/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/prodbin-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:51:50,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:51:50,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:51:50,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:51:50,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:51:50,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:51:50,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:51:50,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:51:50,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:51:50,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:51:50,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:51:50,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:51:50,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:51:50,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:51:50,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:51:50,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:51:50,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:51:50,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:51:50,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:51:50,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:51:50,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:51:50,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:51:50,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:51:50,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:51:50,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:51:50,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:51:50,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:51:50,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:51:50,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:51:50,427 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:51:50,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:51:50,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:51:50,429 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:51:50,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:51:50,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:51:50,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:51:50,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:51:50,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:51:50,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:51:50,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:51:50,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:51:50,431 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:51:50,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:51:50,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:51:50,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:51:50,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:51:50,667 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:51:50,667 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:51:50,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-02 21:51:50,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2922e52ca/dc0ed05163c840f79e9ba726fc2fae4b/FLAG258dc0f18 [2021-05-02 21:51:50,997 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:51:50,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound1.c [2021-05-02 21:51:51,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2922e52ca/dc0ed05163c840f79e9ba726fc2fae4b/FLAG258dc0f18 [2021-05-02 21:51:51,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2922e52ca/dc0ed05163c840f79e9ba726fc2fae4b [2021-05-02 21:51:51,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:51:51,432 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:51:51,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:51:51,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:51:51,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:51:51,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1c8f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51, skipping insertion in model container [2021-05-02 21:51:51,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:51:51,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:51:51,550 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-02 21:51:51,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:51:51,562 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:51:51,572 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/prodbin-ll_unwindbound1.c[537,550] [2021-05-02 21:51:51,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:51:51,583 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:51:51,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51 WrapperNode [2021-05-02 21:51:51,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:51:51,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:51:51,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:51:51,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:51:51,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:51:51,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:51:51,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:51:51,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:51:51,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (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 21:51:51,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:51:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:51:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:51:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:51:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:51:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:51:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:51:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:51:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:51:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:51:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:51:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:51:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:51:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:51:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:51:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:51:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:51:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:51:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:51:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:51:51,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:51:51,852 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:51:51,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:51 BoogieIcfgContainer [2021-05-02 21:51:51,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:51:51,854 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:51:51,854 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:51:51,855 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:51:51,856 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:51" (1/1) ... [2021-05-02 21:51:51,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:51:51 BasicIcfg [2021-05-02 21:51:51,868 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:51:51,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:51:51,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:51:51,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:51:51,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:51:51" (1/4) ... [2021-05-02 21:51:51,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efbbdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:51:51, skipping insertion in model container [2021-05-02 21:51:51,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:51" (2/4) ... [2021-05-02 21:51:51,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efbbdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:51:51, skipping insertion in model container [2021-05-02 21:51:51,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:51" (3/4) ... [2021-05-02 21:51:51,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efbbdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:51:51, skipping insertion in model container [2021-05-02 21:51:51,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:51:51" (4/4) ... [2021-05-02 21:51:51,878 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound1.cJordan [2021-05-02 21:51:51,882 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:51:51,884 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:51:51,911 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:51:51,922 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:51:51,922 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:51:51,923 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:51:51,923 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:51:51,923 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:51:51,923 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:51:51,923 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:51:51,923 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:51:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:51:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:51:51,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:51,935 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:51:51,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-02 21:51:51,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:51,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931592701] [2021-05-02 21:51:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:52,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:51:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:51:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:52,195 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 21:51:52,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:52,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931592701] [2021-05-02 21:51:52,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931592701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:51:52,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:51:52,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:51:52,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415831344] [2021-05-02 21:51:52,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:51:52,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:51:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:51:52,215 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:51:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:51:52,272 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 21:51:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:51:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 21:51:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:51:52,281 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:51:52,281 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:51:52,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:51:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:51:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:51:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 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 21:51:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 21:51:52,306 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 21:51:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:51:52,306 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 21:51:52,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:51:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 21:51:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:51:52,307 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:52,308 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 