/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/geo2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:51:19,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:51:19,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:51:19,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:51:19,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:51:19,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:51:19,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:51:19,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:51:19,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:51:19,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:51:19,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:51:19,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:51:19,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:51:19,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:51:19,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:51:19,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:51:19,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:51:19,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:51:19,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:51:19,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:51:19,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:51:19,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:51:19,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:51:19,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:51:19,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:51:19,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:51:19,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:51:19,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:51:19,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:51:19,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:51:19,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:51:19,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:51:19,511 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:51:19,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:51:19,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:51:19,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:51:19,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:51:19,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:51:19,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:51:19,512 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:51:19,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:51:19,513 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:51:19,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:51:19,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:51:19,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:51:19,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:51:19,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:51:19,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:51:19,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:51:19,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:51:19,515 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:51:19,515 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:51:19,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:51:19,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:51:19,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:51:19,852 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:51:19,853 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:51:19,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound50.c [2021-05-02 20:51:19,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4992ad8b/cc6b7e28f6d2479cbcd95020bb5fdb98/FLAG416f061fa [2021-05-02 20:51:20,306 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:51:20,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound50.c [2021-05-02 20:51:20,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4992ad8b/cc6b7e28f6d2479cbcd95020bb5fdb98/FLAG416f061fa [2021-05-02 20:51:20,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4992ad8b/cc6b7e28f6d2479cbcd95020bb5fdb98 [2021-05-02 20:51:20,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:51:20,335 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:51:20,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:20,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:51:20,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:51:20,342 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2486e45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20, skipping insertion in model container [2021-05-02 20:51:20,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:51:20,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:51:20,466 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/geo2-ll_valuebound50.c[525,538] [2021-05-02 20:51:20,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:20,482 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:51:20,524 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/geo2-ll_valuebound50.c[525,538] [2021-05-02 20:51:20,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:51:20,553 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:51:20,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20 WrapperNode [2021-05-02 20:51:20,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:51:20,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:51:20,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:51:20,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:51:20,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:51:20,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:51:20,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:51:20,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:51:20,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (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 20:51:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:51:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:51:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:51:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:51:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:51:20,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:51:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:51:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:51:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:51:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:51:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:51:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:51:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:51:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:51:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:51:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:51:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:51:20,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:51:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:51:20,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:51:20,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:51:20,867 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:51:20,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:20 BoogieIcfgContainer [2021-05-02 20:51:20,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:51:20,869 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:51:20,869 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:51:20,869 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:51:20,872 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:20" (1/1) ... [2021-05-02 20:51:20,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:20 BasicIcfg [2021-05-02 20:51:20,902 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:51:20,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:51:20,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:51:20,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:51:20,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:51:20" (1/4) ... [2021-05-02 20:51:20,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb0324a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:20, skipping insertion in model container [2021-05-02 20:51:20,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:51:20" (2/4) ... [2021-05-02 20:51:20,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb0324a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:51:20, skipping insertion in model container [2021-05-02 20:51:20,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:51:20" (3/4) ... [2021-05-02 20:51:20,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb0324a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:51:20, skipping insertion in model container [2021-05-02 20:51:20,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:51:20" (4/4) ... [2021-05-02 20:51:20,909 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound50.cJordan [2021-05-02 20:51:20,913 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:51:20,916 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:51:20,947 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:51:20,973 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:51:20,974 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:51:20,974 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:51:20,974 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:51:20,974 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:51:20,974 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:51:20,974 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:51:20,974 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:51:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 20:51:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:51:21,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:21,013 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 20:51:21,014 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:21,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1141493127, now seen corresponding path program 1 times [2021-05-02 20:51:21,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:21,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042395949] [2021-05-02 20:51:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:21,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:51:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:21,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:51:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:21,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:51:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:21,270 