/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/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:22:56,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:22:56,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:22:56,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:22:56,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:22:56,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:22:56,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:22:56,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:22:56,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:22:56,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:22:56,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:22:56,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:22:56,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:22:56,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:22:56,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:22:56,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:22:56,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:22:56,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:22:56,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:22:56,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:22:56,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:22:56,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:22:56,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:22:56,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:22:56,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:22:56,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:22:56,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:22:56,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:22:56,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:22:56,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:22:56,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:22:56,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:22:56,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:22:56,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:22:56,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:22:56,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:22:56,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:22:56,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:22:56,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:22:56,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:22:56,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:22:56,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:22:56,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:22:56,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:22:56,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:22:56,562 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:22:56,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:22:56,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:22:56,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:22:56,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:22:56,564 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:22:56,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:22:56,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:22:56,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:22:56,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:22:56,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:22:56,810 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:22:56,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2021-05-02 18:22:56,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e987b2580/f49412be4b1b4bdfbc13a5fdf84189e4/FLAG5a74354c9 [2021-05-02 18:22:57,197 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:22:57,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2021-05-02 18:22:57,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e987b2580/f49412be4b1b4bdfbc13a5fdf84189e4/FLAG5a74354c9 [2021-05-02 18:22:57,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e987b2580/f49412be4b1b4bdfbc13a5fdf84189e4 [2021-05-02 18:22:57,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:22:57,594 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:22:57,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:22:57,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:22:57,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:22:57,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:57,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ebd2a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57, skipping insertion in model container [2021-05-02 18:22:57,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:57,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:22:57,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:22:57,839 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2021-05-02 18:22:57,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:22:57,849 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:22:57,943 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2021-05-02 18:22:57,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:22:57,957 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:22:57,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57 WrapperNode [2021-05-02 18:22:57,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:22:57,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:22:57,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:22:57,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:22:57,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:57,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:57,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:57,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:58,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:58,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:58,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (1/1) ... [2021-05-02 18:22:58,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:22:58,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:22:58,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:22:58,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:22:58,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (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 18:22:58,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:22:58,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:22:58,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:22:58,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:22:58,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:22:58,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-05-02 18:22:58,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:22:58,572 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-02 18:22:58,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:22:58 BoogieIcfgContainer [2021-05-02 18:22:58,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:22:58,575 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:22:58,575 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:22:58,575 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:22:58,577 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:22:58" (1/1) ... [2021-05-02 18:22:58,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:22:58 BasicIcfg [2021-05-02 18:22:58,591 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:22:58,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:22:58,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:22:58,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:22:58,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:22:57" (1/4) ... [2021-05-02 18:22:58,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dda051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:22:58, skipping insertion in model container [2021-05-02 18:22:58,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:22:57" (2/4) ... [2021-05-02 18:22:58,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dda051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:22:58, skipping insertion in model container [2021-05-02 18:22:58,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:22:58" (3/4) ... [2021-05-02 18:22:58,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20dda051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:22:58, skipping insertion in model container [2021-05-02 18:22:58,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:22:58" (4/4) ... [2021-05-02 18:22:58,598 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.cJordan [2021-05-02 18:22:58,604 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:22:58,608 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:22:58,620 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:22:58,639 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:22:58,639 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:22:58,639 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:22:58,639 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:22:58,639 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:22:58,639 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:22:58,640 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:22:58,640 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:22:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:22:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:22:58,655 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:58,656 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:58,656 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -29084800, now seen corresponding path program 1 times [2021-05-02 18:22:58,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:58,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496932889] [2021-05-02 18:22:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:58,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:22:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:58,961 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 18:22:58,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:58,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496932889] [2021-05-02 18:22:58,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496932889] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:22:58,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:22:58,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 18:22:58,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792126159] [2021-05-02 18:22:58,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 18:22:58,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:58,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 18:22:58,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:22:58,975 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:59,089 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-02 18:22:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:22:59,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 18:22:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:59,094 INFO L225 Difference]: With dead ends: 31 [2021-05-02 18:22:59,095 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 18:22:59,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:22:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 18:22:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-05-02 18:22:59,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 18:22:59,115 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2021-05-02 18:22:59,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:59,115 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 18:22:59,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:59,115 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 18:22:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:22:59,115 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:59,116 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:59,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:22:59,116 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263588, now seen corresponding path program 1 times [2021-05-02 18:22:59,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:59,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662053445] [2021-05-02 18:22:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:59,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:22:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:59,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:22:59,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662053445] [2021-05-02 18:22:59,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662053445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:59,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598479082] [2021-05-02 18:22:59,258 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 18:22:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:22:59,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 