/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_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:15:35,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:15:35,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:15:35,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:15:35,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:15:35,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:15:35,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:15:35,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:15:35,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:15:35,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:15:35,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:15:35,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:15:35,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:15:35,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:15:35,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:15:35,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:15:35,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:15:35,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:15:35,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:15:35,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:15:35,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:15:35,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:15:35,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:15:35,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:15:35,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:15:35,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:15:35,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:15:35,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:15:35,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:15:35,622 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:15:35,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:15:35,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:15:35,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:15:35,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:15:35,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:15:35,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:15:35,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:15:35,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:15:35,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:15:35,625 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:15:35,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:15:35,626 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:15:35,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:15:35,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:15:35,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:15:35,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:15:35,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:15:35,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:15:35,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:15:35,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:15:35,628 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:15:35,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:15:35,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:15:35,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:15:35,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:15:35,961 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:15:35,961 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:15:35,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound20.i [2021-05-02 20:15:36,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9af28110/672be060321a4332bb109aab10d1f3c6/FLAGa3f570de3 [2021-05-02 20:15:36,416 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:15:36,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound20.i [2021-05-02 20:15:36,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9af28110/672be060321a4332bb109aab10d1f3c6/FLAGa3f570de3 [2021-05-02 20:15:36,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9af28110/672be060321a4332bb109aab10d1f3c6 [2021-05-02 20:15:36,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:15:36,444 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:15:36,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:15:36,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:15:36,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:15:36,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e672664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36, skipping insertion in model container [2021-05-02 20:15:36,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:15:36,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:15:36,631 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_valuebound20.i[958,971] [2021-05-02 20:15:36,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:15:36,668 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:15:36,692 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_valuebound20.i[958,971] [2021-05-02 20:15:36,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:15:36,740 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:15:36,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36 WrapperNode [2021-05-02 20:15:36,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:15:36,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:15:36,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:15:36,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:15:36,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (1/1) ... [2021-05-02 20:15:36,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:15:36,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:15:36,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:15:36,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:15:36,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (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 20:15:36,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:15:36,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:15:36,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:15:36,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:15:36,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:15:36,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:15:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:15:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:15:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:15:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:15:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:15:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:15:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:15:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:15:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:15:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:15:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:15:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:15:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:15:36,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:15:36,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:15:36,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:15:37,160 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:15:37,160 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:15:37,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:37 BoogieIcfgContainer [2021-05-02 20:15:37,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:15:37,162 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:15:37,162 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:15:37,163 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:15:37,165 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:37" (1/1) ... [2021-05-02 20:15:37,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:15:37 BasicIcfg [2021-05-02 20:15:37,180 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:15:37,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:15:37,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:15:37,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:15:37,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:15:36" (1/4) ... [2021-05-02 20:15:37,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619cc9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:15:37, skipping insertion in model container [2021-05-02 20:15:37,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:15:36" (2/4) ... [2021-05-02 20:15:37,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619cc9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:15:37, skipping insertion in model container [2021-05-02 20:15:37,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:15:37" (3/4) ... [2021-05-02 20:15:37,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@619cc9b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:15:37, skipping insertion in model container [2021-05-02 20:15:37,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:15:37" (4/4) ... [2021-05-02 20:15:37,186 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.iJordan [2021-05-02 20:15:37,191 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:15:37,194 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:15:37,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:15:37,267 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:15:37,267 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:15:37,267 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:15:37,268 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:15:37,268 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:15:37,268 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:15:37,268 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:15:37,268 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:15:37,295 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 20:15:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:15:37,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:37,302 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 20:15:37,303 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:37,307 INFO L82 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2021-05-02 20:15:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:37,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020788257] [2021-05-02 20:15:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:37,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:15:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:37,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:15:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:37,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:15:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:37,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:15:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:37,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:15:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:37,631 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 20:15:37,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:37,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020788257] [2021-05-02 20:15:37,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020788257] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:15:37,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:15:37,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:15:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978512399] [2021-05-02 20:15:37,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:15:37,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:37,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:15:37,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:37,653 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 20:15:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:37,780 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:15:37,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:15:37,782 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 20:15:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:37,789 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:15:37,789 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 20:15:37,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 20:15:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 20:15:37,824 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 20:15:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 20:15:37,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 20:15:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:37,828 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 20:15:37,828 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 20:15:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 20:15:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:15:37,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:37,830 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 20:15:37,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:15:37,831 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2021-05-02 20:15:37,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:37,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378556539] [2021-05-02 