/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:25:44,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:25:44,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:25:44,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:25:44,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:25:44,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:25:44,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:25:44,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:25:44,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:25:44,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:25:44,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:25:44,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:25:44,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:25:44,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:25:44,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:25:44,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:25:44,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:25:44,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:25:44,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:25:44,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:25:44,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:25:44,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:25:44,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:25:44,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:25:44,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:25:44,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:25:44,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:25:44,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:25:44,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:25:44,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:25:44,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:25:44,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:25:44,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:25:44,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:25:44,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:25:44,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:25:44,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:25:44,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:25:44,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:25:44,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:25:44,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:25:44,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:25:44,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:25:44,204 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:25:44,204 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:25:44,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:25:44,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:25:44,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:25:44,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:25:44,487 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:25:44,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-05-06 08:25:44,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad719a7e/cd647a55fd374404a6e70f58747b1dd4/FLAGbfa81471b [2021-05-06 08:25:44,905 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:25:44,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-05-06 08:25:44,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad719a7e/cd647a55fd374404a6e70f58747b1dd4/FLAGbfa81471b [2021-05-06 08:25:44,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad719a7e/cd647a55fd374404a6e70f58747b1dd4 [2021-05-06 08:25:44,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:25:44,935 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:25:44,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:25:44,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:25:44,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:25:44,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:25:44" (1/1) ... [2021-05-06 08:25:44,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb33306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:44, skipping insertion in model container [2021-05-06 08:25:44,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:25:44" (1/1) ... [2021-05-06 08:25:44,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:25:44,960 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:25:45,081 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c[524,537] [2021-05-06 08:25:45,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:25:45,101 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:25:45,113 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c[524,537] [2021-05-06 08:25:45,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:25:45,137 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:25:45,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45 WrapperNode [2021-05-06 08:25:45,138 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:25:45,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:25:45,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:25:45,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:25:45,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:25:45,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:25:45,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:25:45,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:25:45,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:25:45,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:25:45,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:25:45,274 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:25:45,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:25:45,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:25:45,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:25:45,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:25:45,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:25:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:25:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:25:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:25:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:25:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:25:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:25:45,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:25:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:25:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:25:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:25:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:25:45,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:25:45,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:25:45,491 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:25:45,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:25:45 BoogieIcfgContainer [2021-05-06 08:25:45,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:25:45,493 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:25:45,493 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:25:45,494 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:25:45,502 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:25:45" (1/1) ... [2021-05-06 08:25:45,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:25:45 BasicIcfg [2021-05-06 08:25:45,521 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:25:45,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:25:45,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:25:45,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:25:45,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:25:44" (1/4) ... [2021-05-06 08:25:45,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4f059e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:25:45, skipping insertion in model container [2021-05-06 08:25:45,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:25:45" (2/4) ... [2021-05-06 08:25:45,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4f059e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:25:45, skipping insertion in model container [2021-05-06 08:25:45,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:25:45" (3/4) ... [2021-05-06 08:25:45,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4f059e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:25:45, skipping insertion in model container [2021-05-06 08:25:45,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:25:45" (4/4) ... [2021-05-06 08:25:45,525 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound1.cJordan [2021-05-06 08:25:45,529 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:25:45,532 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:25:45,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:25:45,590 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:25:45,590 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:25:45,590 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:25:45,590 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:25:45,590 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:25:45,590 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:25:45,590 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:25:45,590 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:25:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:25:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:25:45,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:45,613 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:45,613 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:45,620 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-06 08:25:45,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:45,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704125791] [2021-05-06 08:25:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:45,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:45,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604243890] [2021-05-06 08:25:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:45,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:25:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 08:25:45,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:45,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704125791] [2021-05-06 08:25:45,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:45,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604243890] [2021-05-06 08:25:45,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604243890] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:25:45,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:25:45,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:25:45,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450454673] [2021-05-06 08:25:45,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:25:45,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:45,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:25:45,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:25:45,925 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:45,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:45,934 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-06 08:25:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:25:45,935 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:25:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:45,939 INFO L225 Difference]: With dead ends: 30 [2021-05-06 08:25:45,939 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:25:45,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:25:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:25:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:25:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:25:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 08:25:45,965 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 08:25:45,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:45,965 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 08:25:45,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 08:25:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:25:45,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:45,968 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:46,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:25:46,189 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:46,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:46,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-06 08:25:46,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:46,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055199682] [2021-05-06 08:25:46,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:46,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:46,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856775916] [2021-05-06 