/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:27:07,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:27:07,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:27:07,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:27:07,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:27:07,322 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:27:07,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:27:07,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:27:07,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:27:07,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:27:07,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:27:07,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:27:07,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:27:07,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:27:07,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:27:07,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:27:07,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:27:07,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:27:07,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:27:07,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:27:07,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:27:07,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:27:07,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:27:07,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:27:07,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:27:07,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:27:07,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:27:07,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:27:07,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:27:07,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:27:07,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:27:07,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:27:07,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:27:07,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:27:07,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:27:07,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:27:07,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:27:07,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:27:07,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:27:07,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:27:07,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:27:07,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:27:07,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:27:07,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:27:07,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:27:07,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:27:07,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:27:07,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:27:07,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:27:07,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:27:07,383 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:27:07,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:27:07,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:27:07,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:27:07,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:27:07,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:27:07,621 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:27:07,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c [2021-05-06 08:27:07,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da614634/131d5165d4e646c28efd6ec618c8e909/FLAGdb95028ab [2021-05-06 08:27:08,003 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:27:08,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound2.c [2021-05-06 08:27:08,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da614634/131d5165d4e646c28efd6ec618c8e909/FLAGdb95028ab [2021-05-06 08:27:08,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8da614634/131d5165d4e646c28efd6ec618c8e909 [2021-05-06 08:27:08,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:27:08,027 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:27:08,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:27:08,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:27:08,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:27:08,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56af1f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08, skipping insertion in model container [2021-05-06 08:27:08,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:27:08,051 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:27:08,125 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_valuebound2.c[524,537] [2021-05-06 08:27:08,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:27:08,139 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:27:08,146 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_valuebound2.c[524,537] [2021-05-06 08:27:08,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:27:08,158 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:27:08,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08 WrapperNode [2021-05-06 08:27:08,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:27:08,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:27:08,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:27:08,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:27:08,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:27:08,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:27:08,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:27:08,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:27:08,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (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 08:27:08,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:27:08,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:27:08,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:27:08,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:27:08,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:27:08,293 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:27:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:27:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:27:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:27:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:27:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:27:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:27:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:27:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:27:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:27:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:27:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:27:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:27:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:27:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:27:08,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:27:08,444 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:27:08,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:27:08 BoogieIcfgContainer [2021-05-06 08:27:08,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:27:08,446 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:27:08,446 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:27:08,446 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:27:08,448 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:27:08" (1/1) ... [2021-05-06 08:27:08,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:27:08 BasicIcfg [2021-05-06 08:27:08,458 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:27:08,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:27:08,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:27:08,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:27:08,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:27:08" (1/4) ... [2021-05-06 08:27:08,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deff5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:27:08, skipping insertion in model container [2021-05-06 08:27:08,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:27:08" (2/4) ... [2021-05-06 08:27:08,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deff5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:27:08, skipping insertion in model container [2021-05-06 08:27:08,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:27:08" (3/4) ... [2021-05-06 08:27:08,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deff5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:27:08, skipping insertion in model container [2021-05-06 08:27:08,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:27:08" (4/4) ... [2021-05-06 08:27:08,462 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound2.cJordan [2021-05-06 08:27:08,465 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:27:08,468 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:27:08,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:27:08,489 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:27:08,489 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:27:08,489 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:27:08,489 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:27:08,489 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:27:08,489 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:27:08,490 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:27:08,490 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:27:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:27:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:27:08,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:08,502 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:08,503 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1450325676, now seen corresponding path program 1 times [2021-05-06 08:27:08,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:08,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526028465] [2021-05-06 08:27:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:27:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:27:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:27:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:27:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:27:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:27:08,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:08,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526028465] [2021-05-06 08:27:08,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526028465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:27:08,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:27:08,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:27:08,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4247488] [2021-05-06 08:27:08,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:27:08,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:08,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:27:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:27:08,681 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:27:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:08,751 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-06 08:27:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:27:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:27:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:08,757 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:27:08,758 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:27:08,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:27:08,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:27:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:27:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:27:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-06 08:27:08,778 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-06 08:27:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:08,778 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-06 08:27:08,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:27:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-06 08:27:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:27:08,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:08,780 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:27:08,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:27:08,780 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 512475503, now seen corresponding path program 1 times [2021-05-06 08:27:08,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:08,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262295409] [2021-05-06 08:27:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:08,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:08,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552474035] [2021-05-06 08:27:08,795 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 08:27:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:08,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:27:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:09,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:09,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:31,482 WARN L205 SmtUtils]: