/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/ps2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:07:17,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:07:17,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:07:17,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:07:17,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:07:17,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:07:17,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:07:17,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:07:17,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:07:17,379 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:07:17,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:07:17,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:07:17,382 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:07:17,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:07:17,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:07:17,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:07:17,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:07:17,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:07:17,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:07:17,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:07:17,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:07:17,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:07:17,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:07:17,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:07:17,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:07:17,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:07:17,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:07:17,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:07:17,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:07:17,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:07:17,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:07:17,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:07:17,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:07:17,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:07:17,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:07:17,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:07:17,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:07:17,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:07:17,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:07:17,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:07:17,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:07:17,464 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:07:17,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:07:17,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:07:17,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:07:17,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:07:17,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:07:17,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:07:17,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:07:17,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:07:17,467 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:07:17,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:07:17,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:07:17,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:07:17,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:07:17,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:07:17,825 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:07:17,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2-ll.c [2021-05-06 07:07:17,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14ad276f/3a1252299f3749c9994627a3d169c484/FLAG712ad653d [2021-05-06 07:07:18,354 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:07:18,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2-ll.c [2021-05-06 07:07:18,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14ad276f/3a1252299f3749c9994627a3d169c484/FLAG712ad653d [2021-05-06 07:07:18,739 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c14ad276f/3a1252299f3749c9994627a3d169c484 [2021-05-06 07:07:18,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:07:18,743 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:07:18,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:07:18,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:07:18,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:07:18,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd3bfce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18, skipping insertion in model container [2021-05-06 07:07:18,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:07:18,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:07:18,870 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/ps2-ll.c[454,467] [2021-05-06 07:07:18,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:07:18,886 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:07:18,907 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/ps2-ll.c[454,467] [2021-05-06 07:07:18,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:07:18,936 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:07:18,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18 WrapperNode [2021-05-06 07:07:18,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:07:18,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:07:18,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:07:18,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:07:18,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (1/1) ... [2021-05-06 07:07:18,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:07:18,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:07:18,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:07:18,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:07:18,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (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 07:07:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:07:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:07:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:07:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:07:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:07:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:07:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:07:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:07:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:07:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:07:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:07:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:07:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:07:19,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:07:19,211 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:07:19,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:07:19 BoogieIcfgContainer [2021-05-06 07:07:19,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:07:19,217 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:07:19,225 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:07:19,226 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:07:19,228 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:07:19" (1/1) ... [2021-05-06 07:07:19,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:07:19 BasicIcfg [2021-05-06 07:07:19,247 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:07:19,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:07:19,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:07:19,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:07:19,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:07:18" (1/4) ... [2021-05-06 07:07:19,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355b1945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:07:19, skipping insertion in model container [2021-05-06 07:07:19,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:07:18" (2/4) ... [2021-05-06 07:07:19,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355b1945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:07:19, skipping insertion in model container [2021-05-06 07:07:19,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:07:19" (3/4) ... [2021-05-06 07:07:19,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355b1945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:07:19, skipping insertion in model container [2021-05-06 07:07:19,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:07:19" (4/4) ... [2021-05-06 07:07:19,267 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll.cJordan [2021-05-06 07:07:19,285 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:07:19,288 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:07:19,320 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:07:19,346 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:07:19,346 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:07:19,346 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:07:19,346 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:07:19,346 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:07:19,346 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:07:19,347 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:07:19,347 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:07:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:07:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 07:07:19,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:19,363 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:19,363 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1229966674, now seen corresponding path program 1 times [2021-05-06 07:07:19,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:19,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010181658] [2021-05-06 07:07:19,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:19,450 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:19,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920907027] [2021-05-06 07:07:19,450 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 07:07:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:07:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:07:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:19,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:19,651 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 07:07:19,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:19,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010181658] [2021-05-06 07:07:19,651 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:19,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920907027] [2021-05-06 07:07:19,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920907027] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:07:19,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:07:19,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:07:19,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679414153] [2021-05-06 07:07:19,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:07:19,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:19,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:07:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:07:19,670 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 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 07:07:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:19,719 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 07:07:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:07:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 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 07:07:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:19,727 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:07:19,727 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 07:07:19,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:07:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 07:07:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 07:07:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 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 07:07:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-06 07:07:19,757 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-06 07:07:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:19,757 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-06 07:07:19,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 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 07:07:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-06 07:07:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:07:19,758 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:19,759 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:19,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 07:07:19,984 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 726352862, now seen corresponding path program 1 times [2021-05-06 