/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/cohencu-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:11:18,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:11:18,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:11:18,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:11:18,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:11:18,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:11:18,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:11:18,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:11:18,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:11:18,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:11:18,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:11:18,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:11:18,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:11:18,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:11:18,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:11:18,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:11:18,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:11:18,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:11:18,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:11:18,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:11:18,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:11:18,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:11:18,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:11:18,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:11:18,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:11:18,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:11:18,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:11:18,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:11:18,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:11:18,231 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:11:18,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:11:18,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:11:18,232 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:11:18,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:11:18,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:11:18,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:11:18,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:11:18,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:11:18,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:11:18,233 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:11:18,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:11:18,233 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:11:18,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:11:18,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:11:18,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:11:18,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:11:18,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:11:18,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:11:18,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:11:18,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:11:18,234 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:11:18,235 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:11:18,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:11:18,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:11:18,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:11:18,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:11:18,733 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:11:18,734 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2021-05-06 07:11:18,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f729f1b51/41980fcb163048b09ef1a023365e789d/FLAG98661b214 [2021-05-06 07:11:19,330 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:11:19,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2021-05-06 07:11:19,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f729f1b51/41980fcb163048b09ef1a023365e789d/FLAG98661b214 [2021-05-06 07:11:19,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f729f1b51/41980fcb163048b09ef1a023365e789d [2021-05-06 07:11:19,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:11:19,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:11:19,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:11:19,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:11:19,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:11:19,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31af6f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19, skipping insertion in model container [2021-05-06 07:11:19,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:11:19,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:11:19,880 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/cohencu-ll_unwindbound1.c[596,609] [2021-05-06 07:11:19,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:11:19,899 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:11:19,945 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/cohencu-ll_unwindbound1.c[596,609] [2021-05-06 07:11:19,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:11:19,960 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:11:19,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19 WrapperNode [2021-05-06 07:11:19,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:11:19,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:11:19,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:11:19,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:11:19,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (1/1) ... [2021-05-06 07:11:19,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:11:19,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:11:19,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:11:19,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:11:19,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (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 07:11:20,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:11:20,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:11:20,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:11:20,034 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:11:20,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:11:20,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:11:20,034 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:11:20,034 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:11:20,034 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:11:20,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:11:20,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-06 07:11:20,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:11:20,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:11:20,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:11:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:11:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:11:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:11:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:11:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:11:20,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:11:20,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:11:20,285 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:11:20,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:11:20 BoogieIcfgContainer [2021-05-06 07:11:20,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:11:20,286 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:11:20,286 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:11:20,287 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:11:20,305 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:11:20" (1/1) ... [2021-05-06 07:11:20,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:11:20 BasicIcfg [2021-05-06 07:11:20,315 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:11:20,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:11:20,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:11:20,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:11:20,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:11:19" (1/4) ... [2021-05-06 07:11:20,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c173915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:11:20, skipping insertion in model container [2021-05-06 07:11:20,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:11:19" (2/4) ... [2021-05-06 07:11:20,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c173915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:11:20, skipping insertion in model container [2021-05-06 07:11:20,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:11:20" (3/4) ... [2021-05-06 07:11:20,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c173915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:11:20, skipping insertion in model container [2021-05-06 07:11:20,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:11:20" (4/4) ... [2021-05-06 07:11:20,324 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound1.cJordan [2021-05-06 07:11:20,328 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:11:20,330 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:11:20,344 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:11:20,364 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:11:20,364 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:11:20,364 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:11:20,364 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:11:20,364 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:11:20,364 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:11:20,364 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:11:20,364 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:11:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:11:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 07:11:20,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:11:20,382 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:11:20,382 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:11:20,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:11:20,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2021-05-06 07:11:20,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:11:20,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160718248] [2021-05-06 07:11:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:11:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:20,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:11:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:11:20,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:11:20,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160718248] [2021-05-06 