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 20:51:21,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:21,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042395949] [2021-05-02 20:51:21,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042395949] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:51:21,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:51:21,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:51:21,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128825814] [2021-05-02 20:51:21,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:51:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:21,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:51:21,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:51:21,293 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 20:51:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:21,370 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-05-02 20:51:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:51:21,372 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 20:51:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:21,378 INFO L225 Difference]: With dead ends: 29 [2021-05-02 20:51:21,378 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 20:51:21,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:51:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 20:51:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 20:51:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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 20:51:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-02 20:51:21,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-02 20:51:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:21,408 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-02 20:51:21,408 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 20:51:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-02 20:51:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:51:21,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:21,409 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 20:51:21,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:51:21,410 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1441395781, now seen corresponding path program 1 times [2021-05-02 20:51:21,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:21,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990875008] [2021-05-02 20:51:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:21,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:21,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233219642] [2021-05-02 20:51:21,429 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 20:51:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:51:21,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:21,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:21,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:21,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:21,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:21,816 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 20:51:21,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990875008] [2021-05-02 20:51:21,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233219642] [2021-05-02 20:51:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233219642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:21,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:21,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:51:21,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683670170] [2021-05-02 20:51:21,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:51:21,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:21,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:51:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:51:21,822 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 20:51:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:21,923 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-02 20:51:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:51:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 20:51:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:21,926 INFO L225 Difference]: With dead ends: 32 [2021-05-02 20:51:21,926 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 20:51:21,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:51:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 20:51:21,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 20:51:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 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 20:51:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-02 20:51:21,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-02 20:51:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:21,941 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-02 20:51:21,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 20:51:21,947 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-02 20:51:21,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 20:51:21,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:21,948 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] [2021-05-02 20:51:22,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:51:22,173 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:22,174 INFO L82 PathProgramCache]: Analyzing trace with hash -2044378429, now seen corresponding path program 1 times [2021-05-02 20:51:22,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:22,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602597423] [2021-05-02 20:51:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:22,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:22,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711278004] [2021-05-02 20:51:22,203 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 20:51:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:51:22,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:22,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,410 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 20:51:22,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602597423] [2021-05-02 20:51:22,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711278004] [2021-05-02 20:51:22,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711278004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:22,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:22,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:51:22,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690741809] [2021-05-02 20:51:22,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:51:22,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:51:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:22,413 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 20:51:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:22,519 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 20:51:22,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:51:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 30 [2021-05-02 20:51:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:22,521 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:51:22,521 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:51:22,521 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:51:22,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:51:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:51:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 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 20:51:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 20:51:22,526 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-02 20:51:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:22,527 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 20:51:22,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 20:51:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 20:51:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:51:22,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:22,528 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:22,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:22,743 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1793299131, now seen corresponding path program 2 times [2021-05-02 20:51:22,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:22,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166535689] [2021-05-02 20:51:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:22,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:22,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287520688] [2021-05-02 20:51:22,756 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 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 20:51:22,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:51:22,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 20:51:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:22,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:22,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:25,061 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 20:51:27,385 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:51:27,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:27,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:51:29,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:29,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166535689] [2021-05-02 20:51:29,206 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:29,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287520688] [2021-05-02 20:51:29,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287520688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:29,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:29,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:51:29,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618375723] [2021-05-02 20:51:29,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:51:29,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:29,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:51:29,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:51:29,208 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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 20:51:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:36,512 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-05-02 20:51:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:51:36,513 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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 37 [2021-05-02 20:51:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:36,514 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:51:36,514 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:51:36,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 4508.