/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/bresenham-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:30:35,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:30:35,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:30:35,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:30:35,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:30:35,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:30:35,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:30:35,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:30:35,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:30:35,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:30:35,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:30:35,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:30:35,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:30:35,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:30:35,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:30:35,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:30:35,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:30:35,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:30:35,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:30:35,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:30:35,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:30:35,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:30:35,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:30:35,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:30:35,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:30:35,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:30:35,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:30:35,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:30:35,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:30:35,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:30:35,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:30:35,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:30:35,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:30:35,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:30:35,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:30:35,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:30:35,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:30:35,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:30:35,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:30:35,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:30:35,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:30:35,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:30:35,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:30:35,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:30:35,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:30:35,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:30:35,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:30:35,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:30:35,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:30:35,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:30:35,410 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:30:35,410 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:30:35,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:30:35,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:30:35,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:30:35,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:30:35,729 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:30:35,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-05-02 19:30:35,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1da2be431/69dfb76f628b40e996e617183ae2ea6a/FLAG29945c3ac [2021-05-02 19:30:36,245 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:30:36,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound20.c [2021-05-02 19:30:36,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1da2be431/69dfb76f628b40e996e617183ae2ea6a/FLAG29945c3ac [2021-05-02 19:30:36,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1da2be431/69dfb76f628b40e996e617183ae2ea6a [2021-05-02 19:30:36,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:30:36,777 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:30:36,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:36,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:30:36,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:30:36,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:36" (1/1) ... [2021-05-02 19:30:36,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742726b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:36, skipping insertion in model container [2021-05-02 19:30:36,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:36" (1/1) ... [2021-05-02 19:30:36,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:30:36,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:30:36,951 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/bresenham-ll_valuebound20.c[597,610] [2021-05-02 19:30:36,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:36,983 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:30:37,003 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/bresenham-ll_valuebound20.c[597,610] [2021-05-02 19:30:37,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:37,058 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:30:37,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37 WrapperNode [2021-05-02 19:30:37,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:37,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:30:37,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:30:37,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:30:37,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:30:37,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:30:37,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:30:37,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:30:37,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:30:37,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:30:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:30:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:30:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:30:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:30:37,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:30:37,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:30:37,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:30:37,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:30:37,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:30:37,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:30:37,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:30:37,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:30:37,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:30:37,378 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:30:37,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:37 BoogieIcfgContainer [2021-05-02 19:30:37,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:30:37,379 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:30:37,379 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:30:37,380 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:30:37,382 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:37" (1/1) ... [2021-05-02 19:30:37,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:37 BasicIcfg [2021-05-02 19:30:37,407 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:30:37,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:30:37,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:30:37,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:30:37,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:30:36" (1/4) ... [2021-05-02 19:30:37,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a573ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:37, skipping insertion in model container [2021-05-02 19:30:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:37" (2/4) ... [2021-05-02 19:30:37,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a573ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:37, skipping insertion in model container [2021-05-02 19:30:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:37" (3/4) ... [2021-05-02 19:30:37,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a573ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:37, skipping insertion in model container [2021-05-02 19:30:37,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:37" (4/4) ... [2021-05-02 19:30:37,422 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound20.cJordan [2021-05-02 19:30:37,426 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:30:37,429 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:30:37,445 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:30:37,471 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:30:37,471 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:30:37,471 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:30:37,471 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:30:37,471 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:30:37,472 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:30:37,472 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:30:37,472 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:30:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:30:37,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:37,487 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:37,487 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2021-05-02 19:30:37,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:37,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288536641] [2021-05-02 19:30:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:37,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:30:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:37,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:30:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:37,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 19:30:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:30:37,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:37,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288536641] [2021-05-02 19:30:37,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288536641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:30:37,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:30:37,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:30:37,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768659640] [2021-05-02 19:30:37,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:30:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:37,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:30:37,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:37,733 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:37,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:37,808 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 19:30:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:30:37,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:30:37,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:37,814 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:30:37,814 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 19:30:37,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:30:37,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 19:30:37,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 19:30:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 19:30:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 19:30:37,837 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2021-05-02 19:30:37,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:37,837 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 19:30:37,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:37,837 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 19:30:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:30:37,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:37,838 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:37,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:30:37,839 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2021-05-02 19:30:37,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:37,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775220532] [2021-05-02 19:30:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:37,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:37,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429161644] [2021-05-02 19:30:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:37,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:30:37,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:38,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:38,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:38,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775220532] [2021-05-02 19:30:38,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:38,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429161644] [2021-05-02 19:30:38,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429161644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:38,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:38,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:30:38,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368296543] [2021-05-02 19:30:38,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:30:38,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:30:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:30:38,114 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:38,221 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 19:30:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:30:38,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:30:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:38,223 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:30:38,223 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:30:38,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:30:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:30:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 19:30:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 19:30:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 19:30:38,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2021-05-02 19:30:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:38,229 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 19:30:38,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:30:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 19:30:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:30:38,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:38,230 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:38,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:30:38,447 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2021-05-02 19:30:38,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:38,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108097798] [2021-05-02 