18:22:59,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:22:59,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:22:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:22:59,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598479082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:22:59,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:22:59,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 18:22:59,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344060000] [2021-05-02 18:22:59,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:22:59,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:22:59,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:22:59,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:22:59,528 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:22:59,698 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 18:22:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:22:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 18:22:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:22:59,699 INFO L225 Difference]: With dead ends: 26 [2021-05-02 18:22:59,699 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 18:22:59,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:22:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 18:22:59,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-05-02 18:22:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:59,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 18:22:59,705 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2021-05-02 18:22:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:22:59,706 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 18:22:59,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:22:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 18:22:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 18:22:59,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:22:59,708 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:22:59,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 18:22:59,926 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:22:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:22:59,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1110414080, now seen corresponding path program 2 times [2021-05-02 18:22:59,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:22:59,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995727944] [2021-05-02 18:22:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:22:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:23:00,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:23:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:23:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:00,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:00,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995727944] [2021-05-02 18:23:00,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995727944] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:00,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598347383] [2021-05-02 18:23:00,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 18:23:00,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:23:00,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:00,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:23:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:00,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:00,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598347383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:00,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:23:00,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 18:23:00,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477561785] [2021-05-02 18:23:00,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:23:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:00,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:23:00,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:23:00,313 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:23:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:00,500 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-02 18:23:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:23:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 18:23:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:00,501 INFO L225 Difference]: With dead ends: 31 [2021-05-02 18:23:00,501 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 18:23:00,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:23:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 18:23:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-05-02 18:23:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:23:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 18:23:00,504 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2021-05-02 18:23:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:00,505 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 18:23:00,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:23:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 18:23:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 18:23:00,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:23:00,505 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:23:00,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:00,722 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:23:00,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:23:00,722 INFO L82 PathProgramCache]: Analyzing trace with hash -954089124, now seen corresponding path program 3 times [2021-05-02 18:23:00,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:23:00,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043063967] [2021-05-02 18:23:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:23:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:23:00,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:23:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:23:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:23:00,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:23:00,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043063967] [2021-05-02 18:23:00,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043063967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:00,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403143040] [2021-05-02 18:23:00,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 18:23:01,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 18:23:01,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:23:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 18:23:01,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:23:01,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:01,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:01,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 18:23:01,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-05-02 18:23:01,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-02 18:23:01,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 18:23:01,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 18:23:01,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:18 [2021-05-02 18:23:01,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:01,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:01,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:01,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:01,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:23:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 18:23:01,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403143040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:23:01,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:23:01,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-02 18:23:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39583164] [2021-05-02 18:23:01,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 18:23:01,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:23:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 18:23:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:23:01,469 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:23:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:23:01,927 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 18:23:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 18:23:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 18:23:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:23:01,928 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:23:01,928 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:23:01,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-05-02 18:23:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:23:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:23:01,928 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 18:23:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:23:01,929 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-05-02 18:23:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:23:01,929 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:23:01,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:23:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:23:01,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:23:02,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:23:02,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:23:02 BasicIcfg [2021-05-02 18:23:02,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:23:02,134 INFO L168 Benchmark]: Toolchain (without parser) took 4539.55 ms. Allocated memory was 180.4 MB in the beginning and 237.0 MB in the end (delta: 56.6 MB). Free memory was 144.4 MB in the beginning and 113.7 MB in the end (delta: 30.8 MB). Peak memory consumption was 88.9 MB. Max. memory is 8.0 GB. [2021-05-02 18:23:02,134 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 180.4 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:23:02,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 361.54 ms. Allocated memory is still 180.4 MB. Free memory was 144.3 MB in the beginning and 157.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-05-02 18:23:02,134 INFO L168 Benchmark]: Boogie Preprocessor took 70.53 ms. Allocated memory is still 180.4 MB. Free memory was 157.7 MB in the beginning and 154.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-05-02 18:23:02,134 INFO L168 Benchmark]: RCFGBuilder took 543.30 ms. Allocated memory is still 180.4 MB. Free memory was 154.0 MB in the beginning and 81.1 MB in the end (delta: 72.9 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:23:02,134 INFO L168 Benchmark]: IcfgTransformer took 16.94 ms. Allocated memory is still 180.4 MB. Free memory was 81.1 MB in the beginning and 79.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 18:23:02,134 INFO L168 Benchmark]: TraceAbstraction took 3540.56 ms. Allocated memory was 180.4 MB in the beginning and 237.0 MB in the end (delta: 56.6 MB). Free memory was 79.0 MB in the beginning and 113.7 MB in the end (delta: -34.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:23:02,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 180.4 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 361.54 ms. Allocated memory is still 180.4 MB. Free memory was 144.3 MB in the beginning and 157.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.53 ms. Allocated memory is still 180.4 MB. Free memory was 157.7 MB in the beginning and 154.0 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 543.30 ms. Allocated memory is still 180.4 MB. Free memory was 154.0 MB in the beginning and 81.1 MB in the end (delta: 72.9 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. * IcfgTransformer took 16.94 ms. Allocated memory is still 180.4 MB. Free memory was 81.1 MB in the beginning and 79.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3540.56 ms. Allocated memory was 180.4 MB in the beginning and 237.0 MB in the end (delta: 56.6 MB). Free memory was 79.0 MB in the beginning and 113.7 MB in the end (delta: -34.6 MB). Peak memory consumption was 22.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 221]: 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 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3492.8ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 10.7ms, AutomataDifference: 951.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 50 SDtfs, 112 SDslu, 129 SDs, 0 SdLazy, 295 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 296.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 885.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 83.7ms SsaConstructionTime, 578.6ms SatisfiabilityAnalysisTime, 984.8ms InterpolantComputationTime, 144 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 840 SizeOfPredicates, 12 NumberOfNonLiveVariables, 1457 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 13/76 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...