/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/prodbin-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:08:04,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:08:04,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:08:04,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:08:04,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:08:04,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:08:04,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:08:04,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:08:04,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:08:04,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:08:04,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:08:04,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:08:04,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:08:04,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:08:04,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:08:04,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:08:04,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:08:04,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:08:04,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:08:04,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:08:04,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:08:04,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:08:04,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:08:04,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:08:04,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:08:04,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:08:04,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:08:04,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:08:04,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:08:04,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:08:04,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:08:04,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:08:04,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:08:04,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:08:04,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:08:04,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:08:04,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:08:04,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:08:04,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:08:04,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:08:04,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:08:04,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:08:04,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:08:04,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:08:04,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:08:04,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:08:04,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:08:04,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:08:04,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:08:04,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:08:04,770 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:08:04,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:08:05,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:08:05,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:08:05,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:08:05,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:08:05,079 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:08:05,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2021-05-06 10:08:05,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d2e30c19/4ef4ae73102346e5af4730f802278dda/FLAGd74fc1fc9 [2021-05-06 10:08:05,490 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:08:05,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2021-05-06 10:08:05,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d2e30c19/4ef4ae73102346e5af4730f802278dda/FLAGd74fc1fc9 [2021-05-06 10:08:05,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d2e30c19/4ef4ae73102346e5af4730f802278dda [2021-05-06 10:08:05,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:08:05,923 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:08:05,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:08:05,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:08:05,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:08:05,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:08:05" (1/1) ... [2021-05-06 10:08:05,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43999f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:05, skipping insertion in model container [2021-05-06 10:08:05,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:08:05" (1/1) ... [2021-05-06 10:08:05,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:08:05,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:08:06,106 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/prodbin-ll_unwindbound20.c[537,550] [2021-05-06 10:08:06,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:08:06,123 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:08:06,134 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/prodbin-ll_unwindbound20.c[537,550] [2021-05-06 10:08:06,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:08:06,149 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:08:06,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06 WrapperNode [2021-05-06 10:08:06,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:08:06,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:08:06,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:08:06,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:08:06,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:08:06,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:08:06,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:08:06,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:08:06,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (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 10:08:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:08:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:08:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:08:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:08:06,296 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:08:06,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:08:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:08:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:08:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:08:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:08:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:08:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:08:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:08:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:08:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:08:06,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:08:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:08:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:08:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:08:06,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:08:06,522 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:08:06,522 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:08:06,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:08:06 BoogieIcfgContainer [2021-05-06 10:08:06,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:08:06,524 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:08:06,524 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:08:06,525 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:08:06,527 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:08:06" (1/1) ... [2021-05-06 10:08:06,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:08:06 BasicIcfg [2021-05-06 10:08:06,549 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:08:06,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:08:06,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:08:06,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:08:06,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:08:05" (1/4) ... [2021-05-06 10:08:06,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3b8376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:08:06, skipping insertion in model container [2021-05-06 10:08:06,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:08:06" (2/4) ... [2021-05-06 10:08:06,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3b8376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:08:06, skipping insertion in model container [2021-05-06 10:08:06,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:08:06" (3/4) ... [2021-05-06 10:08:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3b8376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:08:06, skipping insertion in model container [2021-05-06 10:08:06,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:08:06" (4/4) ... [2021-05-06 10:08:06,574 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.cJordan [2021-05-06 10:08:06,579 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:08:06,581 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:08:06,593 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:08:06,618 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:08:06,618 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:08:06,618 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:08:06,619 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:08:06,619 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:08:06,619 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:08:06,619 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:08:06,619 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:08:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:08:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:08:06,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:06,649 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:08:06,649 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-06 10:08:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:06,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987947516] [2021-05-06 10:08:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:06,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:08:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:06,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:08:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:06,890 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 10:08:06,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:06,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987947516] [2021-05-06 10:08:06,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987947516] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:08:06,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:08:06,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:08:06,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610474287] [2021-05-06 10:08:06,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:08:06,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:08:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:08:06,912 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:08:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:08:06,991 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-06 10:08:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:08:06,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:08:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:08:07,001 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:08:07,001 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:08:07,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:08:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:08:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 10:08:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 10:08:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 10:08:07,033 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 10:08:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:08:07,034 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 10:08:07,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:08:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 10:08:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:08:07,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:07,035 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:08:07,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:08:07,036 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:07,037 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-06 10:08:07,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:07,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421545472] [2021-05-06 10:08:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:07,077 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:08:07,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270163508] [2021-05-06 10:08:07,078 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 10:08:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:07,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:08:07,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:08:07,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:07,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:07,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:07,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:07,293 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 10:08:07,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421545472] [2021-05-06 10:08:07,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:08:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270163508] [2021-05-06 10:08:07,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270163508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:08:07,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:08:07,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:08:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278353017] [2021-05-06 10:08:07,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:08:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:08:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:08:07,297 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:08:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:08:07,306 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-06 10:08:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:08:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:08:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:08:07,307 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:08:07,307 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 10:08:07,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:08:07,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 10:08:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 10:08:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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 10:08:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 10:08:07,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-06 10:08:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:08:07,313 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 10:08:07,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:08:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 10:08:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:08:07,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:07,314 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:08:07,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:08:07,533 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-06 10:08:07,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:07,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657339260] [2021-05-06 10:08:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:07,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:08:07,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894924392] [2021-05-06 10:08:07,548 