/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/ps5-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:39:14,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:39:14,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:39:14,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:39:14,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:39:14,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:39:14,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:39:14,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:39:14,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:39:14,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:39:14,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:39:14,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:39:14,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:39:14,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:39:14,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:39:14,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:39:14,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:39:14,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:39:14,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:39:14,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:39:14,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:39:14,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:39:14,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:39:14,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:39:14,181 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:39:14,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:39:14,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:39:14,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:39:14,189 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:39:14,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:39:14,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:39:14,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:39:14,203 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:39:14,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:39:14,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:39:14,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:39:14,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:39:14,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:39:14,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:39:14,204 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:39:14,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:39:14,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:39:14,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:39:14,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:39:14,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:39:14,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:39:14,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:39:14,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:39:14,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:39:14,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:39:14,206 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:39:14,206 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:39:14,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:39:14,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:39:14,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:39:14,475 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:39:14,476 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:39:14,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound50.c [2021-05-06 10:39:14,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4a5b476e/28222a63a5cd4d9d8aa5e0dbc23c7318/FLAG7fff883ae [2021-05-06 10:39:14,866 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:39:14,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound50.c [2021-05-06 10:39:14,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4a5b476e/28222a63a5cd4d9d8aa5e0dbc23c7318/FLAG7fff883ae [2021-05-06 10:39:14,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4a5b476e/28222a63a5cd4d9d8aa5e0dbc23c7318 [2021-05-06 10:39:14,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:39:14,891 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:39:14,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:39:14,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:39:14,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:39:14,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:39:14" (1/1) ... [2021-05-06 10:39:14,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eee6f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:14, skipping insertion in model container [2021-05-06 10:39:14,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:39:14" (1/1) ... [2021-05-06 10:39:14,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:39:14,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:39:15,025 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/ps5-ll_valuebound50.c[458,471] [2021-05-06 10:39:15,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:39:15,046 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:39:15,094 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/ps5-ll_valuebound50.c[458,471] [2021-05-06 10:39:15,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:39:15,118 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:39:15,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15 WrapperNode [2021-05-06 10:39:15,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:39:15,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:39:15,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:39:15,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:39:15,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:39:15,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:39:15,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:39:15,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:39:15,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:39:15,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:39:15,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:39:15,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:39:15,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:39:15,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:39:15,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:39:15,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:39:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:39:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:39:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:39:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:39:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:39:15,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:39:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:39:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:39:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:39:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:39:15,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:39:15,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:39:15,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:39:15,379 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:39:15,379 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:39:15,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:39:15 BoogieIcfgContainer [2021-05-06 10:39:15,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:39:15,380 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:39:15,380 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:39:15,381 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:39:15,382 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:39:15" (1/1) ... [2021-05-06 10:39:15,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:39:15 BasicIcfg [2021-05-06 10:39:15,391 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:39:15,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:39:15,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:39:15,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:39:15,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:39:14" (1/4) ... [2021-05-06 10:39:15,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16820e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:39:15, skipping insertion in model container [2021-05-06 10:39:15,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:39:15" (2/4) ... [2021-05-06 10:39:15,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16820e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:39:15, skipping insertion in model container [2021-05-06 10:39:15,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:39:15" (3/4) ... [2021-05-06 10:39:15,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16820e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:39:15, skipping insertion in model container [2021-05-06 10:39:15,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:39:15" (4/4) ... [2021-05-06 10:39:15,396 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound50.cJordan [2021-05-06 10:39:15,399 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:39:15,402 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:39:15,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:39:15,423 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:39:15,423 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:39:15,423 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:39:15,423 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:39:15,423 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:39:15,423 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:39:15,424 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:39:15,424 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:39:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:39:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:39:15,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:39:15,436 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 10:39:15,436 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:39:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:39:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:39:15,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:39:15,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439123824] [2021-05-06 10:39:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:39:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:39:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:39:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:39:15,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:39:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:39:15,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:39:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:39:15,614 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 10:39:15,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:39:15,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439123824] [2021-05-06 10:39:15,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439123824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:39:15,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:39:15,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:39:15,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076339465] [2021-05-06 10:39:15,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:39:15,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:39:15,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:39:15,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:39:15,627 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:39:15,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:39:15,682 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:39:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:39:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 10:39:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:39:15,689 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:39:15,689 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:39:15,690 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:39:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:39:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:39:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:39:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:39:15,716 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:39:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:39:15,716 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:39:15,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:39:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:39:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:39:15,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:39:15,718 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 10:39:15,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:39:15,718 