20:15:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:37,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:37,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878482419] [2021-05-02 20:15:37,860 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 20:15:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:15:37,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:38,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:38,436 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 20:15:38,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:38,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378556539] [2021-05-02 20:15:38,436 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:38,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878482419] [2021-05-02 20:15:38,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878482419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:38,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:38,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:15:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98127320] [2021-05-02 20:15:38,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:15:38,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:38,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:15:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:15:38,441 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 20:15:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:38,744 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 20:15:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:15:38,752 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 20:15:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:38,755 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:15:38,755 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 20:15:38,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:15:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 20:15:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 20:15:38,768 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 20:15:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 20:15:38,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 20:15:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:38,772 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 20:15:38,772 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 20:15:38,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 20:15:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 20:15:38,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:38,775 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 20:15:38,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:15:38,993 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2021-05-02 20:15:38,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:38,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088980284] [2021-05-02 20:15:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:39,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:39,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571440846] [2021-05-02 20:15:39,012 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 20:15:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:15:39,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:39,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:39,380 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 20:15:39,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:39,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088980284] [2021-05-02 20:15:39,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:39,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571440846] [2021-05-02 20:15:39,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571440846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:39,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:39,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:15:39,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41976036] [2021-05-02 20:15:39,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:15:39,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:15:39,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:15:39,383 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 20:15:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:39,633 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-02 20:15:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:15:39,634 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 20:15:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:39,635 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:15:39,635 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:15:39,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:15:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:15:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 20:15:39,640 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 20:15:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:15:39,641 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 20:15:39,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:39,641 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:15:39,642 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 20:15:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:15:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:15:39,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:39,643 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 20:15:39,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:39,869 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:39,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2021-05-02 20:15:39,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:39,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608500322] [2021-05-02 20:15:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:39,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:39,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932687001] [2021-05-02 20:15:39,882 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 20:15:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:39,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:15:39,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:40,010 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 20:15:40,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608500322] [2021-05-02 20:15:40,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932687001] [2021-05-02 20:15:40,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932687001] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:15:40,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:15:40,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:15:40,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835962054] [2021-05-02 20:15:40,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:15:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:40,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:15:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:40,012 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 20:15:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:40,031 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-05-02 20:15:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:15:40,032 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 20:15:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:40,033 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:15:40,033 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 20:15:40,033 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:15:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 20:15:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 20:15:40,036 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 20:15:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 20:15:40,037 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 20:15:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:40,038 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 20:15:40,038 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 20:15:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 20:15:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:15:40,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:40,039 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 20:15:40,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:40,253 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:40,253 INFO L82 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2021-05-02 20:15:40,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:40,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433667643] [2021-05-02 20:15:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:40,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:40,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739950268] [2021-05-02 20:15:40,262 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 20:15:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:15:40,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:15:40,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:40,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:40,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,149 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 31 [2021-05-02 20:15:41,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:15:41,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:15:41,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433667643] [2021-05-02 20:15:41,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:15:41,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739950268] [2021-05-02 20:15:41,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739950268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:15:41,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:15:41,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:15:41,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969175753] [2021-05-02 20:15:41,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:15:41,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:15:41,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:15:41,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:15:41,532 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:15:42,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:15:42,823 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-05-02 20:15:42,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:15:42,824 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), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-05-02 20:15:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:15:42,825 INFO L225 Difference]: With dead ends: 47 [2021-05-02 20:15:42,825 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:15:42,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 719.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:15:42,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:15:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 20:15:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 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 20:15:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 20:15:42,830 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 45 [2021-05-02 20:15:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:15:42,830 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 20:15:42,830 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), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 20:15:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 20:15:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 20:15:42,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:15:42,831 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 20:15:43,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:15:43,035 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:15:43,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:15:43,035 INFO L82 PathProgramCache]: Analyzing trace with hash -575889733, now seen corresponding path program 2 times [2021-05-02 20:15:43,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:15:43,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670413004] [2021-05-02 20:15:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:15:43,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:15:43,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683975748] [2021-05-02 20:15:43,062 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 20:15:43,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:15:43,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:15:43,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:15:43,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:15:43,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:43,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:44,621 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 34 [2021-05-02 20:15:45,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:45,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:15:46,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:16:17,236 WARN L159 QuantifierPusher]: Ignoring assumption.