/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/geo3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:43:35,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:43:35,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:43:35,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:43:35,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:43:35,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:43:35,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:43:35,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:43:35,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:43:35,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:43:35,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:43:35,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:43:35,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:43:35,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:43:35,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:43:35,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:43:35,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:43:35,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:43:35,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:43:35,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:43:35,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:43:35,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:43:35,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:43:35,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:43:35,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:43:35,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:43:35,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:43:35,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:43:35,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:43:35,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:43:35,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:43:35,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:43:35,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:43:35,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:43:35,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:43:35,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:43:35,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:43:35,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:43:35,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:43:35,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:43:35,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:43:35,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:43:35,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:43:35,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:43:35,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:43:35,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:43:35,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:43:35,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:43:35,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:43:35,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:43:35,619 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:43:35,619 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:43:35,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:43:35,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:43:35,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:43:35,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:43:35,888 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:43:35,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2021-05-06 08:43:35,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a77f9523/4ccfdcd21d774e8080cc784101fd1bc6/FLAG5e954cb4b [2021-05-06 08:43:36,313 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:43:36,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound5.c [2021-05-06 08:43:36,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a77f9523/4ccfdcd21d774e8080cc784101fd1bc6/FLAG5e954cb4b [2021-05-06 08:43:36,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a77f9523/4ccfdcd21d774e8080cc784101fd1bc6 [2021-05-06 08:43:36,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:43:36,331 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:43:36,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:43:36,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:43:36,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:43:36,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@669b65e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36, skipping insertion in model container [2021-05-06 08:43:36,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:43:36,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:43:36,442 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/geo3-ll_unwindbound5.c[525,538] [2021-05-06 08:43:36,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:43:36,470 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:43:36,511 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/geo3-ll_unwindbound5.c[525,538] [2021-05-06 08:43:36,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:43:36,534 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:43:36,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36 WrapperNode [2021-05-06 08:43:36,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:43:36,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:43:36,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:43:36,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:43:36,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:43:36,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:43:36,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:43:36,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:43:36,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (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 [2021-05-06 08:43:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:43:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:43:36,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:43:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:43:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:43:36,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:43:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:43:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:43:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:43:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:43:36,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:43:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:43:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:43:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:43:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:43:36,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:43:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:43:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:43:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:43:36,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:43:36,884 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:43:36,884 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:43:36,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:43:36 BoogieIcfgContainer [2021-05-06 08:43:36,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:43:36,886 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:43:36,886 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:43:36,886 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:43:36,888 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:43:36" (1/1) ... [2021-05-06 08:43:36,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:43:36 BasicIcfg [2021-05-06 08:43:36,918 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:43:36,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:43:36,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:43:36,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:43:36,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:43:36" (1/4) ... [2021-05-06 08:43:36,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770d262f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:43:36, skipping insertion in model container [2021-05-06 08:43:36,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:43:36" (2/4) ... [2021-05-06 08:43:36,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770d262f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:43:36, skipping insertion in model container [2021-05-06 08:43:36,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:43:36" (3/4) ... [2021-05-06 08:43:36,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@770d262f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:43:36, skipping insertion in model container [2021-05-06 08:43:36,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:43:36" (4/4) ... [2021-05-06 08:43:36,922 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound5.cJordan [2021-05-06 08:43:36,926 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:43:36,928 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:43:36,955 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:43:36,967 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:43:36,967 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:43:36,967 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:43:36,967 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:43:36,968 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:43:36,968 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:43:36,968 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:43:36,968 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:43:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:43:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:43:36,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:36,989 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:36,990 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:43:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:37,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198637111] [2021-05-06 08:43:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:37,074 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:37,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213336131] [2021-05-06 08:43:37,075 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 [2021-05-06 08:43:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:37,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:43:37,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:37,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:37,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198637111] [2021-05-06 08:43:37,220 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:37,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213336131] [2021-05-06 08:43:37,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213336131] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:43:37,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:43:37,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:43:37,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939689305] [2021-05-06 08:43:37,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:43:37,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:43:37,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:43:37,237 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:37,248 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 08:43:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:43:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 08:43:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:37,255 INFO L225 Difference]: With dead ends: 22 [2021-05-06 08:43:37,255 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 08:43:37,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:43:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 08:43:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 08:43:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:37,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:43:37,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:43:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:37,281 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:43:37,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:43:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:43:37,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:37,282 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:37,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:43:37,485 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:37,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:43:37,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:37,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324542693] [2021-05-06 08:43:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:37,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:37,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371618299] [2021-05-06 08:43:37,498 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 [2021-05-06 08:43:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:43:37,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:37,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:37,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:37,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324542693] [2021-05-06 08:43:37,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:37,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371618299] [2021-05-06 08:43:37,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371618299] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:43:37,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:43:37,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:43:37,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6851609] [2021-05-06 08:43:37,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:43:37,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:43:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:43:37,673 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:37,681 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:43:37,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:43:37,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:43:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:37,682 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:43:37,682 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:43:37,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:43:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:43:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:43:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:43:37,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:43:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:37,685 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:43:37,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:43:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:43:37,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:37,686 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:37,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:37,893 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:43:37,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:37,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839897969] [2021-05-06 08:43:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:37,905 