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:51:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:51:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-05-02 20:51:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 30 states have internal predecessors, (30), 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 20:51:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-02 20:51:36,519 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-05-02 20:51:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:36,519 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-02 20:51:36,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 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 20:51:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-02 20:51:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:51:36,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:36,520 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:36,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:36,721 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:36,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash -492636075, now seen corresponding path program 1 times [2021-05-02 20:51:36,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:36,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715211332] [2021-05-02 20:51:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:36,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:36,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139669794] [2021-05-02 20:51:36,732 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 20:51:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:51:36,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:36,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 20:51:36,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715211332] [2021-05-02 20:51:36,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139669794] [2021-05-02 20:51:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139669794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:36,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:36,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:51:36,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410662722] [2021-05-02 20:51:36,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:51:36,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:51:36,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:51:36,904 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:51:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:38,969 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-05-02 20:51:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:51:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 20:51:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:38,973 INFO L225 Difference]: With dead ends: 48 [2021-05-02 20:51:38,973 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:51:38,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:51:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:51:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:51:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 20:51:38,985 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 43 [2021-05-02 20:51:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:38,985 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 20:51:38,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:51:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 20:51:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:51:38,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:38,988 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:39,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:39,199 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:39,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1935793091, now seen corresponding path program 3 times [2021-05-02 20:51:39,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:39,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283860638] [2021-05-02 20:51:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:39,209 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:39,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618793042] [2021-05-02 20:51:39,210 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 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 20:51:39,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:51:39,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:51:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:41,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:41,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:43,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 20:51:45,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:45,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283860638] [2021-05-02 20:51:45,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618793042] [2021-05-02 20:51:45,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618793042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:45,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:45,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:51:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60070675] [2021-05-02 20:51:45,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:51:45,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:51:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=42, Unknown=1, NotChecked=0, Total=56 [2021-05-02 20:51:45,775 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:52:09,388 WARN L205 SmtUtils]: Spent 19.23 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-02 20:52:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:11,410 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 20:52:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2021-05-02 20:52:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:11,411 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:52:11,411 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:52:11,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 21588.3ms TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2021-05-02 20:52:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:52:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:52:11,411 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 20:52:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:52:11,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2021-05-02 20:52:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:11,412 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:52:11,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:52:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:52:11,412 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:52:11,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:52:11,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:11 BasicIcfg [2021-05-02 20:52:11,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:52:11,632 INFO L168 Benchmark]: Toolchain (without parser) took 51297.29 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 154.9 MB in the beginning and 118.3 MB in the end (delta: 36.6 MB). Peak memory consumption was 76.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:11,634 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 171.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:52:11,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.88 ms. Allocated memory is still 189.8 MB. Free memory was 154.7 MB in the beginning and 173.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:11,634 INFO L168 Benchmark]: Boogie Preprocessor took 20.26 ms. Allocated memory is still 189.8 MB. Free memory was 173.1 MB in the beginning and 171.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:11,634 INFO L168 Benchmark]: RCFGBuilder took 292.99 ms. Allocated memory is still 189.8 MB. Free memory was 171.8 MB in the beginning and 157.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:11,634 INFO L168 Benchmark]: IcfgTransformer took 33.70 ms. Allocated memory is still 189.8 MB. Free memory was 157.3 MB in the beginning and 156.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:11,635 INFO L168 Benchmark]: TraceAbstraction took 50727.64 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 155.7 MB in the beginning and 118.3 MB in the end (delta: 37.4 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:11,636 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 171.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 215.88 ms. Allocated memory is still 189.8 MB. Free memory was 154.7 MB in the beginning and 173.1 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.26 ms. Allocated memory is still 189.8 MB. Free memory was 173.1 MB in the beginning and 171.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.99 ms. Allocated memory is still 189.8 MB. Free memory was 171.8 MB in the beginning and 157.3 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 33.70 ms. Allocated memory is still 189.8 MB. Free memory was 157.3 MB in the beginning and 156.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 50727.64 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 155.7 MB in the beginning and 118.3 MB in the end (delta: 37.4 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 50643.1ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 35.6ms, AutomataDifference: 35329.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 133 SDtfs, 93 SDslu, 542 SDs, 0 SdLazy, 321 SolverSat, 24 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 15684.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 26333.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 64.8ms SsaConstructionTime, 199.3ms SatisfiabilityAnalysisTime, 13531.9ms InterpolantComputationTime, 200 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 0 QuantifiedInterpolants, 727 SizeOfPredicates, 13 NumberOfNonLiveVariables, 687 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 82/103 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...