07:07:19,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:19,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205700142] [2021-05-06 07:07:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:20,012 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:20,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718782428] [2021-05-06 07:07:20,012 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 07:07:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:07:20,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:07:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:20,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:20,207 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 07:07:20,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:20,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205700142] [2021-05-06 07:07:20,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:20,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718782428] [2021-05-06 07:07:20,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718782428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:07:20,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:07:20,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:07:20,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428817824] [2021-05-06 07:07:20,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:07:20,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:07:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:07:20,211 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 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 07:07:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:20,248 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-05-06 07:07:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:07:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 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 18 [2021-05-06 07:07:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:20,250 INFO L225 Difference]: With dead ends: 31 [2021-05-06 07:07:20,250 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:07:20,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:07:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:07:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:07:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 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 07:07:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-05-06 07:07:20,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-05-06 07:07:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:20,255 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-05-06 07:07:20,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 3 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 07:07:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-05-06 07:07:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 07:07:20,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:20,257 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:20,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:20,482 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -796689234, now seen corresponding path program 2 times [2021-05-06 07:07:20,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:20,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394608880] [2021-05-06 07:07:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:20,493 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:20,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866420630] [2021-05-06 07:07:20,494 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 07:07:20,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:07:20,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:07:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:07:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:20,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:20,702 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 07:07:20,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:20,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394608880] [2021-05-06 07:07:20,702 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:20,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866420630] [2021-05-06 07:07:20,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866420630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:07:20,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:07:20,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:07:20,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263154631] [2021-05-06 07:07:20,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:07:20,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:07:20,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:07:20,704 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:07:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:20,766 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-05-06 07:07:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:07:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-06 07:07:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:20,771 INFO L225 Difference]: With dead ends: 38 [2021-05-06 07:07:20,771 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 07:07:20,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:07:20,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 07:07:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 07:07:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 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 07:07:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-06 07:07:20,782 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 25 [2021-05-06 07:07:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:20,783 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-06 07:07:20,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:07:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-06 07:07:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 07:07:20,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:07:20,784 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:07:21,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:21,001 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:07:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:07:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash 84982238, now seen corresponding path program 3 times [2021-05-06 07:07:21,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:07:21,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057263000] [2021-05-06 07:07:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:07:21,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:07:21,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960050922] [2021-05-06 07:07:21,021 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 07:07:21,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 07:07:21,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:07:21,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:07:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:07:21,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:21,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:21,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:07:21,225 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 07:07:21,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:07:21,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057263000] [2021-05-06 07:07:21,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:07:21,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960050922] [2021-05-06 07:07:21,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960050922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:07:21,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:07:21,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:07:21,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996985414] [2021-05-06 07:07:21,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:07:21,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:07:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:07:21,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:07:21,228 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:07:21,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:07:21,255 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-05-06 07:07:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:07:21,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-05-06 07:07:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:07:21,256 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:07:21,256 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:07:21,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:07:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:07:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:07:21,257 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 07:07:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:07:21,257 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-06 07:07:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:07:21,258 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:07:21,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:07:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:07:21,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:07:21,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:07:21,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:07:21 BasicIcfg [2021-05-06 07:07:21,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:07:21,478 INFO L168 Benchmark]: Toolchain (without parser) took 2734.88 ms. Allocated memory was 220.2 MB in the beginning and 292.6 MB in the end (delta: 72.4 MB). Free memory was 185.5 MB in the beginning and 261.7 MB in the end (delta: -76.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:07:21,478 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 220.2 MB. Free memory was 202.3 MB in the beginning and 202.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:07:21,478 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.13 ms. Allocated memory is still 220.2 MB. Free memory was 185.3 MB in the beginning and 204.0 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:21,478 INFO L168 Benchmark]: Boogie Preprocessor took 25.49 ms. Allocated memory is still 220.2 MB. Free memory was 204.0 MB in the beginning and 202.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:21,478 INFO L168 Benchmark]: RCFGBuilder took 243.79 ms. Allocated memory is still 220.2 MB. Free memory was 202.5 MB in the beginning and 188.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:21,479 INFO L168 Benchmark]: IcfgTransformer took 29.70 ms. Allocated memory is still 220.2 MB. Free memory was 188.8 MB in the beginning and 187.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:07:21,479 INFO L168 Benchmark]: TraceAbstraction took 2215.79 ms. Allocated memory was 220.2 MB in the beginning and 292.6 MB in the end (delta: 72.4 MB). Free memory was 187.3 MB in the beginning and 261.7 MB in the end (delta: -74.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:07:21,479 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 220.2 MB. Free memory was 202.3 MB in the beginning and 202.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.13 ms. Allocated memory is still 220.2 MB. Free memory was 185.3 MB in the beginning and 204.0 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.49 ms. Allocated memory is still 220.2 MB. Free memory was 204.0 MB in the beginning and 202.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 243.79 ms. Allocated memory is still 220.2 MB. Free memory was 202.5 MB in the beginning and 188.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 29.70 ms. Allocated memory is still 220.2 MB. Free memory was 188.8 MB in the beginning and 187.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2215.79 ms. Allocated memory was 220.2 MB in the beginning and 292.6 MB in the end (delta: 72.4 MB). Free memory was 187.3 MB in the beginning and 261.7 MB in the end (delta: -74.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2129.6ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 11.5ms, AutomataDifference: 209.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 64 SDtfs, 29 SDslu, 225 SDs, 0 SdLazy, 111 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 85.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 143.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=3, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.2ms SsaConstructionTime, 102.2ms SatisfiabilityAnalysisTime, 490.2ms InterpolantComputationTime, 86 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 5 NumberOfNonLiveVariables, 440 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 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...