19:30:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:38,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:38,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609065510] [2021-05-02 19:30:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:38,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:30:38,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:38,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:38,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:38,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108097798] [2021-05-02 19:30:38,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:38,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609065510] [2021-05-02 19:30:38,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609065510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:38,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:38,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:30:38,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807372818] [2021-05-02 19:30:38,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:30:38,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:30:38,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:38,742 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:38,887 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-05-02 19:30:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:30:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 19:30:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:38,889 INFO L225 Difference]: With dead ends: 46 [2021-05-02 19:30:38,889 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 19:30:38,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:30:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 19:30:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 19:30:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 19:30:38,900 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2021-05-02 19:30:38,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:38,900 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 19:30:38,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:38,900 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 19:30:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:30:38,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:38,902 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:39,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:39,119 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2021-05-02 19:30:39,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:39,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809953123] [2021-05-02 19:30:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:39,140 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:39,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498279458] [2021-05-02 19:30:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:30:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:39,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:39,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:39,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:39,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:39,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:39,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:30:39,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:39,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809953123] [2021-05-02 19:30:39,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:39,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498279458] [2021-05-02 19:30:39,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498279458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:39,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:39,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:30:39,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189794490] [2021-05-02 19:30:39,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:30:39,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:39,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:30:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:30:39,437 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:39,649 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-02 19:30:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:30:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 19:30:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:39,652 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:30:39,652 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:30:39,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:30:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:30:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-02 19:30:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:30:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-05-02 19:30:39,666 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2021-05-02 19:30:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:39,666 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-05-02 19:30:39,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:30:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-05-02 19:30:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 19:30:39,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:39,669 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:39,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:39,886 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2021-05-02 19:30:39,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:39,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350509012] [2021-05-02 19:30:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:39,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:39,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975149634] [2021-05-02 19:30:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:30:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:30:39,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:39,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:39,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:30:40,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:40,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350509012] [2021-05-02 19:30:40,259 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:40,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975149634] [2021-05-02 19:30:40,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975149634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:40,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:40,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:30:40,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261002348] [2021-05-02 19:30:40,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:30:40,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:40,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:30:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:30:40,261 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:40,488 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-05-02 19:30:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:30:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2021-05-02 19:30:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:40,489 INFO L225 Difference]: With dead ends: 59 [2021-05-02 19:30:40,489 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 19:30:40,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-02 19:30:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 19:30:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-05-02 19:30:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 19:30:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 19:30:40,492 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2021-05-02 19:30:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:40,492 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 19:30:40,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 19:30:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:30:40,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:40,493 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:40,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:40,711 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash 718222219, now seen corresponding path program 2 times [2021-05-02 19:30:40,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:40,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804799149] [2021-05-02 19:30:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:30:40,738 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:30:40,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926234917] [2021-05-02 19:30:40,739 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:30:40,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:30:40,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:30:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:30:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:30:40,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:40,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:30:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 19:30:41,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:30:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804799149] [2021-05-02 19:30:41,290 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:30:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926234917] [2021-05-02 19:30:41,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926234917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:30:41,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:30:41,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:30:41,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112162855] [2021-05-02 19:30:41,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:30:41,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:30:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:30:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:30:41,292 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:43,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:30:43,850 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-02 19:30:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:30:43,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 19:30:43,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:30:43,851 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:30:43,851 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:30:43,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:30:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:30:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:30:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:30:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:30:43,852 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-02 19:30:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:30:43,852 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:30:43,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 13 states have (on average 2.230769230769231) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:30:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:30:43,852 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:30:44,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:30:44,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:44 BasicIcfg [2021-05-02 19:30:44,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:30:44,056 INFO L168 Benchmark]: Toolchain (without parser) took 7282.68 ms. Allocated memory was 201.3 MB in the beginning and 268.4 MB in the end (delta: 67.1 MB). Free memory was 166.6 MB in the beginning and 100.0 MB in the end (delta: 66.7 MB). Peak memory consumption was 133.9 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:44,057 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 201.3 MB. Free memory was 183.7 MB in the beginning and 183.6 MB in the end (delta: 94.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:30:44,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.00 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 184.4 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:44,057 INFO L168 Benchmark]: Boogie Preprocessor took 48.01 ms. Allocated memory is still 201.3 MB. Free memory was 184.4 MB in the beginning and 182.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:44,057 INFO L168 Benchmark]: RCFGBuilder took 270.75 ms. Allocated memory is still 201.3 MB. Free memory was 182.8 MB in the beginning and 167.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:44,057 INFO L168 Benchmark]: IcfgTransformer took 28.13 ms. Allocated memory is still 201.3 MB. Free memory was 167.1 MB in the beginning and 165.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:44,057 INFO L168 Benchmark]: TraceAbstraction took 6638.31 ms. Allocated memory was 201.3 MB in the beginning and 268.4 MB in the end (delta: 67.1 MB). Free memory was 165.5 MB in the beginning and 100.0 MB in the end (delta: 65.5 MB). Peak memory consumption was 133.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:30:44,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 201.3 MB. Free memory was 183.7 MB in the beginning and 183.6 MB in the end (delta: 94.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.00 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 184.4 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.01 ms. Allocated memory is still 201.3 MB. Free memory was 184.4 MB in the beginning and 182.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 270.75 ms. Allocated memory is still 201.3 MB. Free memory was 182.8 MB in the beginning and 167.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 28.13 ms. Allocated memory is still 201.3 MB. Free memory was 167.1 MB in the beginning and 165.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6638.31 ms. Allocated memory was 201.3 MB in the beginning and 268.4 MB in the end (delta: 67.1 MB). Free memory was 165.5 MB in the beginning and 100.0 MB in the end (delta: 65.5 MB). Peak memory consumption was 133.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6583.8ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 13.7ms, AutomataDifference: 3355.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 130 SDtfs, 148 SDslu, 631 SDs, 0 SdLazy, 1021 SolverSat, 57 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2776.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1107.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 41.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 61.9ms SsaConstructionTime, 160.4ms SatisfiabilityAnalysisTime, 1563.0ms InterpolantComputationTime, 190 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 1206 SizeOfPredicates, 27 NumberOfNonLiveVariables, 703 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 27/60 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...