Spent 19.23 s on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-05-06 08:27:32,086 WARN L205 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-06 08:27:32,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:27:32,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:32,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262295409] [2021-05-06 08:27:32,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:32,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552474035] [2021-05-06 08:27:32,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552474035] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:27:32,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:27:32,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 08:27:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719457805] [2021-05-06 08:27:32,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:27:32,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:27:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2021-05-06 08:27:32,211 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:27:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:27:43,205 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-06 08:27:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:27:43,222 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-06 08:27:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:27:43,222 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:27:43,223 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:27:43,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 22981.4ms TimeCoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2021-05-06 08:27:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:27:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:27:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:27:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-06 08:27:43,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2021-05-06 08:27:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:27:43,229 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-06 08:27:43,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 states have internal predecessors, (12), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:27:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-06 08:27:43,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:27:43,230 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:27:43,230 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-05-06 08:27:43,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:27:43,431 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:27:43,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:27:43,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1822507357, now seen corresponding path program 1 times [2021-05-06 08:27:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:27:43,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346916825] [2021-05-06 08:27:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:27:43,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:27:43,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046409207] [2021-05-06 08:27:43,442 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 08:27:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:27:43,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 08:27:43,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:27:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:43,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:46,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:46,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:46,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:27:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:27:49,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:27:49,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346916825] [2021-05-06 08:27:49,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:27:49,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046409207] [2021-05-06 08:27:49,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046409207] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:27:49,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:27:49,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:27:49,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265350665] [2021-05-06 08:27:49,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:27:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:27:49,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:27:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=48, Unknown=2, NotChecked=0, Total=72 [2021-05-06 08:27:49,813 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:28:09,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:09,500 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-06 08:28:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:28:09,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-05-06 08:28:09,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:09,501 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:28:09,501 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:28:09,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6177.6ms TimeCoverageRelationStatistics Valid=33, Invalid=75, Unknown=2, NotChecked=0, Total=110 [2021-05-06 08:28:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:28:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:28:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:28:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-05-06 08:28:09,505 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 41 [2021-05-06 08:28:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:09,506 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-05-06 08:28:09,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:28:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-05-06 08:28:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:28:09,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:09,507 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-05-06 08:28:09,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:09,708 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:09,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:09,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1851136508, now seen corresponding path program 1 times [2021-05-06 08:28:09,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:09,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680254350] [2021-05-06 08:28:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:09,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:09,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665738968] [2021-05-06 08:28:09,728 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 08:28:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:28:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:09,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:09,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:09,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:09,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:09,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:09,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:09,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:09,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,147 WARN L205 SmtUtils]: Spent 19.21 s on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-05-06 08:28:29,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,101 WARN L205 SmtUtils]: Spent 10.92 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-06 08:28:40,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:28:40,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680254350] [2021-05-06 08:28:40,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665738968] [2021-05-06 08:28:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665738968] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:40,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:40,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-06 08:28:40,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414135431] [2021-05-06 08:28:40,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:28:40,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:40,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:28:40,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:28:40,187 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:28:51,135 WARN L205 SmtUtils]: Spent 10.91 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-06 08:28:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:51,177 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-06 08:28:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:28:51,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-05-06 08:28:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:51,177 INFO L225 Difference]: With dead ends: 24 [2021-05-06 08:28:51,177 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:28:51,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 41172.8ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:28:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:28:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:28:51,178 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 08:28:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:28:51,178 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-06 08:28:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:51,178 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:28:51,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:28:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:28:51,178 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:28:51,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:51,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:28:51 BasicIcfg [2021-05-06 08:28:51,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:28:51,382 INFO L168 Benchmark]: Toolchain (without parser) took 103355.30 ms. Allocated memory was 179.3 MB in the beginning and 228.6 MB in the end (delta: 49.3 MB). Free memory was 145.0 MB in the beginning and 167.3 MB in the end (delta: -22.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:28:51,382 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:28:51,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.76 ms. Allocated memory is still 179.3 MB. Free memory was 144.8 MB in the beginning and 135.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:28:51,383 INFO L168 Benchmark]: Boogie Preprocessor took 60.20 ms. Allocated memory is still 179.3 MB. Free memory was 135.0 MB in the beginning and 162.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:28:51,383 INFO L168 Benchmark]: RCFGBuilder took 225.70 ms. Allocated memory is still 179.3 MB. Free memory was 162.6 MB in the beginning and 147.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:28:51,383 INFO L168 Benchmark]: IcfgTransformer took 11.89 ms. Allocated memory is still 179.3 MB. Free memory was 147.5 MB in the beginning and 146.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:28:51,383 INFO L168 Benchmark]: TraceAbstraction took 102923.45 ms. Allocated memory was 179.3 MB in the beginning and 228.6 MB in the end (delta: 49.3 MB). Free memory was 146.0 MB in the beginning and 167.3 MB in the end (delta: -21.3 MB). Peak memory consumption was 27.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:28:51,383 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 179.3 MB. Free memory is still 161.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 129.76 ms. Allocated memory is still 179.3 MB. Free memory was 144.8 MB in the beginning and 135.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.20 ms. Allocated memory is still 179.3 MB. Free memory was 135.0 MB in the beginning and 162.6 MB in the end (delta: -27.6 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 225.70 ms. Allocated memory is still 179.3 MB. Free memory was 162.6 MB in the beginning and 147.5 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.89 ms. Allocated memory is still 179.3 MB. Free memory was 147.5 MB in the beginning and 146.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 102923.45 ms. Allocated memory was 179.3 MB in the beginning and 228.6 MB in the end (delta: 49.3 MB). Free memory was 146.0 MB in the beginning and 167.3 MB in the end (delta: -21.3 MB). Peak memory consumption was 27.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 102891.2ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 9.4ms, AutomataDifference: 41783.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 96 SDtfs, 62 SDslu, 242 SDs, 0 SdLazy, 165 SolverSat, 24 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 30660.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 70365.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 57.3ms SsaConstructionTime, 121.1ms SatisfiabilityAnalysisTime, 60007.1ms InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 144 ConstructedInterpolants, 8 QuantifiedInterpolants, 800 SizeOfPredicates, 16 NumberOfNonLiveVariables, 431 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 104/104 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...