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 10:08:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:08:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:08:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:07,734 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 10:08:07,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657339260] [2021-05-06 10:08:07,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:08:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894924392] [2021-05-06 10:08:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894924392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:08:07,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:08:07,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:08:07,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773235930] [2021-05-06 10:08:07,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:08:07,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:07,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:08:07,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:08:07,737 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:08:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:08:07,797 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:08:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:08:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:08:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:08:07,800 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:08:07,800 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:08:07,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:08:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:08:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-06 10:08:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:08:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:08:07,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:08:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:08:07,812 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:08:07,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:08:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:08:07,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:08:07,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:07,813 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:08:08,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:08:08,014 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1698322804, now seen corresponding path program 1 times [2021-05-06 10:08:08,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:08,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391965978] [2021-05-06 10:08:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:08,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:08:08,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065124604] [2021-05-06 10:08:08,024 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 10:08:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:08:08,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:08:08,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:08:08,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:08,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391965978] [2021-05-06 10:08:08,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:08:08,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065124604] [2021-05-06 10:08:08,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065124604] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:08:08,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:08:08,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:08:08,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523997723] [2021-05-06 10:08:08,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:08:08,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:08,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:08:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:08:08,166 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:08:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:08:08,223 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-06 10:08:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:08:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:08:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:08:08,226 INFO L225 Difference]: With dead ends: 35 [2021-05-06 10:08:08,226 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 10:08:08,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:08:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 10:08:08,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-06 10:08:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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 10:08:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 10:08:08,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2021-05-06 10:08:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:08:08,240 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 10:08:08,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:08:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 10:08:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:08:08,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:08,241 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 10:08:08,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:08:08,444 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-06 10:08:08,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:08,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505472491] [2021-05-06 10:08:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:08,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:08:08,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877051738] [2021-05-06 10:08:08,462 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 10:08:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:08,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:08:08,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:08:08,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:08,625 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 10:08:08,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505472491] [2021-05-06 10:08:08,626 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:08:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877051738] [2021-05-06 10:08:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877051738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:08:08,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:08:08,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:08:08,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247452156] [2021-05-06 10:08:08,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:08:08,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:08,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:08:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:08:08,628 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:08:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:08:08,655 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-06 10:08:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:08:08,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:08:08,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:08:08,657 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:08:08,657 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:08:08,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:08:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:08:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 10:08:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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 10:08:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-06 10:08:08,661 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-06 10:08:08,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:08:08,661 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-06 10:08:08,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:08:08,661 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-06 10:08:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:08:08,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:08,662 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:08:08,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:08:08,881 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-06 10:08:08,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:08,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420884770] [2021-05-06 10:08:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:08,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:08:08,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560377189] [2021-05-06 10:08:08,893 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 10:08:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:08:08,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:08:09,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:08:09,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:09,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420884770] [2021-05-06 10:08:09,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:08:09,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560377189] [2021-05-06 10:08:09,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560377189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:08:09,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:08:09,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:08:09,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719062936] [2021-05-06 10:08:09,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:08:09,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:09,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:08:09,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:08:09,367 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:08:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:08:09,851 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-06 10:08:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:08:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 10:08:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:08:09,852 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:08:09,853 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:08:09,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:08:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:08:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-06 10:08:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:08:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-06 10:08:09,857 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-06 10:08:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:08:09,857 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-06 10:08:09,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:08:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-06 10:08:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:08:09,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:09,858 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:08:10,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:08:10,059 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:10,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-06 10:08:10,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:10,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499586103] [2021-05-06 10:08:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:10,068 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:08:10,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407257540] [2021-05-06 10:08:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:08:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:10,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:08:10,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:08:10,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:10,444 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 10:08:10,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:10,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499586103] [2021-05-06 10:08:10,445 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:08:10,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407257540] [2021-05-06 10:08:10,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407257540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:08:10,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:08:10,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:08:10,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041685806] [2021-05-06 10:08:10,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:08:10,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:10,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:08:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:08:10,446 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:08:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:08:10,611 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-06 10:08:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:08:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 10:08:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:08:10,614 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:08:10,614 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 10:08:10,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:08:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 10:08:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-06 10:08:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:08:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-06 10:08:10,618 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-06 10:08:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:08:10,618 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-06 10:08:10,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:08:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-06 10:08:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:08:10,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:08:10,619 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 10:08:10,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:08:10,833 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:08:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:08:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-06 10:08:10,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:08:10,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901906567] [2021-05-06 10:08:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:08:10,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:08:10,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050205590] [2021-05-06 10:08:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:08:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:08:10,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 10:08:10,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:08:10,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:11,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:08:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:08:11,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:08:11,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901906567] [2021-05-06 10:08:11,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:08:11,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050205590] [2021-05-06 10:08:11,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050205590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:08:11,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:08:11,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:08:11,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787893720] [2021-05-06 10:08:11,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:08:11,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:08:11,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:08:11,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:08:11,036 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)