07:11:20,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160718248] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:11:20,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:11:20,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:11:20,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669638465] [2021-05-06 07:11:20,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:11:20,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:11:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:11:20,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:11:20,548 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:11:20,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:11:20,658 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-05-06 07:11:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:11:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 07:11:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:11:20,664 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:11:20,664 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:11:20,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:11:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:11:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 07:11:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:11:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-05-06 07:11:20,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2021-05-06 07:11:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:11:20,689 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-05-06 07:11:20,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:11:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-05-06 07:11:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:11:20,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:11:20,690 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:11:20,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:11:20,691 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:11:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:11:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2021-05-06 07:11:20,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:11:20,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772420017] [2021-05-06 07:11:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:11:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:20,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:11:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:11:20,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:11:20,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772420017] [2021-05-06 07:11:20,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772420017] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:11:20,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:11:20,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:11:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395779567] [2021-05-06 07:11:20,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:11:20,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:11:20,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:11:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:11:20,764 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:11:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:11:20,869 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-05-06 07:11:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:11:20,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:11:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:11:20,871 INFO L225 Difference]: With dead ends: 28 [2021-05-06 07:11:20,871 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 07:11:20,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:11:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 07:11:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 07:11:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:11:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-05-06 07:11:20,876 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2021-05-06 07:11:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:11:20,876 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-05-06 07:11:20,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:11:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2021-05-06 07:11:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:11:20,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:11:20,877 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:11:20,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:11:20,877 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:11:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:11:20,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2021-05-06 07:11:20,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:11:20,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064627481] [2021-05-06 07:11:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:11:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:20,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:11:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:11:20,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:11:20,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064627481] [2021-05-06 07:11:20,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064627481] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:11:20,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:11:20,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:11:20,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755467627] [2021-05-06 07:11:20,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:11:20,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:11:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:11:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:11:20,957 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:11:21,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:11:21,154 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-06 07:11:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:11:21,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:11:21,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:11:21,155 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:11:21,155 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 07:11:21,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:11:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 07:11:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 07:11:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 07:11:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 07:11:21,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 07:11:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:11:21,160 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 07:11:21,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:11:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 07:11:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:11:21,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:11:21,160 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:11:21,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 07:11:21,161 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:11:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:11:21,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2021-05-06 07:11:21,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:11:21,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628825955] [2021-05-06 07:11:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:11:21,169 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:11:21,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319489354] [2021-05-06 07:11:21,170 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 07:11:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:11:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:11:21,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:11:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:11:21,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:11:21,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628825955] [2021-05-06 07:11:21,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:11:21,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319489354] [2021-05-06 07:11:21,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319489354] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:11:21,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:11:21,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:11:21,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116045424] [2021-05-06 07:11:21,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:11:21,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:11:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:11:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:11:21,297 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:11:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:11:21,336 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2021-05-06 07:11:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:11:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 07:11:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:11:21,337 INFO L225 Difference]: With dead ends: 48 [2021-05-06 07:11:21,337 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 07:11:21,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:11:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 07:11:21,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-05-06 07:11:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 07:11:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-05-06 07:11:21,341 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2021-05-06 07:11:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:11:21,341 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-05-06 07:11:21,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:11:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-05-06 07:11:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:11:21,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:11:21,342 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:11:21,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:11:21,559 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:11:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:11:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2021-05-06 07:11:21,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:11:21,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614769078] [2021-05-06 07:11:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:11:21,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:11:21,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76135755] [2021-05-06 07:11:21,567 