/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/ps3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:23:11,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:23:11,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:23:11,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:23:11,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:23:11,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:23:11,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:23:11,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:23:11,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:23:11,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:23:11,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:23:11,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:23:11,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:23:11,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:23:11,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:23:11,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:23:11,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:23:11,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:23:11,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:23:11,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:23:11,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:23:11,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:23:11,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:23:11,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:23:11,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:23:11,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:23:11,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:23:11,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:23:11,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:23:11,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:23:11,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:23:11,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:23:11,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:23:11,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:23:11,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:23:11,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:23:11,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:23:11,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:23:11,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:23:11,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:23:11,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:23:11,352 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:23:11,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:23:11,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:23:11,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:23:11,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:23:11,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:23:11,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:23:11,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:23:11,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:23:11,353 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:23:11,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:23:11,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:23:11,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:23:11,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:23:11,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:23:11,577 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:23:11,578 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-06 10:23:11,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5f7a4f6/4f30904c9c6942a594d3527670f6c5e0/FLAGba5b4138f [2021-05-06 10:23:11,984 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:23:11,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_valuebound1.c [2021-05-06 10:23:11,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5f7a4f6/4f30904c9c6942a594d3527670f6c5e0/FLAGba5b4138f [2021-05-06 10:23:12,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5f7a4f6/4f30904c9c6942a594d3527670f6c5e0 [2021-05-06 10:23:12,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:23:12,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:23:12,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:23:12,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:23:12,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:23:12,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4befafe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12, skipping insertion in model container [2021-05-06 10:23:12,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:23:12,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:23:12,524 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/ps3-ll_valuebound1.c[458,471] [2021-05-06 10:23:12,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:23:12,537 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:23:12,544 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/ps3-ll_valuebound1.c[458,471] [2021-05-06 10:23:12,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:23:12,555 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:23:12,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12 WrapperNode [2021-05-06 10:23:12,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:23:12,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:23:12,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:23:12,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:23:12,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:23:12,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:23:12,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:23:12,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:23:12,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (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 10:23:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:23:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:23:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:23:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:23:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:23:12,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:23:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:23:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:23:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:23:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:23:12,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:23:12,800 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:23:12,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:23:12 BoogieIcfgContainer [2021-05-06 10:23:12,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:23:12,802 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:23:12,802 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:23:12,802 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:23:12,805 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:23:12" (1/1) ... [2021-05-06 10:23:12,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:23:12 BasicIcfg [2021-05-06 10:23:12,815 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:23:12,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:23:12,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:23:12,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:23:12,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:23:12" (1/4) ... [2021-05-06 10:23:12,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7500a7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:23:12, skipping insertion in model container [2021-05-06 10:23:12,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:23:12" (2/4) ... [2021-05-06 10:23:12,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7500a7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:23:12, skipping insertion in model container [2021-05-06 10:23:12,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:23:12" (3/4) ... [2021-05-06 10:23:12,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7500a7e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:23:12, skipping insertion in model container [2021-05-06 10:23:12,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:23:12" (4/4) ... [2021-05-06 10:23:12,819 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_valuebound1.cJordan [2021-05-06 10:23:12,822 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:23:12,825 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:23:12,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:23:12,845 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:23:12,845 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:23:12,845 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:23:12,845 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:23:12,845 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:23:12,846 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:23:12,846 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:23:12,846 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:23:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:23:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:23:12,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:12,857 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:12,858 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-06 10:23:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306130245] [2021-05-06 10:23:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:12,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:23:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:12,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:23:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:12,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:12,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306130245] [2021-05-06 10:23:12,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306130245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:23:12,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:23:12,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:23:12,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747146517] [2021-05-06 10:23:13,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:23:13,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:23:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:23:13,011 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:23:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:13,049 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-06 10:23:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:23:13,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:23:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:13,054 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:23:13,055 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 10:23:13,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:23:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 10:23:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 10:23:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:23:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-06 10:23:13,075 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-06 10:23:13,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:13,075 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-06 10:23:13,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:23:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-06 10:23:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:23:13,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:13,076 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:13,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:23:13,076 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-06 10:23:13,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:13,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790768904] [2021-05-06 10:23:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:13,091 