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:37,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395896543] [2021-05-06 08:43:37,905 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 [2021-05-06 08:43:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:37,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:43:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:38,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:38,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:38,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839897969] [2021-05-06 08:43:38,019 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:38,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395896543] [2021-05-06 08:43:38,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395896543] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:43:38,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:43:38,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:43:38,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405015140] [2021-05-06 08:43:38,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:43:38,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:43:38,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:43:38,020 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:38,062 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:43:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:43:38,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:43:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:38,063 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:43:38,063 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:43:38,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:43:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:43:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:43:38,066 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:43:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:38,067 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:43:38,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:43:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:43:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:43:38,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:38,067 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:38,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:38,273 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:43:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:38,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508486650] [2021-05-06 08:43:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:38,282 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:38,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469086435] [2021-05-06 08:43:38,282 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 [2021-05-06 08:43:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:38,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:43:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:38,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:38,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:38,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508486650] [2021-05-06 08:43:38,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:38,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469086435] [2021-05-06 08:43:38,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469086435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:38,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:38,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:43:38,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014057209] [2021-05-06 08:43:38,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:43:38,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:38,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:43:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:43:38,410 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:38,430 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:43:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:43:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:43:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:38,431 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:43:38,431 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:43:38,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:43:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:43:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:43:38,434 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:43:38,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:38,434 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:43:38,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:43:38,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:43:38,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:38,435 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:38,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:38,641 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:38,641 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:43:38,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:38,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688698297] [2021-05-06 08:43:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:38,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:38,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198199710] [2021-05-06 08:43:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:43:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:43:38,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:43:38,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:38,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:38,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688698297] [2021-05-06 08:43:38,857 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:38,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198199710] [2021-05-06 08:43:38,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198199710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:38,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:38,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:43:38,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844725023] [2021-05-06 08:43:38,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:43:38,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:43:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:38,858 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:38,900 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:43:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:43:38,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:43:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:38,903 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:43:38,904 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:43:38,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:43:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:43:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:43:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:43:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:43:38,918 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:43:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:38,918 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:43:38,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:43:38,919 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:43:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:43:38,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:38,920 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:39,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:39,133 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:43:39,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:39,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279471676] [2021-05-06 08:43:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:39,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:39,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525888146] [2021-05-06 08:43:39,142 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:39,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:43:39,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:43:39,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:43:39,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:39,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:43:39,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:39,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279471676] [2021-05-06 08:43:39,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:39,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525888146] [2021-05-06 08:43:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525888146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:39,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:39,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:43:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192193563] [2021-05-06 08:43:39,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:43:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:43:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:43:39,311 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:39,349 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-06 08:43:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:43:39,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:43:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:39,351 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:43:39,351 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:43:39,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:43:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:43:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:43:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:43:39,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 08:43:39,358 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 08:43:39,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:39,358 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 08:43:39,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 08:43:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:43:39,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:39,358 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:39,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:39,562 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-06 08:43:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:39,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933681078] [2021-05-06 08:43:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:39,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:39,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121877740] [2021-05-06 08:43:39,569 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:39,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:43:39,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:43:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:43:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:43:39,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:39,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933681078] [2021-05-06 08:43:39,782 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:39,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121877740] [2021-05-06 08:43:39,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121877740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:39,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:39,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:43:39,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635705024] [2021-05-06 08:43:39,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:43:39,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:39,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:43:39,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:43:39,783 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:43:39,993 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-06 08:43:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:43:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:43:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:43:39,998 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:43:39,998 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:43:39,998 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:43:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:43:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:43:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:43:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:43:40,001 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:43:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:43:40,001 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:43:40,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:43:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:43:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:43:40,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:43:40,002 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:43:40,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:40,209 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:43:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:43:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:43:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:43:40,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401085223] [2021-05-06 08:43:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:43:40,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:43:40,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397072056] [2021-05-06 08:43:40,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:43:40,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:43:40,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:43:40,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:43:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:43:40,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:40,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:40,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:40,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:40,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:43:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:43:40,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:43:40,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401085223] [2021-05-06 08:43:40,461 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:43:40,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397072056] [2021-05-06 08:43:40,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397072056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:43:40,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:43:40,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:43:40,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476745377] [2021-05-06 08:43:40,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:43:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:43:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:43:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:43:40,462 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)