/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/divbin_valuebound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:15:31,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:15:31,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:15:31,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:15:31,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:15:31,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:15:31,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:15:31,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:15:31,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:15:31,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:15:31,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:15:31,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:15:31,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:15:31,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:15:31,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:15:31,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:15:31,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:15:31,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:15:31,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:15:31,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:15:31,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:15:31,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:15:31,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:15:31,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:15:31,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:15:31,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:15:31,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:15:31,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:15:31,644 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:15:31,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:15:31,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:15:31,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:15:31,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:15:31,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:15:31,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:15:31,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:15:31,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:15:31,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:15:31,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:15:31,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:15:31,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:15:31,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:15:31,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:15:31,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:15:31,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:15:31,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:15:31,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:15:31,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:15:31,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:15:31,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:15:31,654 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:15:31,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:15:31,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:15:31,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:15:31,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:15:31,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:15:31,909 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:15:31,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i [2021-05-02 20:15:31,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd56f187a/a6f1e67d4056407b986178a6fa4616b0/FLAG63832fa2b [2021-05-02 20:15:32,345 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:15:32,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound2.i [2021-05-02 20:15:32,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd56f187a/a6f1e67d4056407b986178a6fa4616b0/FLAG63832fa2b [2021-05-02 20:15:32,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd56f187a/a6f1e67d4056407b986178a6fa4616b0 [2021-05-02 20:15:32,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:15:32,368 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:15:32,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:15:32,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:15:32,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:15:32,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50048daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32, skipping insertion in model container [2021-05-02 20:15:32,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:15:32,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:15:32,509 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/divbin_valuebound2.i[958,971] [2021-05-02 20:15:32,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:15:32,535 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:15:32,560 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/divbin_valuebound2.i[958,971] [2021-05-02 20:15:32,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:15:32,605 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:15:32,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32 WrapperNode [2021-05-02 20:15:32,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:15:32,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:15:32,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:15:32,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:15:32,617 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:15:32,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:15:32,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:15:32,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:15:32,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (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 20:15:32,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:15:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:15:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:15:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:15:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:15:32,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:15:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:15:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:15:32,695 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:15:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:15:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:15:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:15:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:15:32,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:15:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:15:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:15:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:15:32,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:15:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:15:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:15:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:15:32,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:15:32,956 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:15:32,956 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:15:32,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:32 BoogieIcfgContainer [2021-05-02 20:15:32,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:15:32,958 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:15:32,958 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:15:32,958 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:15:32,960 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:32" (1/1) ... [2021-05-02 20:15:32,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:15:32 BasicIcfg [2021-05-02 20:15:32,991 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:15:32,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:15:32,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:15:32,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:15:32,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:15:32" (1/4) ... [2021-05-02 20:15:32,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346e8b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:15:32, skipping insertion in model container [2021-05-02 20:15:32,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:32" (2/4) ... [2021-05-02 20:15:32,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346e8b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:15:32, skipping insertion in model container [2021-05-02 20:15:32,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:32" (3/4) ... [2021-05-02 20:15:32,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346e8b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:15:32, skipping insertion in model container [2021-05-02 20:15:32,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:15:32" (4/4) ... [2021-05-02 20:15:32,996 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.iJordan [2021-05-02 20:15:33,014 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:15:33,016 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:15:33,026 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:15:33,054 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:15:33,055 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:15:33,055 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:15:33,055 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:15:33,055 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:15:33,055 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:15:33,055 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:15:33,055 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:15:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:15:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:15:33,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:33,078 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:15:33,079 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:33,082 INFO L82 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2021-05-02 20:15:33,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:33,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301369726] [2021-05-02 20:15:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:33,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:15:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:33,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:15:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:33,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:15:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:33,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:15:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:33,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:15:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:15:33,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:33,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301369726] [2021-05-02 20:15:33,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301369726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:15:33,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:15:33,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:15:33,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227897707] [2021-05-02 20:15:33,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:15:33,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:33,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:15:33,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:33,320 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:33,375 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:15:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:15:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 20:15:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:33,381 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:15:33,381 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 20:15:33,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 20:15:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 20:15:33,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:15:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 20:15:33,403 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 20:15:33,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:33,403 