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:13,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129403693] [2021-05-06 10:23:13,092 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 10:23:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:13,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:23:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:13,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:13,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:13,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790768904] [2021-05-06 10:23:13,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:13,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129403693] [2021-05-06 10:23:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129403693] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:23:13,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:23:13,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:23:13,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645023037] [2021-05-06 10:23:13,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:23:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:13,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:23:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:23:13,279 INFO L87 Difference]: Start difference. First operand 22 states and 23 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:23:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:13,314 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-06 10:23:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:23:13,315 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:23:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:13,315 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:23:13,315 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 10:23:13,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:23:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 10:23:13,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 10:23:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:23:13,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-06 10:23:13,326 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-06 10:23:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:13,328 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-06 10:23:13,328 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:23:13,328 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-06 10:23:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:23:13,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:13,330 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, 1] [2021-05-06 10:23:13,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:23:13,551 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:13,552 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-06 10:23:13,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:13,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001358480] [2021-05-06 10:23:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:13,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:13,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984476995] [2021-05-06 10:23:13,562 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 10:23:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:23:13,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:23:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:13,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:23:13,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:13,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001358480] [2021-05-06 10:23:13,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:13,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984476995] [2021-05-06 10:23:13,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984476995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:23:13,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:23:13,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:23:13,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262894973] [2021-05-06 10:23:13,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:23:13,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:13,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:23:13,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:23:13,806 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:23:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:13,863 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-06 10:23:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:23:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:23:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:13,865 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:23:13,865 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:23:13,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:23:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:23:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 10:23:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:23:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-06 10:23:13,873 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-06 10:23:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:13,874 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-06 10:23:13,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:23:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-06 10:23:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 10:23:13,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:23:13,875 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:23:14,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:14,091 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:23:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:23:14,091 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-06 10:23:14,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:23:14,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027854710] [2021-05-06 10:23:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:23:14,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:23:14,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301934769] [2021-05-06 10:23:14,101 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 10:23:14,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:23:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:23:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 10:23:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:23:14,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:23:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:23:14,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:23:14,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027854710] [2021-05-06 10:23:14,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:23:14,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301934769] [2021-05-06 10:23:14,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301934769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:23:14,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:23:14,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 10:23:14,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418651608] [2021-05-06 10:23:14,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:23:14,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:23:14,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:23:14,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:23:14,318 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:23:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:23:14,339 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2021-05-06 10:23:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:23:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 10:23:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:23:14,340 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:23:14,340 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:23:14,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:23:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:23:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:23:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 10:23:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:23:14,341 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-05-06 10:23:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:23:14,341 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:23:14,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:23:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:23:14,341 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:23:14,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:23:14,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:23:14 BasicIcfg [2021-05-06 10:23:14,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:23:14,562 INFO L168 Benchmark]: Toolchain (without parser) took 2132.21 ms. Allocated memory was 248.5 MB in the beginning and 394.3 MB in the end (delta: 145.8 MB). Free memory was 213.2 MB in the beginning and 365.4 MB in the end (delta: -152.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:23:14,562 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 248.5 MB. Free memory is still 229.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:23:14,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 125.17 ms. Allocated memory is still 248.5 MB. Free memory was 213.1 MB in the beginning and 203.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:23:14,562 INFO L168 Benchmark]: Boogie Preprocessor took 49.65 ms. Allocated memory is still 248.5 MB. Free memory was 203.4 MB in the beginning and 231.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:23:14,562 INFO L168 Benchmark]: RCFGBuilder took 194.92 ms. Allocated memory is still 248.5 MB. Free memory was 231.1 MB in the beginning and 217.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:23:14,562 INFO L168 Benchmark]: IcfgTransformer took 12.79 ms. Allocated memory is still 248.5 MB. Free memory was 217.4 MB in the beginning and 215.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:23:14,563 INFO L168 Benchmark]: TraceAbstraction took 1745.86 ms. Allocated memory was 248.5 MB in the beginning and 394.3 MB in the end (delta: 145.8 MB). Free memory was 215.9 MB in the beginning and 365.4 MB in the end (delta: -149.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:23:14,563 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 248.5 MB. Free memory is still 229.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 125.17 ms. Allocated memory is still 248.5 MB. Free memory was 213.1 MB in the beginning and 203.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.65 ms. Allocated memory is still 248.5 MB. Free memory was 203.4 MB in the beginning and 231.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 194.92 ms. Allocated memory is still 248.5 MB. Free memory was 231.1 MB in the beginning and 217.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.79 ms. Allocated memory is still 248.5 MB. Free memory was 217.4 MB in the beginning and 215.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1745.86 ms. Allocated memory was 248.5 MB in the beginning and 394.3 MB in the end (delta: 145.8 MB). Free memory was 215.9 MB in the beginning and 365.4 MB in the end (delta: -149.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1714.1ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 8.8ms, AutomataDifference: 180.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 31 SDslu, 197 SDs, 0 SdLazy, 74 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 103.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.6ms SsaConstructionTime, 105.5ms SatisfiabilityAnalysisTime, 496.7ms InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 237 SizeOfPredicates, 4 NumberOfNonLiveVariables, 357 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/19 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...