21:51:52,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:51:52,308 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-02 21:51:52,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:52,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372367540] [2021-05-02 21:51:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:52,335 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:51:52,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113788081] [2021-05-02 21:51:52,336 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 21:51:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:51:52,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:51:52,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:52,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:52,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:52,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:52,555 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 21:51:52,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:52,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372367540] [2021-05-02 21:51:52,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:51:52,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113788081] [2021-05-02 21:51:52,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113788081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:51:52,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:51:52,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:51:52,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034519513] [2021-05-02 21:51:52,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:51:52,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:52,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:51:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:51:52,560 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 21:51:52,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:51:52,570 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 21:51:52,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:51:52,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18 [2021-05-02 21:51:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:51:52,572 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:51:52,572 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:51:52,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:51:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:51:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:51:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 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 21:51:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 21:51:52,582 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 21:51:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:51:52,583 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 21:51:52,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 21:51:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 21:51:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:51:52,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:52,589 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 21:51:52,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:51:52,801 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:52,801 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-02 21:51:52,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:52,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756687935] [2021-05-02 21:51:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:52,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:51:52,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508274479] [2021-05-02 21:51:52,810 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 21:51:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:52,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:51:52,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:51:52,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:52,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:52,928 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 21:51:52,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:52,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756687935] [2021-05-02 21:51:52,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:51:52,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508274479] [2021-05-02 21:51:52,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508274479] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:51:52,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:51:52,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:51:52,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296372742] [2021-05-02 21:51:52,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:51:52,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:52,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:51:52,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:51:52,930 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 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 21:51:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:51:52,998 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 21:51:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:51:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 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 18 [2021-05-02 21:51:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:51:53,000 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:51:53,001 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:51:53,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:51:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:51:53,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 21:51:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:51:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 21:51:53,009 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 21:51:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:51:53,009 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 21:51:53,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 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 21:51:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 21:51:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:51:53,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:53,010 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:51:53,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:53,211 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-02 21:51:53,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:53,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812730821] [2021-05-02 21:51:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:53,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:51:53,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718875011] [2021-05-02 21:51:53,235 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 21:51:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:51:53,297 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:51:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:51:53,311 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:51:53,356 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 21:51:53,356 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 21:51:53,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:53,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:51:53 BasicIcfg [2021-05-02 21:51:53,577 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 21:51:53,578 INFO L168 Benchmark]: Toolchain (without parser) took 2145.79 ms. Allocated memory is still 198.2 MB. Free memory was 164.0 MB in the beginning and 119.3 MB in the end (delta: 44.7 MB). Peak memory consumption was 45.6 MB. Max. memory is 8.0 GB. [2021-05-02 21:51:53,578 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:51:53,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.96 ms. Allocated memory is still 198.2 MB. Free memory was 163.9 MB in the beginning and 154.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 21:51:53,578 INFO L168 Benchmark]: Boogie Preprocessor took 32.42 ms. Allocated memory is still 198.2 MB. Free memory was 154.1 MB in the beginning and 181.1 MB in the end (delta: -27.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:51:53,578 INFO L168 Benchmark]: RCFGBuilder took 236.31 ms. Allocated memory is still 198.2 MB. Free memory was 181.1 MB in the beginning and 167.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 21:51:53,578 INFO L168 Benchmark]: IcfgTransformer took 19.13 ms. Allocated memory is still 198.2 MB. Free memory was 167.3 MB in the beginning and 166.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:51:53,579 INFO L168 Benchmark]: TraceAbstraction took 1702.96 ms. Allocated memory is still 198.2 MB. Free memory was 165.7 MB in the beginning and 119.3 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.9 MB. Max. memory is 8.0 GB. [2021-05-02 21:51:53,579 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 150.96 ms. Allocated memory is still 198.2 MB. Free memory was 163.9 MB in the beginning and 154.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.42 ms. Allocated memory is still 198.2 MB. Free memory was 154.1 MB in the beginning and 181.1 MB in the end (delta: -27.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 236.31 ms. Allocated memory is still 198.2 MB. Free memory was 181.1 MB in the beginning and 167.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.13 ms. Allocated memory is still 198.2 MB. Free memory was 167.3 MB in the beginning and 166.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1702.96 ms. Allocated memory is still 198.2 MB. Free memory was 165.7 MB in the beginning and 119.3 MB in the end (delta: 46.4 MB). Peak memory consumption was 46.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] int counter = 0; VAL [\old(counter)=10, counter=0] [L22] int a, b; [L23] long long x, y, z; [L25] a = __VERIFIER_nondet_int() [L26] b = __VERIFIER_nondet_int() [L27] CALL assume_abort_if_not(b >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L10] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(b >= 1) VAL [\old(counter)=0, a=-2, b=3, counter=0] [L29] x = a [L30] y = b [L31] z = 0 VAL [\old(counter)=0, a=-2, b=3, counter=0, x=-2, y=3, z=0] [L33] EXPR counter++ VAL [\old(counter)=0, a=-2, b=3, counter=1, counter++=0, x=-2, y=3, z=0] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L13] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z + x * y == (long long) a * b) VAL [\old(counter)=0, a=-2, b=3, counter=1, x=-2, y=3, z=0] [L35] COND FALSE !(!(y != 0)) VAL [\old(counter)=0, a=-2, b=3, counter=1, x=-2, y=3, z=0] [L38] COND TRUE y % 2 == 1 [L39] z = z + x [L40] y = y - 1 VAL [\old(counter)=0, a=-2, b=3, counter=1, x=-2, y=2, z=-2] [L42] x = 2 * x [L43] y = y / 2 VAL [\old(counter)=0, a=-2, b=3, counter=1, x=-4, y=1, z=-2] [L33] EXPR counter++ VAL [\old(counter)=0, a=-2, b=3, counter=2, counter++=1, x=-4, y=1, z=-2] [L33] COND FALSE !(counter++<1) [L45] CALL __VERIFIER_assert(z == (long long) a * b) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L15] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1636.4ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 13.3ms, AutomataDifference: 162.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 32 SDslu, 132 SDs, 0 SdLazy, 88 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.6ms AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.7ms SsaConstructionTime, 110.9ms SatisfiabilityAnalysisTime, 355.4ms InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 157 SizeOfPredicates, 3 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...