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 20:15:33,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 20:15:33,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:15:33,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:33,404 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:15:33,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:15:33,405 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2021-05-02 20:15:33,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:33,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606511552] [2021-05-02 20:15:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:33,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:33,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436925767] [2021-05-02 20:15:33,434 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 20:15:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:15:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:15:33,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:33,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606511552] [2021-05-02 20:15:33,807 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:33,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436925767] [2021-05-02 20:15:33,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436925767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:33,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:33,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:15:33,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819812430] [2021-05-02 20:15:33,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:15:33,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:33,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:15:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:15:33,810 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:15:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:33,953 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 20:15:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:15:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 20:15:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:33,961 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:15:33,961 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 20:15:33,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:15:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 20:15:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 20:15:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:15:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 20:15:33,974 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 20:15:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:33,975 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 20:15:33,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:15:33,975 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 20:15:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:15:33,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:33,977 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:15:34,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:15:34,194 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2021-05-02 20:15:34,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:34,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370212412] [2021-05-02 20:15:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:34,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:34,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195452006] [2021-05-02 20:15:34,215 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 20:15:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:15:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:34,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:15:34,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370212412] [2021-05-02 20:15:34,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:34,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195452006] [2021-05-02 20:15:34,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195452006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:34,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:34,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:15:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776929014] [2021-05-02 20:15:34,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:15:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:15:34,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:15:34,562 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:34,768 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 20:15:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:15:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-02 20:15:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:34,770 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:15:34,770 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:15:34,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:15:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:15:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 20:15:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:15:34,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:15:34,774 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 20:15:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:34,774 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:15:34,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:15:34,774 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:15:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:15:34,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:34,775 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:15:34,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:34,993 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2021-05-02 20:15:34,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:34,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637973537] [2021-05-02 20:15:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:35,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:35,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944208924] [2021-05-02 20:15:35,006 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 20:15:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:15:35,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:15:35,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637973537] [2021-05-02 20:15:35,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:35,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944208924] [2021-05-02 20:15:35,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944208924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:15:35,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:15:35,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:15:35,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277173766] [2021-05-02 20:15:35,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:15:35,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:15:35,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:35,096 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:15:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:35,106 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-05-02 20:15:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:15:35,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-02 20:15:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:35,107 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:15:35,107 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:15:35,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:15:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 20:15:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 20:15:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 20:15:35,111 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 20:15:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:35,111 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 20:15:35,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:15:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 20:15:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:15:35,112 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:35,112 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:15:35,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:35,330 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2021-05-02 20:15:35,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:35,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460657508] [2021-05-02 20:15:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:35,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:35,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059309913] [2021-05-02 20:15:35,343 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 20:15:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:15:35,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:35,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:35,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 20:15:35,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460657508] [2021-05-02 20:15:35,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:35,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059309913] [2021-05-02 20:15:35,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059309913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:35,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:35,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:15:35,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935348401] [2021-05-02 20:15:35,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:15:35,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:15:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:15:35,550 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:15:35,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:35,643 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 20:15:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:15:35,644 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-05-02 20:15:35,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:35,644 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:15:35,644 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:15:35,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:15:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:15:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 20:15:35,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:15:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 20:15:35,648 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 45 [2021-05-02 20:15:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:35,648 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 20:15:35,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:15:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 20:15:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 20:15:35,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:35,649 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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 20:15:35,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:35,858 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:35,858 INFO L82 PathProgramCache]: Analyzing trace with hash -575889733, now seen corresponding path program 2 times [2021-05-02 20:15:35,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:35,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653453668] [2021-05-02 20:15:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:35,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:35,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676569257] [2021-05-02 20:15:35,867 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 20:15:36,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:15:36,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:15:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:15:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:36,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:36,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:59,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:00,300 WARN L159 QuantifierPusher]: Ignoring assumption.