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:39:15,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:39:15,725 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:39:15,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:39:15,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313844810] [2021-05-06 10:39:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:39:15,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:39:15,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86057209] [2021-05-06 10:39:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:39:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:39:15,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:39:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:39:15,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:15,934 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 10:39:15,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:39:15,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313844810] [2021-05-06 10:39:15,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:39:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86057209] [2021-05-06 10:39:15,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86057209] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:39:15,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:39:15,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:39:15,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454057036] [2021-05-06 10:39:15,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:39:15,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:39:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:39:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:39:15,937 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 10:39:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:39:15,965 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:39:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:39:15,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 22 [2021-05-06 10:39:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:39:15,966 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:39:15,966 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:39:15,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:39:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:39:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:39:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:39:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:39:15,971 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:39:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:39:15,971 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:39:15,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 10:39:15,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:39:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:39:15,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:39:15,972 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:39:16,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:39:16,177 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:39:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:39:16,177 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:39:16,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:39:16,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812169406] [2021-05-06 10:39:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:39:16,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:39:16,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843636368] [2021-05-06 10:39:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:39:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:39:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:39:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:39:16,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:16,378 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 10:39:16,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:39:16,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812169406] [2021-05-06 10:39:16,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:39:16,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843636368] [2021-05-06 10:39:16,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843636368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:39:16,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:39:16,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:39:16,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887506112] [2021-05-06 10:39:16,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:39:16,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:39:16,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:39:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:39:16,380 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:39:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:39:16,434 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:39:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:39:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 10:39:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:39:16,436 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:39:16,436 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:39:16,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:39:16,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:39:16,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:39:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:39:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:39:16,440 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:39:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:39:16,440 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:39:16,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:39:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:39:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:39:16,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:39:16,441 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:39:16,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:39:16,652 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:39:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:39:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:39:16,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:39:16,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918192012] [2021-05-06 10:39:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:39:16,666 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:39:16,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717549852] [2021-05-06 10:39:16,667 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:39:16,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:39:16,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:39:16,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:39:16,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:39:16,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 10:39:16,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:39:16,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918192012] [2021-05-06 10:39:16,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:39:16,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717549852] [2021-05-06 10:39:16,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717549852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:39:16,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:39:16,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:39:16,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479716611] [2021-05-06 10:39:16,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:39:16,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:39:16,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:39:16,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:39:16,971 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:39:17,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:39:17,311 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:39:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:39:17,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 10:39:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:39:17,312 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:39:17,312 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:39:17,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:39:17,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:39:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:39:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:39:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:39:17,317 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:39:17,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:39:17,317 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:39:17,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:39:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:39:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:39:17,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:39:17,318 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:39:17,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:39:17,522 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:39:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:39:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:39:17,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:39:17,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168889127] [2021-05-06 10:39:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:39:17,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:39:17,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886539045] [2021-05-06 10:39:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:39:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:39:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:39:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:39:17,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:39:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:39:17,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:39:17,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168889127] [2021-05-06 10:39:17,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:39:17,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886539045] [2021-05-06 10:39:17,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886539045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:39:17,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:39:17,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:39:17,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283461233] [2021-05-06 10:39:17,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:39:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:39:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:39:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:39:17,764 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:39:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:39:17,811 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:39:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:39:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:39:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:39:17,813 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:39:17,813 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:39:17,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:39:17,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:39:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:39:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:39:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:39:17,818 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:39:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:39:17,818 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:39:17,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:39:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:39:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:39:17,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:39:17,819 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:39:18,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:39:18,025 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:39:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:39:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:39:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:39:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352249949] [2021-05-06 10:39:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:39:18,036 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:39:18,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667964270] [2021-05-06 10:39:18,036 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 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