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 07:11:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:11:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:11:21,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:11:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:11:21,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:11:21,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614769078] [2021-05-06 07:11:21,658 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:11:21,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76135755] [2021-05-06 07:11:21,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76135755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:11:21,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:11:21,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:11:21,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118549287] [2021-05-06 07:11:21,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:11:21,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:11:21,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:11:21,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:11:21,659 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:11:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:11:21,693 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-06 07:11:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:11:21,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 07:11:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:11:21,694 INFO L225 Difference]: With dead ends: 52 [2021-05-06 07:11:21,694 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 07:11:21,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:11:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 07:11:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-05-06 07:11:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 07:11:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-05-06 07:11:21,698 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2021-05-06 07:11:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:11:21,698 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-05-06 07:11:21,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:11:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-05-06 07:11:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:11:21,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:11:21,699 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:11:21,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:11:21,916 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:11:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:11:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2021-05-06 07:11:21,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:11:21,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085197235] [2021-05-06 07:11:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:11:21,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:11:21,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002228844] [2021-05-06 07:11:21,922 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 07:11:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:11:21,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:11:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:11:22,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:11:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 07:11:22,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:11:22,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085197235] [2021-05-06 07:11:22,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:11:22,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002228844] [2021-05-06 07:11:22,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002228844] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:11:22,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:11:22,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:11:22,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48826097] [2021-05-06 07:11:22,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:11:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:11:22,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:11:22,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:11:22,042 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:11:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:11:22,091 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-06 07:11:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:11:22,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 07:11:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:11:22,092 INFO L225 Difference]: With dead ends: 60 [2021-05-06 07:11:22,092 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 07:11:22,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:11:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 07:11:22,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 07:11:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 07:11:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2021-05-06 07:11:22,096 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2021-05-06 07:11:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:11:22,096 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2021-05-06 07:11:22,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:11:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2021-05-06 07:11:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 07:11:22,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:11:22,097 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 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 07:11:22,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:11:22,315 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:11:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:11:22,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2021-05-06 07:11:22,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:11:22,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941128095] [2021-05-06 07:11:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:11:22,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:11:22,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623208735] [2021-05-06 07:11:22,323 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 07:11:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 07:11:22,373 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 07:11:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 07:11:22,390 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 07:11:22,424 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 07:11:22,424 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 07:11:22,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:11:22,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:11:22 BasicIcfg [2021-05-06 07:11:22,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:11:22,667 INFO L168 Benchmark]: Toolchain (without parser) took 2904.91 ms. Allocated memory was 191.9 MB in the beginning and 230.7 MB in the end (delta: 38.8 MB). Free memory was 156.3 MB in the beginning and 170.4 MB in the end (delta: -14.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:11:22,667 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 172.9 MB in the end (delta: 78.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:11:22,667 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.20 ms. Allocated memory is still 191.9 MB. Free memory was 156.2 MB in the beginning and 174.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. [2021-05-06 07:11:22,667 INFO L168 Benchmark]: Boogie Preprocessor took 18.20 ms. Allocated memory is still 191.9 MB. Free memory was 174.6 MB in the beginning and 173.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:11:22,667 INFO L168 Benchmark]: RCFGBuilder took 305.49 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 156.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:11:22,667 INFO L168 Benchmark]: IcfgTransformer took 28.94 ms. Allocated memory is still 191.9 MB. Free memory was 156.8 MB in the beginning and 155.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:11:22,667 INFO L168 Benchmark]: TraceAbstraction took 2346.26 ms. Allocated memory was 191.9 MB in the beginning and 230.7 MB in the end (delta: 38.8 MB). Free memory was 155.2 MB in the beginning and 170.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 23.6 MB. Max. memory is 8.0 GB. [2021-05-06 07:11:22,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 172.9 MB in the end (delta: 78.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 198.20 ms. Allocated memory is still 191.9 MB. Free memory was 156.2 MB in the beginning and 174.6 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.20 ms. Allocated memory is still 191.9 MB. Free memory was 174.6 MB in the beginning and 173.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 305.49 ms. Allocated memory is still 191.9 MB. Free memory was 173.0 MB in the beginning and 156.8 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 28.94 ms. Allocated memory is still 191.9 MB. Free memory was 156.8 MB in the beginning and 155.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2346.26 ms. Allocated memory was 191.9 MB in the beginning and 230.7 MB in the end (delta: 38.8 MB). Free memory was 155.2 MB in the beginning and 170.4 MB in the end (delta: -15.2 MB). Peak memory consumption was 23.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=19, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_unsigned_short() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=1, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=1, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=1, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=1, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND FALSE !(counter++<1) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=1, counter=2, n=1, x=1, y=7, z=12] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2279.9ms, OverallIterations: 7, TraceHistogramMax: 7, EmptinessCheckTime: 11.8ms, AutomataDifference: 561.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 236 SDtfs, 47 SDslu, 424 SDs, 0 SdLazy, 233 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 296.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 270.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 34.3ms AutomataMinimizationTime, 6 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 33.6ms SsaConstructionTime, 106.6ms SatisfiabilityAnalysisTime, 393.5ms InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 350 SizeOfPredicates, 3 NumberOfNonLiveVariables, 369 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 28/28 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...