08:25:46,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:46,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:25:46,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:46,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:46,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:46,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055199682] [2021-05-06 08:25:46,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:46,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856775916] [2021-05-06 08:25:46,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856775916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:25:46,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:25:46,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:25:46,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473044438] [2021-05-06 08:25:46,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:25:46,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:25:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:25:46,380 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:46,396 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-06 08:25:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:25:46,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:25:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:46,397 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:25:46,397 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:25:46,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:25:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:25:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:25:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:25:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 08:25:46,400 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 08:25:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:46,401 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 08:25:46,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:25:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 08:25:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:25:46,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:46,402 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:46,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:46,622 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:46,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-06 08:25:46,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:46,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905696314] [2021-05-06 08:25:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:46,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:46,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390518897] [2021-05-06 08:25:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:46,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:25:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:46,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:46,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905696314] [2021-05-06 08:25:46,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390518897] [2021-05-06 08:25:46,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390518897] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:25:46,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:25:46,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:25:46,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531964571] [2021-05-06 08:25:46,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:25:46,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:46,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:25:46,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:25:46,818 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:25:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:47,013 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-06 08:25:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:25:47,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:25:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:47,015 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:25:47,015 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 08:25:47,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:25:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 08:25:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-06 08:25:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:25:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 08:25:47,019 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2021-05-06 08:25:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:47,019 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 08:25:47,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:25:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 08:25:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:25:47,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:47,020 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:47,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:47,233 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:47,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-06 08:25:47,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:47,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354293934] [2021-05-06 08:25:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:47,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:47,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785888098] [2021-05-06 08:25:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:25:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:25:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:25:47,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:47,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:47,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:25:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:25:47,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:25:47,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354293934] [2021-05-06 08:25:47,397 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:25:47,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785888098] [2021-05-06 08:25:47,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785888098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:25:47,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:25:47,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:25:47,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188245359] [2021-05-06 08:25:47,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:25:47,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:25:47,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:25:47,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:25:47,399 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:25:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:25:47,485 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-06 08:25:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:25:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:25:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:25:47,488 INFO L225 Difference]: With dead ends: 41 [2021-05-06 08:25:47,488 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:25:47,490 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:25:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:25:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-05-06 08:25:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:25:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 08:25:47,499 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 08:25:47,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:25:47,499 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 08:25:47,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:25:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 08:25:47,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:25:47,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:25:47,501 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:25:47,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:47,712 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:25:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:25:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-06 08:25:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:25:47,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760812436] [2021-05-06 08:25:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:25:47,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:25:47,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283070120] [2021-05-06 08:25:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:25:47,862 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:25:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:25:47,881 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:25:47,947 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:25:47,948 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:25:48,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:25:48,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:25:48 BasicIcfg [2021-05-06 08:25:48,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:25:48,170 INFO L168 Benchmark]: Toolchain (without parser) took 3235.39 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 165.0 MB in the beginning and 184.9 MB in the end (delta: -19.9 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:25:48,170 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 200.3 MB. Free memory is still 182.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:25:48,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.36 ms. Allocated memory is still 200.3 MB. Free memory was 164.9 MB in the beginning and 155.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:25:48,171 INFO L168 Benchmark]: Boogie Preprocessor took 67.63 ms. Allocated memory is still 200.3 MB. Free memory was 155.1 MB in the beginning and 182.9 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:25:48,171 INFO L168 Benchmark]: RCFGBuilder took 284.50 ms. Allocated memory is still 200.3 MB. Free memory was 182.9 MB in the beginning and 168.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:25:48,171 INFO L168 Benchmark]: IcfgTransformer took 27.75 ms. Allocated memory is still 200.3 MB. Free memory was 168.2 MB in the beginning and 166.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:25:48,171 INFO L168 Benchmark]: TraceAbstraction took 2648.32 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 166.1 MB in the beginning and 184.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 23.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:25:48,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 200.3 MB. Free memory is still 182.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 200.36 ms. Allocated memory is still 200.3 MB. Free memory was 164.9 MB in the beginning and 155.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.63 ms. Allocated memory is still 200.3 MB. Free memory was 155.1 MB in the beginning and 182.9 MB in the end (delta: -27.8 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.50 ms. Allocated memory is still 200.3 MB. Free memory was 182.9 MB in the beginning and 168.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 27.75 ms. Allocated memory is still 200.3 MB. Free memory was 168.2 MB in the beginning and 166.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2648.32 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 166.1 MB in the beginning and 184.9 MB in the end (delta: -18.8 MB). Peak memory consumption was 23.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=21, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(counter)=0, A=11, counter=0, R=4] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=11, counter=0, R=4] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [\old(counter)=0, A=11, counter=0, r=5, R=4, u=9, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=11, counter=1, counter++=0, r=5, R=4, u=9, v=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=11, counter=1, R=4, r=5, u=9, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=11, counter=1, r=5, R=4, u=9, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=11, counter=1, r=4, R=4, u=9, v=3] [L34] EXPR counter++ VAL [\old(counter)=0, A=11, counter=2, counter++=1, R=4, r=4, u=9, v=3] [L34] COND FALSE !(counter++<1) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2562.2ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 15.9ms, AutomataDifference: 332.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 106 SDtfs, 24 SDslu, 217 SDs, 0 SdLazy, 90 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 218.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 30.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 53.9ms SsaConstructionTime, 164.4ms SatisfiabilityAnalysisTime, 369.5ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 255 SizeOfPredicates, 6 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...