/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/fermat2-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:26:30,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:26:30,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:26:30,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:26:30,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:26:30,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:26:30,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:26:30,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:26:30,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:26:30,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:26:30,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:26:30,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:26:30,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:26:30,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:26:30,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:26:30,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:26:30,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:26:30,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:26:30,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:26:30,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:26:30,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:26:30,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:26:30,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:26:30,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:26:30,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:26:30,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:26:30,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:26:30,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:26:30,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:26:30,662 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:26:30,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:26:30,664 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:26:30,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:26:30,665 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:26:30,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:26:30,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:26:30,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:26:30,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:26:30,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:26:30,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:26:30,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:26:30,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:26:30,666 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:26:30,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:26:30,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:26:30,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:26:30,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:26:30,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:26:30,890 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:26:30,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2021-05-06 08:26:30,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c04a884a/d9be5875f2434cd79d3c75f029d3ed19/FLAG58784047f [2021-05-06 08:26:31,293 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:26:31,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound5.c [2021-05-06 08:26:31,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c04a884a/d9be5875f2434cd79d3c75f029d3ed19/FLAG58784047f [2021-05-06 08:26:31,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c04a884a/d9be5875f2434cd79d3c75f029d3ed19 [2021-05-06 08:26:31,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:26:31,713 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:26:31,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:26:31,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:26:31,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:26:31,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dae9f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31, skipping insertion in model container [2021-05-06 08:26:31,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:26:31,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:26:31,806 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/fermat2-ll_unwindbound5.c[524,537] [2021-05-06 08:26:31,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:26:31,819 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:26:31,827 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/fermat2-ll_unwindbound5.c[524,537] [2021-05-06 08:26:31,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:26:31,838 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:26:31,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31 WrapperNode [2021-05-06 08:26:31,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:26:31,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:26:31,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:26:31,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:26:31,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (1/1) ... [2021-05-06 08:26:31,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:26:31,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:26:31,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:26:31,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:26:31,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (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 08:26:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:26:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:26:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:26:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:26:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:26:31,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:26:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:26:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:26:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:26:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:26:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:26:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:26:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:26:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:26:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:26:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:26:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:26:31,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:26:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:26:31,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:26:32,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:26:32,136 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:26:32,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:32 BoogieIcfgContainer [2021-05-06 08:26:32,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:26:32,138 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:26:32,138 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:26:32,138 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:26:32,140 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:32" (1/1) ... [2021-05-06 08:26:32,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:26:32 BasicIcfg [2021-05-06 08:26:32,149 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:26:32,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:26:32,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:26:32,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:26:32,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:26:31" (1/4) ... [2021-05-06 08:26:32,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244a68f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:26:32, skipping insertion in model container [2021-05-06 08:26:32,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:26:31" (2/4) ... [2021-05-06 08:26:32,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244a68f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:26:32, skipping insertion in model container [2021-05-06 08:26:32,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:26:32" (3/4) ... [2021-05-06 08:26:32,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244a68f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:26:32, skipping insertion in model container [2021-05-06 08:26:32,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:26:32" (4/4) ... [2021-05-06 08:26:32,153 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound5.cJordan [2021-05-06 08:26:32,156 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:26:32,158 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:26:32,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:26:32,179 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:26:32,179 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:26:32,179 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:26:32,179 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:26:32,179 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:26:32,179 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:26:32,180 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:26:32,180 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:26:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:26:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:26:32,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:32,192 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:32,192 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:32,196 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-06 08:26:32,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400348916] [2021-05-06 08:26:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:32,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:32,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034302347] [2021-05-06 08:26:32,261 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 08:26:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:26:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 08:26:32,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400348916] [2021-05-06 08:26:32,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:32,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034302347] [2021-05-06 08:26:32,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034302347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:32,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:32,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:26:32,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402456299] [2021-05-06 08:26:32,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:26:32,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:32,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:26:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:26:32,433 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 08:26:32,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:32,445 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-06 08:26:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:26:32,445 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 22 [2021-05-06 08:26:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:32,451 INFO L225 Difference]: With dead ends: 30 [2021-05-06 08:26:32,451 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:26:32,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 08:26:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:26:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:26:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 08:26:32,477 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 08:26:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:32,478 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 08:26:32,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 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 08:26:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 08:26:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:26:32,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:32,479 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:32,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:26:32,694 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-06 08:26:32,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:32,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285060709] [2021-05-06 08:26:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:32,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:32,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109214558] [2021-05-06 08:26:32,734 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 08:26:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:32,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:26:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:32,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:32,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:32,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:32,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:32,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:32,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:32,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285060709] [2021-05-06 