Boogie Preprocessor took 45.35 ms. Allocated memory is still 197.1 MB. Free memory was 151.9 MB in the beginning and 179.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:38,825 INFO L168 Benchmark]: RCFGBuilder took 376.43 ms. Allocated memory is still 197.1 MB. Free memory was 179.8 MB in the beginning and 161.9 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:38,825 INFO L168 Benchmark]: IcfgTransformer took 21.24 ms. Allocated memory is still 197.1 MB. Free memory was 161.9 MB in the beginning and 160.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:38,826 INFO L168 Benchmark]: TraceAbstraction took 19559.41 ms. Allocated memory was 197.1 MB in the beginning and 268.4 MB in the end (delta: 71.3 MB). Free memory was 159.9 MB in the beginning and 186.0 MB in the end (delta: -26.1 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:48:38,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 197.1 MB. Free memory was 179.5 MB in the beginning and 179.4 MB in the end (delta: 120.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 183.17 ms. Allocated memory is still 197.1 MB. Free memory was 162.9 MB in the beginning and 151.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.35 ms. Allocated memory is still 197.1 MB. Free memory was 151.9 MB in the beginning and 179.8 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 376.43 ms. Allocated memory is still 197.1 MB. Free memory was 179.8 MB in the beginning and 161.9 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 21.24 ms. Allocated memory is still 197.1 MB. Free memory was 161.9 MB in the beginning and 160.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19559.41 ms. Allocated memory was 197.1 MB in the beginning and 268.4 MB in the end (delta: 71.3 MB). Free memory was 159.9 MB in the beginning and 186.0 MB in the end (delta: -26.1 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19510.7ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 17.1ms, AutomataDifference: 17761.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 178 SDtfs, 73 SDslu, 363 SDs, 0 SdLazy, 240 SolverSat, 34 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 16772.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 341.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=3, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 30.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 39.6ms SsaConstructionTime, 131.3ms SatisfiabilityAnalysisTime, 679.0ms InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 101 ConstructedInterpolants, 0 QuantifiedInterpolants, 394 SizeOfPredicates, 5 NumberOfNonLiveVariables, 365 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...