/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/ps2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:14:28,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:14:28,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:14:28,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:14:28,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:14:28,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:14:28,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:14:28,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:14:28,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:14:28,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:14:28,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:14:28,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:14:28,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:14:28,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:14:28,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:14:28,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:14:28,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:14:28,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:14:28,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:14:28,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:14:28,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:14:28,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:14:28,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:14:28,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:14:28,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:14:28,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:14:28,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:14:28,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:14:28,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:14:28,275 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:14:28,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:14:28,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:14:28,277 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:14:28,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:14:28,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:14:28,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:14:28,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:14:28,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:14:28,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:14:28,278 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:14:28,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:14:28,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:14:28,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:14:28,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:14:28,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:14:28,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:14:28,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:14:28,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:14:28,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:14:28,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:14:28,281 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:14:28,281 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:14:28,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:14:28,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:14:28,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:14:28,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:14:28,580 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:14:28,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound20.c [2021-05-06 10:14:28,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/feaf0bba1/d80eeb735686489d87da13b339c0030d/FLAGc947be2ac [2021-05-06 10:14:29,108 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:14:29,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound20.c [2021-05-06 10:14:29,113 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/feaf0bba1/d80eeb735686489d87da13b339c0030d/FLAGc947be2ac [2021-05-06 10:14:29,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/feaf0bba1/d80eeb735686489d87da13b339c0030d [2021-05-06 10:14:29,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:14:29,512 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:14:29,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:14:29,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:14:29,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:14:29,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e16fafd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29, skipping insertion in model container [2021-05-06 10:14:29,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:14:29,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:14:29,646 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/ps2-ll_valuebound20.c[454,467] [2021-05-06 10:14:29,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:14:29,663 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:14:29,673 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/ps2-ll_valuebound20.c[454,467] [2021-05-06 10:14:29,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:14:29,688 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:14:29,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29 WrapperNode [2021-05-06 10:14:29,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:14:29,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:14:29,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:14:29,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:14:29,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... [2021-05-06 10:14:29,737 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:14:29,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:14:29,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:14:29,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:14:29,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:14:29,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:14:29,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:14:29,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:14:29,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:14:29,843 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:14:29,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:14:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:14:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:14:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:14:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:14:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:14:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:14:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:14:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:14:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:14:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:14:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:14:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:14:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:14:29,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:14:30,175 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:14:30,176 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:14:30,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:14:30 BoogieIcfgContainer [2021-05-06 10:14:30,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:14:30,178 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:14:30,178 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:14:30,179 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:14:30,181 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:14:30" (1/1) ... [2021-05-06 10:14:30,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:14:30 BasicIcfg [2021-05-06 10:14:30,196 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:14:30,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:14:30,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:14:30,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:14:30,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:14:29" (1/4) ... [2021-05-06 10:14:30,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749a575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:14:30, skipping insertion in model container [2021-05-06 10:14:30,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:14:29" (2/4) ... [2021-05-06 10:14:30,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749a575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:14:30, skipping insertion in model container [2021-05-06 10:14:30,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:14:30" (3/4) ... [2021-05-06 10:14:30,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749a575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:14:30, skipping insertion in model container [2021-05-06 10:14:30,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:14:30" (4/4) ... [2021-05-06 10:14:30,203 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound20.cJordan [2021-05-06 10:14:30,207 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:14:30,211 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:14:30,225 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:14:30,252 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:14:30,252 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:14:30,253 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:14:30,253 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:14:30,253 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:14:30,253 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:14:30,253 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:14:30,253 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:14:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:14:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:14:30,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:30,275 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:30,275 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:30,280 INFO L82 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2021-05-06 10:14:30,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:30,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046163636] [2021-05-06 10:14:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:30,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:14:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:30,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:14:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:14:30,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:30,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046163636] [2021-05-06 10:14:30,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046163636] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:14:30,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:14:30,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:14:30,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340391058] [2021-05-06 10:14:30,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:14:30,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:30,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:14:30,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:14:30,602 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:30,709 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-05-06 10:14:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:14:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:14:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:30,717 INFO L225 Difference]: With dead ends: 27 [2021-05-06 10:14:30,718 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 10:14:30,719 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:14:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 10:14:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 10:14:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:14:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-06 10:14:30,748 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-05-06 10:14:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:30,748 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-06 10:14:30,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-06 10:14:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:14:30,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:30,749 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:30,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:14:30,750 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2021-05-06 10:14:30,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:30,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437670231] [2021-05-06 10:14:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:30,763 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:30,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803505063] [2021-05-06 10:14:30,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:30,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:14:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:30,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:14:31,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437670231] [2021-05-06 10:14:31,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803505063] [2021-05-06 10:14:31,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803505063] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:14:31,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:14:31,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:14:31,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134942703] [2021-05-06 10:14:31,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:14:31,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:31,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:14:31,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:14:31,031 