08:26:32,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:32,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109214558] [2021-05-06 08:26:32,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109214558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:32,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:32,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:26:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488083498] [2021-05-06 08:26:32,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:26:32,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:26:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:26:32,965 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:32,977 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-06 08:26:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:26:32,978 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:26:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:32,978 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:26:32,978 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:26:32,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:26:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:26:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:26:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 08:26:32,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 08:26:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:32,983 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 08:26:32,983 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:26:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 08:26:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:26:32,987 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:32,987 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:33,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:33,205 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-06 08:26:33,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:33,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043490445] [2021-05-06 08:26:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:33,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:33,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434919922] [2021-05-06 08:26:33,216 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 08:26:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:33,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:26:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:33,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:33,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:33,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:33,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043490445] [2021-05-06 08:26:33,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:33,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434919922] [2021-05-06 08:26:33,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434919922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:26:33,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:26:33,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:26:33,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640267769] [2021-05-06 08:26:33,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:26:33,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:33,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:26:33,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:26:33,457 INFO L87 Difference]: Start difference. First operand 27 states and 31 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:26:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:34,232 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-06 08:26:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:26:34,233 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:26:34,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:34,233 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:26:34,233 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:26:34,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 08:26:34,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:26:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-06 08:26:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:26:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 08:26:34,238 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2021-05-06 08:26:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:34,238 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 08:26:34,239 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:26:34,239 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 08:26:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:26:34,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:34,239 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, 1] [2021-05-06 08:26:34,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:34,449 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:34,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-06 08:26:34,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:34,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782447301] [2021-05-06 08:26:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:34,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:34,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733641412] [2021-05-06 08:26:34,461 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 08:26:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:26:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:34,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:34,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:34,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782447301] [2021-05-06 08:26:34,622 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:34,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733641412] [2021-05-06 08:26:34,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733641412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:34,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:34,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:26:34,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318638624] [2021-05-06 08:26:34,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:26:34,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:26:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:34,624 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:26:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:34,693 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 08:26:34,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:26:34,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:26:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:34,694 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:26:34,694 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:26:34,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:26:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:26:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-05-06 08:26:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:26:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 08:26:34,697 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 08:26:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:34,697 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 08:26:34,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:26:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 08:26:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:26:34,698 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:34,698 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:34,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:34,915 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-06 08:26:34,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:34,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757776456] [2021-05-06 08:26:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:34,967 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:34,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579431275] [2021-05-06 08:26:34,967 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 08:26:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:26:35,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:26:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:35,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:35,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757776456] [2021-05-06 08:26:35,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579431275] [2021-05-06 08:26:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579431275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:35,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:35,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:26:35,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240248276] [2021-05-06 08:26:35,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:26:35,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:26:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:26:35,127 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:26:35,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:35,153 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-06 08:26:35,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:26:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 08:26:35,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:35,154 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:26:35,154 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:26:35,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:26:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:26:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:26:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 08:26:35,157 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 08:26:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:35,158 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 08:26:35,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:26:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 08:26:35,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:26:35,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:35,158 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:35,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:35,380 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-06 08:26:35,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:35,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574389214] [2021-05-06 08:26:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:35,388 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:35,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034038635] [2021-05-06 08:26:35,388 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 08:26:35,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:26:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:35,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:26:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:35,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:35,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574389214] [2021-05-06 08:26:35,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034038635] [2021-05-06 08:26:35,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034038635] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:35,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:35,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:26:35,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175586281] [2021-05-06 08:26:35,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:26:35,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:26:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:26:35,557 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:26:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:35,597 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 08:26:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:26:35,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 08:26:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:35,598 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:26:35,598 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:26:35,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:26:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 08:26:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:26:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 08:26:35,601 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 08:26:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:35,602 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 08:26:35,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:26:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 08:26:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:26:35,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:35,602 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:35,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:35,820 