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:31,059 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-05-06 10:14:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:14:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:14:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:31,060 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:14:31,060 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 10:14:31,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:14:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 10:14:31,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 10:14:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:14:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-05-06 10:14:31,066 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2021-05-06 10:14:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:31,066 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-05-06 10:14:31,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:14:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-05-06 10:14:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 10:14:31,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:31,067 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:31,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:14:31,291 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2021-05-06 10:14:31,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:31,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092111979] [2021-05-06 10:14:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:31,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:31,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352297128] [2021-05-06 10:14:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:14:31,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:14:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:31,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:14:31,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:31,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092111979] [2021-05-06 10:14:31,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:31,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352297128] [2021-05-06 10:14:31,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352297128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:14:31,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:14:31,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:14:31,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664481609] [2021-05-06 10:14:31,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:14:31,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:31,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:14:31,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:14:31,448 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:14:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:31,496 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-05-06 10:14:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:14:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 10:14:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:31,498 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:14:31,498 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:14:31,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:14:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:14:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 10:14:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:14:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-05-06 10:14:31,504 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2021-05-06 10:14:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:31,504 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-05-06 10:14:31,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:14:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-05-06 10:14:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 10:14:31,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:31,506 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:31,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:31,711 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash -522906656, now seen corresponding path program 2 times [2021-05-06 10:14:31,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:31,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491660268] [2021-05-06 10:14:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:31,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:31,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559477797] [2021-05-06 10:14:31,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:31,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:14:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:14:31,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:14:31,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:31,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:14:31,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:31,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491660268] [2021-05-06 10:14:31,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:31,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559477797] [2021-05-06 10:14:31,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559477797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:14:31,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:14:31,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:14:31,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001632818] [2021-05-06 10:14:31,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:14:31,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:14:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:14:31,968 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:14:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:32,054 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-05-06 10:14:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:14:32,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2021-05-06 10:14:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:32,057 INFO L225 Difference]: With dead ends: 44 [2021-05-06 10:14:32,058 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:14:32,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:14:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:14:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:14:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:14:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-06 10:14:32,065 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 31 [2021-05-06 10:14:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:32,065 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-06 10:14:32,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:14:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-06 10:14:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 10:14:32,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:14:32,066 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:14:32,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:32,269 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:14:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:14:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1704072427, now seen corresponding path program 3 times [2021-05-06 10:14:32,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:14:32,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143107513] [2021-05-06 10:14:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:14:32,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:14:32,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801224067] [2021-05-06 10:14:32,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:32,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:14:32,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:14:32,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:14:32,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:14:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:32,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:14:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-06 10:14:32,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:14:32,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143107513] [2021-05-06 10:14:32,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:14:32,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801224067] [2021-05-06 10:14:32,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801224067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:14:32,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:14:32,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:14:32,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217643479] [2021-05-06 10:14:32,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:14:32,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:14:32,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:14:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:14:32,486 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:14:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:14:32,525 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-05-06 10:14:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:14:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-05-06 10:14:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:14:32,526 INFO L225 Difference]: With dead ends: 41 [2021-05-06 10:14:32,526 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:14:32,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:14:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:14:32,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:14:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 10:14:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:14:32,527 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-05-06 10:14:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:14:32,527 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:14:32,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:14:32,528 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:14:32,528 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:14:32,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:14:32,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:14:32 BasicIcfg [2021-05-06 10:14:32,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:14:32,745 INFO L168 Benchmark]: Toolchain (without parser) took 3232.76 ms. Allocated memory was 203.4 MB in the beginning and 252.7 MB in the end (delta: 49.3 MB). Free memory was 169.2 MB in the beginning and 191.5 MB in the end (delta: -22.3 MB). Peak memory consumption was 27.9 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:32,745 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 203.4 MB. Free memory is still 185.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:14:32,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 173.80 ms. Allocated memory is still 203.4 MB. Free memory was 169.0 MB in the beginning and 159.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:32,745 INFO L168 Benchmark]: Boogie Preprocessor took 46.98 ms. Allocated memory is still 203.4 MB. Free memory was 159.4 MB in the beginning and 187.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 5.3 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:32,745 INFO L168 Benchmark]: RCFGBuilder took 439.43 ms. Allocated memory is still 203.4 MB. Free memory was 187.4 MB in the beginning and 173.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:32,746 INFO L168 Benchmark]: IcfgTransformer took 17.92 ms. Allocated memory is still 203.4 MB. Free memory was 173.7 MB in the beginning and 172.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:32,746 INFO L168 Benchmark]: TraceAbstraction took 2546.55 ms. Allocated memory was 203.4 MB in the beginning and 252.7 MB in the end (delta: 49.3 MB). Free memory was 171.9 MB in the beginning and 191.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:14:32,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 203.4 MB. Free memory is still 185.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 173.80 ms. Allocated memory is still 203.4 MB. Free memory was 169.0 MB in the beginning and 159.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.98 ms. Allocated memory is still 203.4 MB. Free memory was 159.4 MB in the beginning and 187.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 5.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 439.43 ms. Allocated memory is still 203.4 MB. Free memory was 187.4 MB in the beginning and 173.7 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 17.92 ms. Allocated memory is still 203.4 MB. Free memory was 173.7 MB in the beginning and 172.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2546.55 ms. Allocated memory was 203.4 MB in the beginning and 252.7 MB in the end (delta: 49.3 MB). Free memory was 171.9 MB in the beginning and 191.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2491.0ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 13.9ms, AutomataDifference: 343.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 107 SDtfs, 42 SDslu, 302 SDs, 0 SdLazy, 121 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 150.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 226.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.6ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 55.4ms SsaConstructionTime, 167.9ms SatisfiabilityAnalysisTime, 741.2ms InterpolantComputationTime, 127 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 298 SizeOfPredicates, 5 NumberOfNonLiveVariables, 476 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 42/52 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...