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-06 08:26:35,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:35,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606088135] [2021-05-06 08:26:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:35,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:35,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364919292] [2021-05-06 08:26:35,828 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 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 08:26:36,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:26:36,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:36,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:26:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:36,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:36,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:36,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606088135] [2021-05-06 08:26:36,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:36,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364919292] [2021-05-06 08:26:36,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364919292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:36,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:36,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:26:36,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264219399] [2021-05-06 08:26:36,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:26:36,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:26:36,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:26:36,829 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:26:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:36,876 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-06 08:26:36,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:26:36,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 08:26:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:36,878 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:26:36,878 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:26:36,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:26:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:26:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:26:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:26:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 08:26:36,881 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 08:26:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:36,882 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 08:26:36,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:26:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 08:26:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:26:36,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:36,883 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:37,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:37,090 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 4 times [2021-05-06 08:26:37,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:37,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851591274] [2021-05-06 08:26:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:37,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:37,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827500462] [2021-05-06 08:26:37,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 08:26:37,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:26:37,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:26:37,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:26:37,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:26:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:26:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:26:37,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:26:37,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851591274] [2021-05-06 08:26:37,410 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:26:37,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827500462] [2021-05-06 08:26:37,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827500462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:26:37,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:26:37,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:26:37,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177681721] [2021-05-06 08:26:37,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:26:37,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:26:37,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:26:37,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:26:37,412 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:26:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:26:37,472 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-06 08:26:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:26:37,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 08:26:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:26:37,475 INFO L225 Difference]: With dead ends: 65 [2021-05-06 08:26:37,475 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:26:37,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:26:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:26:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:26:37,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:26:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 08:26:37,485 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 08:26:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:26:37,485 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 08:26:37,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:26:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 08:26:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:26:37,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:26:37,488 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:26:37,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:26:37,709 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:26:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:26:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1572135395, now seen corresponding path program 5 times [2021-05-06 08:26:37,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:26:37,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085437264] [2021-05-06 08:26:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:26:37,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:26:37,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404131638] [2021-05-06 08:26:37,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:37,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:26:37,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 08:26:37,827 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:26:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:26:37,849 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:26:37,956 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:26:37,957 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:26:38,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:26:38,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:26:38 BasicIcfg [2021-05-06 08:26:38,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:26:38,197 INFO L168 Benchmark]: Toolchain (without parser) took 6485.03 ms. Allocated memory was 177.2 MB in the beginning and 222.3 MB in the end (delta: 45.1 MB). Free memory was 142.7 MB in the beginning and 81.3 MB in the end (delta: 61.5 MB). Peak memory consumption was 107.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:26:38,198 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 177.2 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:26:38,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.85 ms. Allocated memory is still 177.2 MB. Free memory was 142.5 MB in the beginning and 132.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:26:38,198 INFO L168 Benchmark]: Boogie Preprocessor took 56.64 ms. Allocated memory is still 177.2 MB. Free memory was 132.8 MB in the beginning and 161.5 MB in the end (delta: -28.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:26:38,198 INFO L168 Benchmark]: RCFGBuilder took 239.89 ms. Allocated memory is still 177.2 MB. Free memory was 161.4 MB in the beginning and 146.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:26:38,198 INFO L168 Benchmark]: IcfgTransformer took 11.32 ms. Allocated memory is still 177.2 MB. Free memory was 146.4 MB in the beginning and 145.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:26:38,198 INFO L168 Benchmark]: TraceAbstraction took 6047.29 ms. Allocated memory was 177.2 MB in the beginning and 222.3 MB in the end (delta: 45.1 MB). Free memory was 144.7 MB in the beginning and 81.3 MB in the end (delta: 63.4 MB). Peak memory consumption was 109.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:26:38,198 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 177.2 MB. Free memory is still 159.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 123.85 ms. Allocated memory is still 177.2 MB. Free memory was 142.5 MB in the beginning and 132.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.64 ms. Allocated memory is still 177.2 MB. Free memory was 132.8 MB in the beginning and 161.5 MB in the end (delta: -28.7 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 239.89 ms. Allocated memory is still 177.2 MB. Free memory was 161.4 MB in the beginning and 146.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.32 ms. Allocated memory is still 177.2 MB. Free memory was 146.4 MB in the beginning and 145.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6047.29 ms. Allocated memory was 177.2 MB in the beginning and 222.3 MB in the end (delta: 45.1 MB). Free memory was 144.7 MB in the beginning and 81.3 MB in the end (delta: 63.4 MB). Peak memory consumption was 109.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=14, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(counter)=0, A=2305, counter=0, R=49] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=2305, counter=0, R=49] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [\old(counter)=0, A=2305, counter=0, r=96, R=49, u=99, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=2305, counter=1, counter++=0, r=96, R=49, u=99, v=1] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=2305, counter=1, r=96, R=49, u=99, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=2305, counter=1, r=96, R=49, u=99, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=2305, counter=1, r=95, R=49, u=99, v=3] [L34] EXPR counter++ VAL [\old(counter)=0, A=2305, counter=2, counter++=1, r=95, R=49, u=99, v=3] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=2305, counter=2, r=95, R=49, u=99, v=3] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=2305, counter=2, R=49, r=95, u=99, v=3] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=2305, counter=2, r=92, R=49, u=99, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=2305, counter=3, counter++=2, R=49, r=92, u=99, v=5] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=2305, counter=3, r=92, R=49, u=99, v=5] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=2305, counter=3, R=49, r=92, u=99, v=5] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=2305, counter=3, R=49, r=87, u=99, v=7] [L34] EXPR counter++ VAL [\old(counter)=0, A=2305, counter=4, counter++=3, r=87, R=49, u=99, v=7] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=2305, counter=4, r=87, R=49, u=99, v=7] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=2305, counter=4, R=49, r=87, u=99, v=7] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=2305, counter=4, r=80, R=49, u=99, v=9] [L34] EXPR counter++ VAL [\old(counter)=0, A=2305, counter=5, counter++=4, R=49, r=80, u=99, v=9] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=2305, counter=5, R=49, r=80, u=99, v=9] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=2305, counter=5, R=49, r=80, u=99, v=9] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=2305, counter=5, R=49, r=71, u=99, v=11] [L34] EXPR counter++ VAL [\old(counter)=0, A=2305, counter=6, counter++=5, r=71, R=49, u=99, v=11] [L34] COND FALSE !(counter++<5) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5979.9ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 16.1ms, AutomataDifference: 1079.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 220 SDtfs, 95 SDslu, 451 SDs, 0 SdLazy, 161 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 878.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 194.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=8, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.4ms AutomataMinimizationTime, 8 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 80.9ms SsaConstructionTime, 1234.1ms SatisfiabilityAnalysisTime, 887.4ms InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 271 ConstructedInterpolants, 0 QuantifiedInterpolants, 749 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1223 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 53/164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...